The Absurd Search For Dark Matter

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This video is sponsored by Brilliant. The first 200 people to sign up via brilliant.org/veritasium get 20% off a yearly subscription. Astronomers think there should be 5 times as much dark matter as ordinary matter - a shadow universe that makes up most of the mass in the universe. But after decades of trying, no experiments have found any trace of dark matter - except one.

A massive thanks to the wonderful people at the ARC Centre of Excellence for Dark Matter Physics www.centredarkmatter.org for showing us around and being on camera - Fleur Morrison, A/Prof Phillip Urquijo, Prof Elisabetta Barberio, Madeleine Zurowski and Grace Lawrence.
Thanks to Leo Fincher-Johnson and everyone at the Stawell gold mine for having us.
Massive thanks to Prof. Geraint Lewis - Geraint has been Veritasium’s go-to expert for anything astrophysics and cosmology related. Please check out his website, and buy his books, they’re great - www.geraintflewis.com
Thanks to Prof. Timothy Tait for the help to make sure we got the science right.
Thanks to Ingo Berg for illustrating the effect of dark matter on the rotation of a galaxy beltoforion.de/en/spiral_gala...

Galaxy cluster simulation from IllustrisTNG - www.tng-project.org
Venn Diagram of Dark Matter from Tim Tait - ve42.co/venn
The Bullet Cluster Image from Magellan, Hubble and Chandra telescopes - ve42.co/BC2
Bullet cluster animation from Andrew Robertson / Institute for Computational Cosmology / Durham University - ve42.co/BC3

Bernabei, R., Belli, P., Cappella, F., Cerulli, R., Dai, C. J., d’Angelo, A., ... & Ye, Z. P. (2008). First results from DAMA/LIBRA and the combined results with DAMA/NaI. The European Physical Journal C, 56(3), 333-355. - ve42.co/DAMA2008

Zwicky, F. (1933). Die rotverschiebung von extragalaktischen nebeln. Helvetica physica acta, 6, 110-127. - ve42.co/Zwicky1

Zwicky, F. (1937). On the Masses of Nebulae and of Clusters of Nebulae. The Astrophysical Journal, 86, 217. - ve42.co/Zwicky2

Rubin, V. C., & Ford Jr, W. K. (1970). Rotation of the Andromeda nebula from a spectroscopic survey of emission regions. The Astrophysical Journal, 159, 379. - ve42.co/Rubin1

Bosma, A., & Van der Kruit, P. C. (1979). The local mass-to-light ratio in spiral galaxies. Astronomy and Astrophysics, 79, 281-286. - ve42.co/Bosma1

Milgrom, M. (1983). A modification of the Newtonian dynamics as a possible alternative to the hidden mass hypothesis. The Astrophysical Journal, 270, 365-370. - ve42.co/mond1

Sanders, R. H., & McGaugh, S. S. (2002). Modified Newtonian dynamics as an alternative to dark matter. Annual Review of Astronomy and Astrophysics, 40(1), 263-317. - ve42.co/Mond2

M. Markevitch; A. H. Gonzalez; D. Clowe; A. Vikhlinin; L. David; W. Forman; C. Jones; S. Murray & W. Tucker (2004). "Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56". Astrophys. J. 606 (2): 819-824. - ve42.co/BC1

Great website about the CMB - background.uchicago.edu/~whu/i...

Galli, S., Iocco, F., Bertone, G., & Melchiorri, A. (2009). CMB constraints on dark matter models with large annihilation cross section. Physical Review D, 80(2), 023505. - ve42.co/CMB1

Antonello, M., Barberio, E., Baroncelli, T., Benziger, J., Bignell, L. J., Bolognino, I., ... & Xu, J. (2019). The SABRE project and the SABRE Proof-of-Principle. The European Physical Journal C, 79(4), 1-8. - ve42.co/SABRE1

Special thanks to Patreon supporters: Inconcision, Kelly Snook, TTST, Ross McCawley, Balkrishna Heroor, Chris LaClair, Avi Yashchin, John H. Austin, Jr., OnlineBookClub.org, Dmitry Kuzmichev, Matthew Gonzalez, Eric Sexton, john kiehl, Anton Ragin, Diffbot, Micah Mangione, MJP, Gnare, Dave Kircher, Burt Humburg, Blake Byers, Dumky, Evgeny Skvortsov, Meekay, Bill Linder, Paul Peijzel, Josh Hibschman, Mac Malkawi, Michael Schneider, jim buckmaster, Juan Benet, Ruslan Khroma, Robert Blum, Richard Sundvall, Lee Redden, Vincent, Stephen Wilcox, Marinus Kuivenhoven, Clayton Greenwell, Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi, Ron Neal

Written by Derek Muller and Petr Lebedev
Edited by Trenton Oliver
Animation by Ivy Tello and Mike Radjabov
Filmed by Derek Muller and Petr Lebedev
Additional video/photos supplied by Getty Image
B-roll supplied by Stawell Gold Mine
Music from Epidemic Sound
Produced by Derek Muller, Petr Lebedev, and Emily Zhang



1 Haz 2022




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Emang Gitulah
Emang Gitulah 4 aylar önce
Had a good friend working for his PhD for the Italian side of the project. The material science is insane. They used copper from old sunken ships for a lot of the hardware, because it is way less contaminated with radiation. Super interesting projects and marvelous engineering
Name 24 gün önce
the title was right, this really *is* an absurd search. so many bizarre steps steps to take and things to minimize
Niall McArdle
Niall McArdle 29 gün önce
@Emang Gitulah: Mama mia!
Shawn 186
Shawn 186 Aylar önce
You are absolutely right....at SLAC National Accelerator Laboratory we have steel from ships that were sunk at Peal Harbor. (Pre Nuclear Testing)
Moms Spaghetti
Moms Spaghetti Aylar önce
Holy hell there's so many shipwrecks with copper leftover from the disasters and World Wars. I imagine what the logistics it takes to move that material from a to b, process it and then use it for a fancy doo dad like what your friend is working in.
Vlad Dracul
Vlad Dracul Aylar önce
"Anytime an astrophysicist puts the word dark in front of something it means we have no idea what we're talking about" -Neil DeGrasse Tyson
Hakasays 19 gün önce
Assuming matter is actually a fairly big stretch though. You could call it dark magnetism or dark dielectricity and solve the formulas in the exact same way.
pyropulse 19 gün önce
@Philip O'Carroll The observations do not imply matter we cannot see; the mathematics imply matter we cannot see. Observation just shows stuff happening; you cannot make an observation that shows something doesn't exist; it would be like saying "I observed nothing, therefore this nothing exists because my math says it does."
Wolfette Plays
Wolfette Plays 21 gün önce
Well he’s pretty dark himself sooo 😂
Victor Popescu
Victor Popescu 24 gün önce
@ratemisia! And dark energy
M. P.
M. P. 26 gün önce
Astrophysicist: Let's go for a pint or two of good dark beer, Neil! Neil Tyson: I have no idea what you are talking about.
Jon3s3n 2 aylar önce
As a german, the way you pronounced "Dunkle Materie" made me laugh out loud, it literally translates to "dark matter" btw.
Kirill Burtsev
Kirill Burtsev 6 gün önce
@Charles Bosse We are not talking about pronouncing perfectly. But at least don't read it as if it was English when you know it is not English. 10 seconds of googling and you can pronounce it much closer to how it sounds in German.
Karol H.
Karol H. 13 gün önce
I cringed at the pronunciation . It's not even close or not even trying.
pyropulse 19 gün önce
Dude, everyone knows it literally translates to dark matter without even having to know german...... btw
uhohoverflow Aylar önce
@Charles Bosse We are talking about English/German here. All of the phonemes necessary for properly pronouncing "Dunkle Materie" are there in the English language. Derek's level of production justify seeking native speaker's advice. He osn't being dragged on stage where he has to perform from the get-go. He can try saying "Doonkluh Matéri-uh" three times and the native speaker will say "close enough" to one attempt. Derek is in the position to get such guidance for free, if need be.
TheFatMan7777 Aylar önce
Ein Dunkles Bitte!
kesh Kumar
kesh Kumar 2 aylar önce
Would like to say thank you to the team at Italy for collecting this data they were just showing us 20 years of data in two minutes shout out to you guys were the real heroes of the story
RandomDude85 2 aylar önce
Imagine a dark standard model, dark particles that interact with other dark particles but never with ours. In the same space that our universe occupies, there could exist a dark universe with dark stars, dark planets etc. There could be a being made of dark matter standing in front of you and neither of you would know it
MineTech48 24 gün önce
@Danny Darkense huh, thanks for that. I must have missed this part. Glad to know I wasn't alone in that thought.
Larka Aylar önce
Interesting, how accurate you are. but also you have to inverse it.
C. DL.
C. DL. Aylar önce
Didn’t anti matter already explain this? And we actually have more reason to believe anti matter is a thing
Danny Darkense
Danny Darkense Aylar önce
This is where my mind goes when the subject of dark matter arises. I guess we fall into the "extra dimensions" subset. 10:05
Cody Botterbrodt
Cody Botterbrodt Aylar önce
@SFS All great theories started as psuedoscience. It isn't rigid empirical study that drives the future, it's that exact kind of open mindedness and creativity. I'm sure someone in the 1400s said the same thing you just did about heliocentric earth, or to Aristotle about his theory of "atoms"
Better Chapter
Better Chapter 4 aylar önce
The deeper you dive into physics and cosmology the freakier it gets.
Alexandre Kassiantchouk
"Simple quantum explanation of gravity without mass or math" 4min video gives true answer
You must be talking about the wierd fact that Australia is NOT really real. Yup I'm Not just joking and I don't want to hurt anyone but I will if I feel like it okay slugger??Yeah dude I will...
Gianni Piccioni
Gianni Piccioni Aylar önce
@wilson rawlin I'll believe in a god once you can prove it. Your books are not a good enough proof.
wilson rawlin
wilson rawlin Aylar önce
@Gianni Piccioni Beyond our understanding doesn't change the reality that God created everything. You choose to go out of your way to deny the existence of God vs any other option for the existence of the universe/life. Your choice and you own it. If you're wrong, you will live an eternity of regret. Have a nice day.
32shumble 2 aylar önce
The dark matter conjecture always reminds me of the 'ether' conjecture. A substance called ether/aether was formerly believed to fill the upper regions of space to explain the propagation of electromagnetic and gravitational forces.
32shumble 19 gün önce
@pyropulse I think of maths as a tool for all scientists
pyropulse 19 gün önce
@32shumble That's how I think of physics, as a subset of mathematics
32shumble 19 gün önce
@pyropulse I read Physics as part of my Maths degree. I also have a physics book from the early fifties that presents ether as a real thing - later books don't. Theories come and sometimes theories go, that's how science works.
pyropulse 19 gün önce
@Nick St Michelson/Morley did not disprove the Ether. It makes no sense why people say this
pyropulse 19 gün önce
The ether theory actually passes all the 11 experiments that special relativity does, so the ether could actually exist. Einstein merely came up with a mathematical theory that doesn't use it that also fits observation, so people just says it doesn't exist, which is weird, because physics is supposed to have physical causes, not magical mathematical ones. In SR, there is no physical cause, just abstract mathematics causing stuff to happen while in ether theories, the ether obviously causes it. You learn this stuff in higher level physics courses, or if you are curious enough to study this on your own In fact, almost all the equations for SR are ether equations; Lorentz derived E=mc^2 and all that stuff himself
Ashurean Aylar önce
14:14 I'm with this guy, it'd be really exciting if we ended discovering a whole new family of particles, but since they apparently don't interact with each other very strongly, the chance of anything showing up that isn't a fundamental-level particle is low.
pyropulse 19 gün önce
@Stephen Holt we don't know anything about dark matter. We don't even know if it exists. There are other hypothesis that explain the galaxy rotation curves, and make other valid predictions, and it doesn't rely on dark matter existing
Stephen Holt
Stephen Holt Aylar önce
I don't know - I'd say we know so little about dark matter at present that we can't rule out some exotic interactions between its particles other than just gravity. The simplest explanation is that it's bland and uniform, but that's not the only solution to what we see...
kes4175 2 aylar önce
You produce the best, on point examples (graphics, cutaways, interview excerpts, etc). How many people does it take to produce a video of this quality?.
Okabe Rintaro
Okabe Rintaro 2 aylar önce
I love the ideas from both non reductive and reductive physicalism. It questions our senses but also reinforces the ideas that the logic of the physical world is fairly constant.
Tracy Trawick
Tracy Trawick 3 aylar önce
I normally watch you on my phone. But yesterday I walk in our living room and there you are in big screen TV, my grandson watching & listening to your every word! That's when we found out we both followed you on TRvid! Your def multi-multi-gen, he's 11, I'm 63 - and we now watch together during his annual summer vacation with us! Great work! Priceless memories and conversations!
Dylan Dutson
Dylan Dutson Aylar önce
@ApexOfThrottle "Space videos" is almost synonymous with Kurzgesagt for her lol
Izzy PlusPlusPlus
Izzy PlusPlusPlus Aylar önce
@KC Belgian Mine at 64.
KC Belgian
KC Belgian Aylar önce
@SoppingClam my dad died at 72
Maverick Hill
Maverick Hill Aylar önce
Rock on Nanna.
JSGV Aylar önce
Coopierre Aylar önce
Quick thought: When you mentioned how dark matter only interacts with things through gravity, it got me thinking about the quantum theory of gravity and the theoretical graviton. If we can directly detect dark matter, then it could in theory also prove the existence of the graviton particle and create a quantum theory of gravity.
glasco61 Aylar önce
I find myself completely agnostic regarding the outcome of the experiment. I find the joy in the doing of the science. So many disciplines involved & so many facets of the problem that need to be addressed. In some way it feels like a social experiment, where we, humanity, learn a little humility as we learn there are still things we don't know yet
Bogdan Kaludjerovic
Bogdan Kaludjerovic 2 aylar önce
8:20 Genuine question: How can we observe that? Shouldn’t that take like billions of years and we couldn’t see the process that quickly (as in our lifespans)?
Bill Windsor
Bill Windsor 2 aylar önce
@Christopher Cappiello Thank you for your writeup here. I have read in the popular science literature about dark matter with the Bullet Galaxy (Abell 4067) and the Musket Ball Cluster, from the Chandra X-Ray Telescope research, and your notes amplify these concepts. Your research sounds fascinating 🏅🏅.
Christopher Cappiello
Christopher Cappiello 2 aylar önce
@Kaiden Cameron Nope! It's something totally different. We know that galaxies have gots of gas and dust in them, but those things interact with visible light and other kinds of radiation. Dark matter is something that light passes right through--hence the name. We think that dark matter is something that isn't contained in the standard model of particle physics, i.e. it's something different from the protons, neutrons, electrons, and other particles that we're familiar with.
Kaiden Cameron
Kaiden Cameron 2 aylar önce
@Christopher Cappiello is dark matter just gasses?
Christopher Cappiello
Christopher Cappiello 2 aylar önce
physicist here (I actually study dark matter lol). You're right that we don't see these clusters moving together/through each other in the way that the video is showing. What we actually see is just clumps of gas in the center, with the strongest gravitational lensing coming from regions to either side of the gas. The whole structure looks stationary on the scale of human lifetimes. However, we can see shock fronts in the gas (regions of high density, like a sonic boom), which result when two masses of gas collide with each other at high velocity. So from the temperature and/or density of the gas, you can determine the strength of the shock, and figure out how fast they were moving toward each other
Ephrem Cortvrint
Ephrem Cortvrint 2 aylar önce
Not an astronomer, but I would theorize they concluded that by having examples of a collision in all the different phases found elsewhere and with that they can infer where it is in the process. Take aging, imagine you see 100 pictures of 100 different people, and the pictures are taken at a different age every time. Even though you haven’t seen someone become older, you could guess at what aging is.
Stellar Spas
Stellar Spas Aylar önce
My knowledge of particle physics is basic, so,..simple question: Is the theory of the existence of dark matter solely based on the observation of spiral galaxies inner and outer stars (or light matter?) speed of rotation, that the speeds are inconsistent with calculations or otherwise expected speeds? If so, this may be a super naive question, but if the supposition is made that the unexpected rotation speeds would make sense if the amount of matter was higher, however since unobservable visually, must be "invisible". Wouldn't invisible be different than dark? Am I being too picky, or wouldn't invisible suggest an element of unknown physical characteristics, causing them to be imperceptible even if very close? Couldn't it be that the "regular" matter that makes up planets, might also appear invisible, but only because anything that isn't an illuminated star couldn't be visible from such a distance? Might be a no-brainer question for an astrophysicist, but curious why the astrophysics community eliminated the possibility that the visually unobservable matter likely responsible for the unusual spiral speeds isn't attributable to the galaxy's population of planets among the stars, whose presence has the spiral speeds in line with expected if/when including the presence of planets.
Josh Binder
Josh Binder 4 aylar önce
Here's to hoping we get a dark matter detection in our lifetime! Cheers
Anatoli Strilchuk
Anatoli Strilchuk 29 gün önce
@Dorijan T bj
Vatsalya Sharan
Vatsalya Sharan Aylar önce
@Christien Sebastien Dark matter doesn't clump that easily, therefore you don't observe it as smaller scales. When you bring in normal particles, they lose energy and clump together. In case of dark matter, that doesn't happen as much as for normal matter.
Marc Colten
Marc Colten Aylar önce
Your lifetime, maybe. Mine, eh.
Ifbfmto Aylar önce
@Diablo The Cheater I’m not in any way opposed to exploring/experimenting My main issue is that the ‘media’ has I think, taken the ‘certainty’ of dark matter, and what that means, a little bit too far The astronomical evidence overwhelmingly suggests there is a significant amount of matter that can’t be accounted for, so if you want to call that dark matter, sure But again, is this an entirely new hypothetical class of particles that doesn’t interact with ‘normal’ matter or light in any way other than through gravity? That’s an idea, that’s a possibility, it MIGHT even be the ‘most likely’ explanation we can yet come up with, but there isn’t any real evidence for this (yet) so frankly we don’t know 🤷🏼‍♂️
Diablo The Cheater
Diablo The Cheater Aylar önce
@Ifbfmto a completely wrong dead end is useful in its own way, you have no reason to believe anything is correct tbf, but when doing science is better to go with the theory you can actually do stuff to prove it correctly or incorrectly than the one you can't prove. Dark matter being just hard to detect matter is the easier explanation and the only one we could have a hope of testing correct or incorrect currently, so it is the accepted one. Science is less about believing and is more about probability and capability to experiment. Experiments to prove if hard to detect matter exist are possible to do, so we do them, we can't really experiment to get a new completly revolutionary sets of physics, for that takes a special kind of person and the addecuate level of technology. So we experiment in what we can, both to demostrate if it is right or if it is wrong, both are completly valid results.
Teru teru bouzu
Teru teru bouzu 2 aylar önce
'By denying scientific principles, one can maintain any paradox.' Galileo pretty much defining the cult of modern science.
Thomas Maiden
Thomas Maiden 2 aylar önce
"Zoe the Robot" always enjoys a good VERITASIUM video. Now I am planning to see if adding motor inhibit relays may be a good idea, to prevent the robot from jumping when power is first applied to her drivers. While Zoe's A.I. system is quite complex, she could benefit from additional programming.
Andrelopithecus Aylar önce
I honestly think there’s an alternate theory of gravity. There’s some constant or something that is negligible or zero in most cases but is inflated based on certain factors ... also because quantum gravity and classical gravity don’t line up. I find it likely we have something wrong there, and it’s probably at the same point.
DStecks Aylar önce
The problem is that there are a lot of observations that are very cleanly explained by dark matter but would be bizarre if our theory of gravity is wrong. Like the bullet cluster, as mentioned in this very video. EDIT: I should say, our theory of gravity is definitely wrong, it's irreconcilable with quantum mechanics, but dark matter still definitely exists and no serious theory of quantum gravity attempts to explain it away.
Shaii ❱•❰
Shaii ❱•❰ Aylar önce
Same idea behind the (non)-existence of the planet Vulcan.
Viatorina Aylar önce
Sometimes the experiments that open up new avenues are the ones that posit the wrong hypothesis. This one eerily reminds me of the Michelson-Morley experiment, which was intended to prove light spreads through a medium of "luminiferous aether", and that lightwaves would travel at different speeds depending on Earth's movement through it. The experiment completely negated that notion and opened up the way for more research, leading to Einstein's theory of relativity. Even if we don't detect dark matter, perhapse we can still get some new interesting theories out of it. :)
Andrelopithecus Aylar önce
@Toksyuryel my theory? There is ONLY quantum gravity. We just observe it through a black box at the moment and know how it works most of the time.
Toksyuryel Aylar önce
It's not even the first time this has happened- Newton's theory of gravity had us hunting down a phantom "planet Vulcan" to explain Mercury's orbit until Einstein came along with a better theory. Dark Matter could just be the new planet Vulcan and once we figure out quantum gravity we'll know what's actually going on.
Andrew Wiggin
Andrew Wiggin Aylar önce
I've never been a big believer in dsrk matter. It seems more reasonable to me to assume that general relativity represents an incomplete theory of the macroscopic universe. I don't find the evidence for dark matter to be very compelling.
Semaj_502 4 aylar önce
"But at least we tried." What a great moment to end the video. That we may never discover the answer to some of our biggest questions, yet try anyway, is the core essence of scientific inquiry.
Supernatural Forces
@Thomas Neal Okay! Can you please recommend me the best Disney movie? Which is the best Hollywood movie?
Semaj_502 Aylar önce
@MikehMike01 How is it point less?
MikehMike01 Aylar önce
What a great way to waste money on pointless research
Tim Q
Tim Q Aylar önce
can't LQG answer some of these questions? Instead of missing particles, there are just pockets of higher concentrations of gravity. Gravity is the AVERAGE of F = ma, but are there any experiments to determine if that average is determined by noticeable variations?
michel plamondon
michel plamondon 2 aylar önce
in that case could we hypothesize that there might be some exotic dark matter that could interact with normal matter. is there the equivalent of frame dragging when we pass through dark matter?are we a by-product of dark matter, dark matter that when it "decays" it gives us the particles of the visible world? or speeds up? is there the equivalent of cosmic expansion in dark matter?
Kairon156 2 aylar önce
While I do understand the theory of dark matter it's never sat right with me. I like the idea of there being a ceiling or maximum effect gravity has similar to the speed of light. Or maybe objects can somehow create excess gravity when sharing orbits and stuff.
Montafn 2 aylar önce
Great video! Just something I noticed, Dunkle Materie isn’t (only) the origin for the term Dark Matter, but it is a literal translation thereof.
The other John Smith
The other John Smith 4 aylar önce
It never stops to amaze me how one can build a detector for particles when we don't know what those particles are. It's like telling a person from the stone age to go and find metal.
Jay 21 saatler önce
They don't know they are detecting dark matter it's just an assumption. Dark matter could actually be 100 million different types of elements unknown to us that we can't even perceive could be 4 dimensional or 5, 6, 7, 8, 9, 10 dimensional if you refer to string theory. I prefer to think of our dimension as something we cannot comprehend.
Michael Scharen
Michael Scharen 6 gün önce
The predominant form of matter in the universe is not ‘gas’ but plasma which behaves in fundamentally different ways. The attraction of charged particles is 10 E36 x that of gravity.
Tryctan2 13 gün önce
@Hinsberg Reagent dark tech sounds like something out of starwars
Deedee Mao
Deedee Mao 15 gün önce
​@morrow you can see the light emitted by the fire with eyes closed also, but yeah maybe not being. at the very least being blind to those spectrums.
Deedee Mao
Deedee Mao 15 gün önce
yet metal they did find n master, well at least efficient to the point of molding those metals for human use.
mzma Aylar önce
There must be another theory that would sound about like this: Our universe is multidimensional. Matter is also multidimensional. What we're experiencing is mostly limited to _a_ 4D spacetime. Hence models have been conceived to satisfy limited 4D observations. But if we viewed 4D spacetime as a plane of a 5 (or more) dimensional spacetime, then imagine the 4D objects we interact with - 5D (at least) and the mass that resides over and under the plane - shaping the spacetime around them, hence "altering" the gravity they exert. So there's not any new, exotic, matter but our good ole' bodies have different gravity "shapes" depending on their 5+D shapes and sizes. Not to mention bodies that don't intersect the plane. The reason the gravity "anomaly" only manifests at cosmic scale, is probably because bodies are relatively orders of magnitude stretched/elongated in the 5th dimension than in the perceived 4D spacetime. And particles coming into/out of existence in fact cross through our plane via translation/rotation. The downside is the (apparent) impossibility to detect or get a sense of what's outside the box, from within the box. But you should take note of the slight morphing of cosmic sized bodies that reveal rotation (and at a lesser degree translation) in the 5+D'th dimension.
Thomas Cain
Thomas Cain Aylar önce
2 questions: 1. You mention a couple times that the belief is dark matter only interacts with other matter through gravity. The experiment as you describe it seems like an interaction other than gravitational (i.e. the dark matter will "hit" the sodium-iodine). Am I incorrect in thinking that? 2. The special paint coating on the wall in the cavern to contain radon...is that just lead paint?
Shaii ❱•❰
Shaii ❱•❰ Aylar önce
@sorsocksfake Except the invisible man is floating
sorsocksfake Aylar önce
@rutger5000 To the contrary, that's what the experiment is for. The hypothesis is that it does interact, but extremely rarely. So we wouldn't notice it among all the things that do regularly interact. The experiment takes away all the things that regularly interact, hopefully leaving us with only those weakly interacting things, if they'd be so kind to pop up. Kinda like trying to catch the invisible man stealing our sandwiches by sprinkiing flour all over the room and getting everybody out.
anon Aylar önce
@rutger5000 much of this bleeding edge physics theories are unfalsifiable, competing hypothesis that can be proven but not disproven. Once one is proven, the search is pretty much over.
Thomas Cain
Thomas Cain Aylar önce
@Meboy1000 Thank you!
rutger5000 Aylar önce
@Meboy1000 I figured, but come on that's just being apologetic. That no longer is proper science. It's accounting for your observations without theory that can be falsified.
KosmiCality 2 aylar önce
I like how articulated they are about a subject that we don't know exactly about.Still they know the answer to what,why,how,if not,what if,if etc. Here me who even after knowing answer to question can't articulate and be precise. Truly Role models!
Emiliano Ferreri
Emiliano Ferreri Aylar önce
14:25 so this raises a question of my own. Does this mean that there could be dark matter "beings"? And if so could dark matter and "normal" matter beings interact?
Virtual Riot
Virtual Riot 3 aylar önce
But if the stars in the galaxy need that extra mass, supposedly coming from dark matter, to stay in their orbit at the measured speed, how can we take into account the amount of mass inside of the (supposed) supermassive black holes at the center of galaxies? Do we have a way of measuring that mass? Can we compare if things orbiting smaller black holes exhibit a similar behavior? I am by no means an expert on this field, I was just wondering if that extra mass we're looking for could be from the black hole at the galaxy center (unless we've successfully measured that, then please never mind my suggestion ^^)
Merennulli 3 aylar önce
@Tasty We have seen the matter being pulled in. And if it was spewing matter, it would be very visible. EDIT: So I get a "citation please" reply and then all posts by "Shina" are missing when I click to see the context. I'm going to write this off as yet another troll account. Forewarning to any other trolls, you don't get to use demands for citation as a dismissal anymore. That BS worked last decade but we're not biting anymore. You just blow off whatever sources we provide, so it's not meaningful to actually provide them for you, and this is a conversation, not a term paper. And that's without even getting into the fact that TRvid throws posts with external links into limbo for anywhere from minutes to months with seemingly no rhyme or reason to it. If you legitimately wanted a source, ask politely and indicate what you want it for. TRvid doesn't tell us what comment you're replying to, and 90% of the time more than one thing was said. So if you want to know a source for something, mention what something it is. eg. "You said water is wet, but I couldn't find any information to support that claim. Could you please point me to where you got that information?"
Ishaan Upreti
Ishaan Upreti 3 aylar önce
@Merennulli Who said it will pass through Earth ?
Merennulli 3 aylar önce
@Ishaan Upreti A thermal radiation source smaller than an atom (when it's that far gone) moving constantly, that can pass right through the earth would at best look like your thermal sensor had a minor glitch that never repeats, and the odds of it happening even once are astronomical.
Ishaan Upreti
Ishaan Upreti 3 aylar önce
@Aaron Lowe But black holes influence things by gravity, and dark matter interacts with gravity.
RSJ1984 2 aylar önce
Could you look into/interview Eric Verline on emergent/entropic gravity? The search for dark matter gets a whole new meaning when seen from that perspective. Why would general relativity be complete and consistent?, what does it say about us that we think our theories must hold and point to absolute truth?
bob gade
bob gade Aylar önce
As with my theory of black holes being an overgrow binary orbit combining mass for gravitational pull, I believe "dark mater"/"antimatter" to be the catalyst to stabilize a particular reaction, such as steel wool and a 9 volt inside a vaccume
sam knutson
sam knutson 2 aylar önce
What would cause matter careening through a near vacuum to slow down? It seems like there is an assumption of resistance beyond or in addition to gravity. The models we have for how movement within our own solar system don't function realistically. Why would we be in any way troubled to create a solution for errors in gravitational estimations at a scale billions of times larger that the distances and masses we clearly don't understand about our local bodies. "It may elude us", indeed.
Eric W
Eric W Aylar önce
We understand movement through our own solar system pretty well. Errors really only come out of position and velocity measurements having a limit of how precise they can get, and how greatly those little differences multiply over time. Also, are you talking about the Bullet Cluster bit about matter slowing down? Interstellar gases actually interact quite a bit. We've got a ton of nebula pics that show that.
Corvus Glaive
Corvus Glaive 2 aylar önce
0:12 Took 30min to travel 1km means 2km/hour, human walking speed is 5km/hour. It looks faster then that. Heh! so happy. See I am learning from your videos :)
Roxor128 3 aylar önce
"It may elude us, but at least we tried." The essence of science in one sentence!
robert fish
robert fish Aylar önce
@Thomas Neal That doesn't explain why the consensus rules. Your training is to work in groups. Follow the leader stuff. Where as the notion that science is above all that, standing noble in the face of pressures, is certainly not expressed by the obvious gap between what you believe and what is presented.
KryptonKr Aylar önce
@Thomas Neal Nope, there is hard evidence for the existence of God. The scriptures provides the evidences. One example is the Rosetta Stone’s discovery proves one of the cases to be true and there’s a lot of cases that piles up so much so that it’s ridiculous to deny it. God does exist. It’s not something I believe, it’s something I know based on evidences. I do not blindly believe in a God like most theist do. I have actual knowledge for this
Thomas Neal
Thomas Neal Aylar önce
@robert fish "The essence of science is consensus" it's exactly the opposite. we are trained to spend most of our efforts attempting to DISPROVE the currently accepted hypotheses. the reason theories form in science, is because of so many of us attempting to DISPROVE their supporting hypotheses, and fail to do so. you fundamentally misunderstand the function of science at a very basic level.
Thomas Neal
Thomas Neal Aylar önce
@KryptonKr " the whole concept of God is ..." just that, a concept proposed by HUMANS. when will the religious ever finally admit this?
jim b
jim b 2 aylar önce
often, discoveries are accidental, when something isnt behaving the way it "should". in those instances, something unrelated, or so we believe, is being tried.
Johny40Se7en Aylar önce
I have a theory about dark matter. You know when we experience de ja vu, I believe that it's us in this reality, having a quick flash from our other selves in another reality, which is slightly ahead of our reality in terms of time. Dark matter is the kind of fabric between realities, and just like fabric of a jacket, it wears thin in certain places every so often, like at the elbow. "Kid, who does the doctor treat?" - "Patients". "You see the elbow of my jacket, what's it doing?" - "Wearing thin?". "Bingo!" 😆🤭😅 Where dark matter is at its thinnest, that is where de ja vu is most likely to occur, because of the unintentional cross over of information from an event that's already taken place. And dark matter's what separates the realities. Without it, it would probably be like an episode from Rick & Morty or Stargate SG-1, when they travel to different timelines but then they start to interlock with one and other. But hey, just a theory, and just like elbows, and ass holes, everyone's got opinions and theories 😝 Super cool topic 😊🥰
Sean Meehan
Sean Meehan Aylar önce
This was really fun to watch and I'll bet it was amazing to make.
Ken Brady
Ken Brady Aylar önce
I love your work in general, but the animations of stars spinning in galaxies and galaxies gyrating about their clusters are impressively fast. In fact, we can barely see these things move at all, and the only way we observe their velocities is via their relative Doppler shifts.
ikasuki1 Aylar önce
Not only is this extremly interesting but the editing is top tier. 15 min flew through and at the end I was asking for more… when some video are not even 10 min long and feels like eternity even though they talk about subjeçt that interest me… great job 👍
Lost in Play
Lost in Play 4 aylar önce
It's comforting to know that this kind of research is being done. The kind that doesn't have any clear economic purpose, but instead is just for the sake of the pursuit of knowledge.
Thomas Neal
Thomas Neal Aylar önce
@Pluto : " then care to explain life and consciousness using “classical” science" I won't, but I WILL explain that what you are saying amounts to nothing less than expressing your own ignorance, and then claiming your ignorance is only explained by hypothesizing the existence of a deity. nothing more than the god of the gaps argument. you can stop now. you have failed basic science.
C22 R21
C22 R21 3 aylar önce
Well the economic purpose will show its self when we understand how to use the dark matter maybe somewhat like fuel to intergallactic travel without fossils well i hear there is a comet after mars worth 38 trillion thats orbiting around our sun
Angela Lewis
Angela Lewis Aylar önce
My favorite thing in this video is that among the tests for dark matter listed, two of them are “Edelweiss III” and “Tesseract.” 😆
Corinne Ng
Corinne Ng Aylar önce
I like those names too
樂 天 Bradley
樂 天 Bradley Aylar önce
June is when you get the solstices. It's like asking "what opens the portal" it's like a combination lock with the solar system. Everything is all interconnected but you're trying to explain a part or component of the whole. You don't modify anything. You take measurements with tools so that you can see what you cannot. He said if God gave him the great book of physics part A and B LoL The Golden Ratio is when you divide a line into two parts and the longer part (a) divided by the smaller part (b) is equal to the sum of (a) + (b) divided by (a), which both equal 1.618 November to June is when half the seasons are. They're just measuring the planet through space. It's just yin and yang. Positive and negative.
Flo&So 2 aylar önce
just amazing! thank you so much for the video and thank you to everyone who made it possible!
Grant Allard
Grant Allard Aylar önce
I've been following the dark energy/dark matter theories and experiments since the first discoveries about them, plus the incomplete story of gravity. I'm good with dark energy, but am less confident with dark matter. Gravity: For all the explanations of what gravity is and how it works and talk of gravitational waves, something is missing. I'm not satisfied after reading many articles/papers and watching countless videos on gravity. At the end of each I'm asking "Is that it?" Am I alone in this dilemma?
Donald Westrope
Donald Westrope Aylar önce
Not alone for sure. Gravity just doesn't work. As I just said in another comment: smoke goes up, not down. If "gravity" held planets in circuilar motion (so strong) why could it not pull some smoke down. Toroidal/electric/magnetic forces as a basis for why buoyancy trumps would be the thing to pursue.
Artyom 4 aylar önce
Fascinating! Also, whoever is doing the visuals for Veritasium is doing an amazing job! The charts, the 3D models, and the animations look extremely well-done and really help you to understand the idea behind it. Cheers! Edit: thanks for the grammar lesson
Loplop Ploplo
Loplop Ploplo 3 aylar önce
@hunter ...... No, I'm a realist, not a fantasist
Loplop Ploplo
Loplop Ploplo 3 aylar önce
@curly dude .....Yawn
hunter 3 aylar önce
Do you believe in a god?
Grant Gryczan
Grant Gryczan 4 aylar önce
@curly dude To be clear, "good" cannot simply be used in place of "well", because "good" is an adjective while "well" is both an adjective and an adverb. As an adverb, "well" should be used instead of "good", like "He plays well" or "I did well on my quiz." "He plays good" and "I did good on my quiz" are incorrect because "good" is not an adverb (though you'll still hear "good" used as an adverb somewhat often despite that, even from native speakers).
Brice Lory
Brice Lory Aylar önce
I'm not gonna lie, dark matter really feels like an explanation that could be developed under the Ptolemic model of the universe to describe why some of the orbits didn't match the model before the model itself was found to be wrong. In other words, it has the feeling of a materialist god of the gap.
TheExplodingChipmunk 20 gün önce
@Wolfette Plays Thats nothing but a polemic and grossly false lie.
TheExplodingChipmunk 20 gün önce
@Shaii ❱•❰ It might be to you, but that is subjective. The facts we have very strongly imply it is some form of matter and not directly connected to other stuff. The main point being that it exists without needing any notmal matter, such making it extremely unlikely just to be an artifact. And why is the idea that it does not interact with notmal matter (or so weakly its basically undetectable) so out there? Neutrinos also interact extremely weakly. So much that the vast majority of them just pass straight through the planet.
Shaii ❱•❰
Shaii ❱•❰ 20 gün önce
​@TheExplodingChipmunk I may not be a quantum physicist, but the idea that there's some form of matter floating around out there that exists completely separate from everything else, and only interacts specifically through gravity, yet composes the overwhelming majority of all matter in the universe, is a little ridiculous sounding to me. I think dark matter must be an artefact of our current incompatible theories, and that we'll only be able to know what's causing its effects once we have a unified theory of everything that includes gravity.
Shaii ❱•❰
Shaii ❱•❰ 20 gün önce
@Wolfette Plays Literally not possible due to the very nature of the scientific method. If it was a scam you wouldn't be able to reproduce the results yourself, which is a fundamental trait of a correct hypothesis.
BaXaZZZ Aylar önce
What about Plasma Cosmology? It explains all the physical properties of the universe in a more elegant way with out a need of any magical hypothetical matter that likes to hide away in the dark. It would be honestly interesting to see an episode of Veritasium on the Topic of Plasma Cosmology, even if it would be on attempting to disprove the theory. I am a long time fan of the Channel, Thank you for what you do.
Sophia Herschel
Sophia Herschel Aylar önce
I once was a big fan of yours, but with increasing follower numbers you got flatter and more focused on entertainment than educating and informing. From "The Guardian" to "The Sun". I think it describes the demise of your channel pretty well.
Ricardo Adonis Caraccioli Abrego
I have a theory that can explain dark matter, but I need the go-ahead from a physicist like you to validate it.
Miguel Galdiano
Miguel Galdiano 3 aylar önce
Man, I just need to take a minute here. I’m physics graduate and at one time in my life, very recently actually, I used to want to be a scientist. When the time came around for me to choose my Masters, I chose to study Dark Matter. It was almost my whole life for nearly three years, but academia just wasn’t for me. Coupled with the pandemic, I quit for the sake of my mental health and am much happier now, but man. Hearing all the names of the experiments, of the physicists involved, the history and development of the theory… It takes me back you know? I still love physics, I still admired it and I still understand it. In a way, I miss it, but I don’t think I want to be a scientist. I’m happy just reading articles every now and then, remembering what I spent years studying, revisiting a huge part of my life. I kind of lost track here. Anyway, I just wanted to say thank you for the video. It almost feels like one last visit before leaving a place I know I’ll never be in again. Thanks
Mr Sprite
Mr Sprite 3 aylar önce
I also love physics since birth but it seems like physics don't love me. It's hurts in one sided love but I also can't help it because physics is too interesting to leave it.
supermendi007 3 aylar önce
Man I feel you…like crazy. I’m about to finish my degree in Physics, and yet I know I’m not gonna be dedicating myself to this kind of research, at least not in the theoretical part of Physics, I might try to get a job doing some research on the new generation solar panels, or anything involved with nanotechnology since it’s more tangible and I enjoy it a lot more, still, for the sake of my mental health and happiness I’ll be leaving all this behind and I’ll pursue a pilot career, which is what I actually do best and enjoy the most by far, hopefully I’ll be able to get some decent money to be able to do my own experiments as well since funding seems so ridiculously hard to get these days, people with money out there surely have no idea just how hard doing Physics really is nowadays, I’m glad these kind of videos shed some light on a tiny % of the actual challenges involved, perhaps it’ll help make people appreciate more just how hard the life of a scientist can be.
Paul Bizard
Paul Bizard 3 aylar önce
@xxxYYZxxx Have you ever considered appearing on the Gong Show?
John Dough
John Dough 3 aylar önce
@Paul Bizard lmfao dang that’s hilarious, you all are ROASTING that Iraqi Lobster. Too funny
Warriormon87 2 aylar önce
What seems more likely than Dark Matter existing is that we are wrong about the way we measure cosmic distances. If distances are different than what we think they are, then there is no need for dark matter.
AllWheelDrive Aylar önce
Good one. Thanks! It's refreshing to see more scientists embrace the ideas that we really don't know much now, and are most likely to fully answer so many of the biggest questions. I think the relatively rapid pace of what we consider significant discoveries has given us a new, more open, and healthier perspective on our unavoidable human limitations. It also seems to be bringing back a reverence for our existence, more like our ancient ancestors experienced. What has seemed to us to be backward and elementary is quite the opposite. We've chosen to dominate our environment rather than work in mutually beneficial harmony with it. Our human exceptionalism just tossed aside the importance of our inextricable relationship to literally everything.
Random 2 aylar önce
Scientists: Dark matter, an intangible matter that only interacts through gravity Also scientists: uses tangible objects to measure dark matter
Francois Blondeau
Francois Blondeau Aylar önce
All calculations are made assuming that the speed of time flow is uniform, which by definition is inaccurate. The speed of time flow varies according to the amount of mass present in a given environment. The day we include this variable in the calculations, the quest for dark matter could become useless.
Nicolas Duguay
Nicolas Duguay 4 aylar önce
Sometimes I feel ashamed to be a human, but sometimes I watch a Veritasium video and pride comes back. The means deployed to find the secrets of our universe are amazing. And it takes so much humility to say "it may elude us, but at least we tried"
Sheep Ketchup
Sheep Ketchup 3 aylar önce
@B M as a company? No. As individual content creators? Yes.
The Starseeker
The Starseeker 3 aylar önce
Then you go to the comments and the shame returns.
Bose-Einstein 4 aylar önce
​@Echo.120 We are just like any other animal. The only difference is we hit the evolutionary lottery and have speech and a complex social system, which co-evolved/nessesated our bigger brains. Thinking we're anything more than a lucky animal is narcissistic. We are absolutely special, but only because we MADE ourselves special. For thousands of years, humanity had no technology, no culture, nothing except the ability to speak, make basic tools, and hunt in packs. Not much more advanced than a highly specialized ape on the grand scale of things. What we are now is because of tapped potential, and this was definitely not a certainty. So be proud of humanity: against all odds, we didn't die out, and we are here. Feeling shame will get us nowhere. Instead, recognize the issues we have BECAUSE we are just animals, because we're (individually) hunter-gatherers playing at civilization, and realize we need to change how to think about ourselves if we're ever going to move forward.
B M 4 aylar önce
@Echo.120 right now you're not using shame to strive for something better, rather to whine about how things are, as is usually the case of misanthropes.
Peter Telenko
Peter Telenko Aylar önce
Can you please explain why in the case of the colliding clusters we should expect that most of interacting gas would remain in between the clusters? I would expect very few of the atoms of gas to interact at all or be slowed down because they are so small and so far apart that the gas is nearly a perfect vacuum. Also gas clouds are tend to exist in clumps which means clumps are more likely to completely miss the other clumps entirely because there would be more gaps between the gas clouds.
Geodesic Interpolation
6:00 dude i love that dark matter analogy, specifically the water bottle. I've used this analogy before, but never with the water bottle component. Super clean and beautiful. Thanks.
Geodesic Interpolation
@Thomas Neal I appreciate the clarification, thank you.
Thomas Neal
Thomas Neal Aylar önce
technically, it's more like adding mass across all parts of the "star spinner" rather than just at the low point, but for a simple thing, it's ok.
Marge Aylar önce
When this theory first came out, I was really excited about it. As the years, failed experiments, and billions of dollars have gone by, I gotten to where I just don't believecin dark matter anymore. I do believe thatcsomething is missing from the calculations that we don't know about yet but it isn't dark matter as physicists have defined it. It is something bigger.
Vatsalya Sharan
Vatsalya Sharan Aylar önce
These Billions of dollars were used to provide employment to thousands of people plus advancement in technology which has its application elsewhere.
Terry Nokleby
Terry Nokleby Aylar önce
have they calculated the influence of electromagnetism in the universe to determine if that could account for the movements of these objects in space?
xSociety 3 aylar önce
"It may elude us, but at least we tried." That right there is what science is all about. Loved that quote.
David Douglas
David Douglas 2 aylar önce
$cience. this is a gigantic scam!!!!!
Bill Bauer
Bill Bauer 3 aylar önce
Yes, that's what science is about nowadays: The taxpayer financed our cushy jobs (= we got to try), and we don't have to show anything for it.
bich nguyen
bich nguyen 3 aylar önce
Danilo Oliveira
Danilo Oliveira 3 aylar önce
@bouboulroz lets not forget that the formula that basically made modern cryptography possible was made thinking it was just a interesting but ultimately useless math that had no practical application.
Dazanar 2 aylar önce
i love the hands on experiments you show us more basic minds so we can all get this.
CrazyFanaticMan 2 aylar önce
"Its an energy field, it surrounds us, penetrates us, it binds the galaxy together" - Obi Wan Kenobi
S. R.P
S. R.P 2 aylar önce
In the first example you were explaining... if the increased rotational velocity of particles outside the galaxy is because of extra invisible matter in the centre... wouldn't that make particles in the inner part to rotate even faster, which is not observed? making the explanation problematic
my namejeff
my namejeff Aylar önce
The whole dark matter debate makes me think of those videos about what a 2 dimensional being would see if a 3 dimensional object passed through. What if it is just the gravitational effects of 5th dimensional stuff, or something like that? Maybe the multiverse are layered on top of eachother, taking up the same space on different planes of existence. It is all so crazy, I can not think of much that is crazy enough to not even be possible. You could even make arguments that it could be proof of an afterlife and that life exists everywhere in the universe, seriously if you let yourself think that anything that can not be disproven is possible the ideas that could present themselves are truly insane. Dark matter and Dark energy such strange and unknowable seeming concepts that they begin to feel like faith arguments if you lack just a little bit of extra understanding of what is being discussed. Everyone lacks some level of understanding on it, that is kind of the point, but it really doesn't take much for everything to spin out of control.
EnricoV 4 aylar önce
Incredible video! Just a small detail: Gran Sasso (the mountain over DAMA/LIBRA) is not in the Italian Alps, but in another mountain range called the Apennines.
John Kennedy
John Kennedy Aylar önce
@R T you don't have to watch the whole video to point out a mistake? He didn't critique the content of the whole video, just pointed out an error at the beginning. Relax dude
aoi_midori Aylar önce
@Izzy Haase-Puissant Except that the place (and what we see in the video at 00:38) is quite far away from the Alps, it is actually near Rome. What you're saying is like telling people a total lie that some news happened in London because "not everybody knows Glasgow, more people knows London"
B3rtu Aylar önce
Grazie Enrico
R T Aylar önce
@KC Belgian It’s actually a pretty big deal. I believe in science! YOUR ATTACK IS NOT OK! Words have meaning. HONESTY MATTERS!
RAINE Tv Aylar önce
Actually that's just the massive gravitational effect of the unperceptible singularities energy and density at the center of galaxies depending on how the black hole itself was created The singularity can be a lot more energetic and thus a lot more dense
Jay Jenkins
Jay Jenkins 2 aylar önce
The dark matter we observe through gravitational effects is due to parallel realities that we cannot see or detect except by their gravity that bleeds through.
Greg Anikin
Greg Anikin 2 aylar önce
I love science… doing big work for big money exploring something not really matter to us And getting no results and asking for more money. I love it.
FaszomTelivanGecivel 2 aylar önce
Questioner: Is there any physical difference between first and second density? For instance, if I could see a second-density planet and a first-density planet side by side, in my present condition, could I see both of them? Would they be both visible? Ra: I am Ra. This is correct. All of the octave of your densities would be clearly visible were not the fourth through the seventh freely choosing not to be visible.
NuclearDude 3 aylar önce
"It may elude us. But at least we tried." And this statement alone should underpin everything we humans attempt in future. We learn more from our failures than we ever would with a success. Even knowing how something DOESN'T work is important. It closes off dead ends in learning and research. Every failure is important to learn from. Do not deride them, otherwise you avoid learning the real lessons.
GeorgeMonet 2 aylar önce
"Cutting off the reproductive organs of every human on Earth didn't give us super powers, but at least we tried."
Slevin Channel
Slevin Channel 3 aylar önce
@Jordan No. You being completly unaware of the struggles of the lgbtqai people is debunking their struggles exactly as much as flat earthers debunk the globe
Patrik 3 aylar önce
Oh, humans learn from failures? Climate crisis and corruption have entered the chat.
Sean Richardson
Sean Richardson 3 aylar önce
@Fel Anderis "Science sometimes tells me things I don't like, therefore science bad!" Talk about laughable...
Grey Cardinal
Grey Cardinal 2 aylar önce
what's stopping there from being a infinitely large set of particles that do not interact in any form with the set of particles we can observe, like having many universes overlapping over each other without a way to measure each other
Allan South
Allan South Aylar önce
When matter gathers due to gravity, as in galaxies or star systems, it usually forms a disc. If dark matter is only affected by gravity, why does it gather around galaxies in a spherical form and not a disc like all the other matter?
Shaii ❱•❰
Shaii ❱•❰ Aylar önce
Because gravity is wrong
Allan South
Allan South Aylar önce
@R P But the coalescence of galaxies is a gravitational interaction. The other three forces don't play any part in it.
Brandon fall
Brandon fall Aylar önce
@R P Measuring dust. Dust has density. Not dark matter.
R P Aylar önce
@Brandon fall It doesnt gather the same way because its literally missing 3 out of 4 of the fundamental interactions, and it most likely does exist, we can literally measure its density
Brandon fall
Brandon fall Aylar önce
Asking the real questions. Also it doesn't gather that way because it doesn't exist. Simple as that!
Loquetis 2 aylar önce
It is possible that there are "particles", forces, and energy in the fourth dimension (not counting time) that envelopes the entire universe in a highly organized manner. That would explain why we can't see them. Thus, if we can construct instruments that can detect things in the fourth dimension, then we would have the answers we seek. IMHO, I am completely convinced that dark matter and energy exists and it's just a matter of time before we figure out how to detect it's presence.
Folgrin 2 aylar önce
I’m leaning towards Modified Newtonian dynamics (MOND) at the moment. It’s more intuitive but the problem with it is human consciousness wasn’t designed to understand reality, so our intuition could be false when making these observations. Still the Dark Matter hypotheses is a tough pill to swallow, but it’s an interesting idea and I’m totally open to it. I hope this experiment gets us going in the right direction, exciting stuff!
Eric W
Eric W 2 aylar önce
I would still argue that Dark Matter as a concept is more intuitive than MOND. MOND essentially just states gravity stops following the inverse square law at low accelerations, but it doesn't propose a mechanism as to why (as far as I know). The lack of a physical explanation is pretty critical, because the inverse square law is both logically sound and one of the most fundamental parts of our understanding of all forces acting at great distances. As for dark matter, one of the big rules of thumb of the universe is that the more complex something is, the rarer it is (like the ratio of hydrogen vs. all other elements in the universe). Regular matter, AKA baryonic matter, is fairly complex in interacting with all four fundamental forces. It seems reasonable that on the way to creating regular matter, the universe could also have formed greater amounts of simpler matter. If this simpler matter just had the property of mass and missed the components causing regular matter to interact with EM fields, that's all you need for dark matter. I wonder if it would be more generally accepted if we had named it something else. My vote would have been protomatter.
ENCHANTMEN 3 aylar önce
I imagine scientists made out of dark matter are setting up similarly complicated experiments to try to detect this mythical "regular matter"
Spartan War118
Spartan War118 3 aylar önce
I mean they did just say dark matter doesn't even interact with itself, the only detectable interaction is gravity
DAVID T 3 aylar önce
we'd have to prove dark matter exist in the first place!
Jim Balter
Jim Balter 3 aylar önce
@Stephen Dias Everything in physics *depends on* definitions and models. Of course that's not all there is to physics. But in any case all this talk here about dark matter as if it were a flip side to regular matter such that there could be scientists made of dark matter is ridiculous. The whole point of dark matter is that it only interacts via gravity and doesn't form accretion disks, so there are no dark matter planets etc. The dark star hypothesis doesn't propose otherwise ... the role of dark matter in dark stars (which are not in fact dark--quite the opposite) is only gravitational.
Jim Balter
Jim Balter 3 aylar önce
@Bob Bobingham I never said there couldn't be such things ... your misinterpretation and misunderstanding of what I said and your other comments just further justify my "attitude", which is actually well accepted among intelligent people.
Flattermann 3 aylar önce
Wouldn't those scientists call their matter regular and ours dark? Maybe we are them D: Relativity!
Michael Deierhoi
Michael Deierhoi Aylar önce
Yes, the search for dark matter may be absurd, but right now it is the best option we have to explain the effects in the universe that we are seeing.
HereIgoAgain 2 aylar önce
Perfect job: dark matter detective. "Have you found any yet?" "No, still looking."
Sam's School
Sam's School 2 aylar önce
10:37 so basically, we are looking for a phenomenon that does not interact with matter by trying to make it collide with matter?
ולאָזטאָ ולאָזטאָ
Is "search" a misnomer? Shouldn't it be about developing the technology to perceive dark matter? Dark matter I suppose is all around us. We just don't have the means to perceive/see/hear/feel/taste/smell it.
gregor5582 4 aylar önce
As a german speaking person i think your pronunciation at 4:15 is EPIC. Still more than wrong :D Jokes aside as always an incredible video
中村奈々 3 aylar önce
mathis8210 3 aylar önce
And all he had to do was go to google translate and let it read it to him. Takes 10 seconds and makes the difference between sounding like a presentor or like a clown. ;)
schwarz 3 aylar önce
@Memento Mori I have seen people say "Drahahan" instead of "Drachen" so it wasn't that bad. But still bad.
schwarz 3 aylar önce
@Matthias Heymann close enough
MTK Lab Aylar önce
If dark matter is associated with galaxies it means on a some level clamped together. It means it lost some potential energy. How much energy is lost to create a structure with some mass during the time it shows how strongly (weekly indeed) interacts. Emitted energy is supposed to be partly by photons. This could be very low energy radiation or rare high energy. Did scientists try to observe the halo of dark matter alone?
Perfect World of Entanglement
What if a super strong massive dark hole rotate super fast and almost eliminate the heavy gravity around it, but still have a extended reach of gravity out to the end of its galaxy?
PoprocksAndCoke777 26 gün önce
@7:30 He did a really good job of explaining both of the theories without bias
I like the way Neil deGrasse Tyson theorize what dark matter might actually be. Maybe there's other dimensions that exist slightly out of phase of us and the gravity is the only thing that bleeds through
Jaya 3 aylar önce
I just wrote a massive thesis about dark matter'ss density within the universe (rather than detecting it on Earth, like this video is about)! I'm very glad that you mentioned Vera Rubin, the absolute legend, in the discovery of dark matter (4:26) -- she's often left out of the narrative for no good reason, but she is such a key and integral figure.
Hadrien Brissaud
Hadrien Brissaud 3 aylar önce
@Jaya Oh alright you answered this already. Cheers ! mad props
Hadrien Brissaud
Hadrien Brissaud 3 aylar önce
Thanks for your contribution bro that's amazing. Anything we can get our eyes on?
TAO TOLOGY 3 aylar önce
* Hypothetical * 'dark matter' and it's * hypothetical * density. There is still nothing more that has been observed in the universe than "galaxies and stars don't move the way the General Theory says they should". Really. That's it. And it *might* be that the discrepancy between the general theory and observed results * cough * the flaw in the General Theory * cough * really is due to a, so far, undetected, unknown, completely different matter or energy. And it *might* be that "all" dark matter/energy theory requires is a mere NINETY FIVE HUNDRED PERCENT increase in the total mass of the universe. Or........our understanding of how matter works, particularly at galactic scales, is possibly, maaaaabye? not complete.
Belugay 3 aylar önce
@Steen Iversen Good point
Steen Iversen
Steen Iversen 3 aylar önce
You are absolutely right about Vera Rubin and her research, unfortunately it often happens to female researchers that they have been and are being overlooked
Jonathan Zentelin
Jonathan Zentelin Aylar önce
"Dark matter" is just an hypothetical mathematical construct based on models we use. There is no reason to think our models are 100% accurate, and there is , so far, no empirical evidence of its existence. Our models don't work properly, and don't explain observable phenomenons so we invented a mathematical theory based on...nothing. And now this object "explain" what we can see. Once you have some actual dark matter and can study it, and confirm hypothesis, then we can talk. If it is matter, and the majority of matter in the galaxy, it should not be too hard to find some. After all, we even detected neutrinos, photons and Higgs boson.
gary851 Aylar önce
when i was a kid in the 90's i remember that they did something similar to hunt for neutrinos. Lot of deuterium in a mine and a big detector.
Stretch Lindsay
Stretch Lindsay 2 aylar önce
Could using a thick wall of led lined material also prevent anything in regards to radiation particles getting through?
Danny_MacDee 2 aylar önce
At 4:50 First of all, if there were NO dark matter to either accelerate or retard the speed of said galaxies, it would be constant IF: [my second hypothesis] these clusters truly have no center of gravity; I mean, are we to simply assume that a grouping of this scale would behave like a mere solar system? Consider the immense distance between these huge entities, and must the grouping be caused necessarily by gravitational force, or may that simply be because of the positioning of the fallout of the big bang? [I am not an ardent proponent of the big bang, although it has it's merits, and the intelligent designer could have brought the universe into being in whatever 'it's or His, or whatever pronoun you may choose' so desired] Furthermore, how would we set out to prove the assumption in this case?
a b
a b 4 aylar önce
I'm a PhD candidate working on DM and I think this video was great. I see so much discussion online where people assume scientists are just being narcissistic when we assume DM exists and that it must be like the new version of luminiferous ether theory, because they're not in tune with just *how much* **independent** evidence we have that is cleanly explained by particle DM. My only gripe with the entire video would be that I wish you had mentioned specifically that the idea of a particle "we can't see" or being "dark" isn't absurd in the slightest--I think part of why laypeople have gripes with the idea is that they think it's absurd that we could just posit something "invisible" is there. In reality, we already know of MANY particles that are similarly "invisible"--like neutrinos! In this context, "invisible" just means "doesn't interact with light" which is precisely true of neutrinos, and yet we are bombarded with trillions upon trillions of solar neutrinos every second from the sun. Unfortunately, we are not so lucky that DM is as easy to detect as neutrinos :)
Vesalius 2 aylar önce
@AtticMuse "I won't fully believe in dark matter until we can indeed detect it directly and start to measure its properties as a particle." Thank you for saying this! and I thought I was the crazy amongst my friend in a recent discussion we had about dark matter. They argue that "We know for certain, for 100% that it exists, we just don't know what it is exactly". Now don't get me wrong, I do thing that the dark matter hypothesis is the best one we have for explaining the light bends and gravitational speed differences and yet, I just can't fully accept that hypothesis until we have direct evidence-some sort of direct proof for it. Is this such a crazy opinion to hold?
AtticMuse 2 aylar önce
@GeorgeMonet Respectfully, I don't think you know what you're talking about. You say that galaxies without DM are good evidence of its inexistence, and then immediately say we can't tell if a galaxy doesn't have DM because we can't detect it, contradicting yourself. We can estimate the amount of dark matter present in galaxies by measuring rotation rates and the amount of visible matter. Since most galaxies have rotation rates inconsistent with the amount and distribution of visible matter, we posit the presence of dark matter halos, with typically around 5-6 times as much mass in dark matter as there is in regular matter. However some galaxies appear to have vastly lower amounts of dark matter (ie. The visible matter can explain the rotation rates on its own) and some appear to be almost entirely dark matter (see Dragonfly 44). This makes sense if dark matter is a substance that can exist in greater or lesser amounts throughout space, but is less easy to explain if gravity simply acts differently on galactic scales. I think there's enough independent lines of evidence (like galactic rotation curves and measurements of the cosmic microwave background) to take dark matter seriously, but I am fully open to future theories of gravity maybe finding a way to explain the data and I won't fully believe in dark matter until we can indeed detect it directly and start to measure its properties as a particle.
AtticMuse 3 aylar önce
@wNG iMAGE aND dESIGN Galaxies without DM are actually good evidence in favor of its existence. If the effects we had been attributing to DM were actually just from gravity behaving differently at these large scales/low accelerations, then the effects should be present in all galaxies. If the effects are because there is some kind of matter causing it, then you can imagine cases where there's more or less of it, even potentially none of it, in a galaxy.
Brent Reimer
Brent Reimer 2 aylar önce
We are looking for particles, but only seeing gravity. In some circles of string theory it is supposed that some strings are attached to the fabric of spacetime in their respective universes, like a string with both ends glued to a table top, the table top being the universe. While other strings are closed loops, like elastic bands. These closed loop strings could have the ability to travel into neighbouring universes if a "multiverse" exists. If the string(s) that are responsible for gravitational attraction are closed loops then gravitational influence could extend beyond our universe to effect other universes, which would also mean that gravtiatonal forces from massive objects in other universe would also effect our universe. Dark matter (or extra gravity) could just be the gravitational influence from massive objects, like galaxies, in neighbouring universes. Like ink bleeding through pages of a book. I feel the relative weakness of gravity as a force is evidence of this as we are only measuring the force of the gravity acting in our universe. Gravity may be deemed to be closer in magnitude to the other fundemnetal forces of the universe if we could measure its effects multidimensionally. This would also really make sense for the situation where the galaxy clusters collided leaving the gass in the middle, but having the dark matter keep moving as though the collision had little effect on it. If the influencing objects were also located in seperate universes there would have been no physical collision between them.
amaureaLua Aylar önce
"This is our galaxy": Well, it's an artist's impression of what our galaxy might look like from outside. We actually still don't know all that well what our galaxy look like, or even how many spiral arms it has.
P Just
P Just Aylar önce
As the person in the mine mentioned, there may be an entire standard model of particles that make up the "dark matter" continuum. If so, then could those particles that make up, let's call it Standard Model Prime (SM'), interact with the other particles in SM' like our SM particles, creating an entire universe of galaxies, stars, planets, and possibly even people in the SM' universe? If so, and the calculations and observations say the amount of DM is 5 times that of our SM universe, then perhaps there is a SM' universe and 4 more universes full of particles in their own standard model, SM'', SM''', SM'''', and SM''''', or Standard Model Prime to Standard Model PrimeX5. One could conclude that our gestalt continuum consists of SIX separate universes, each with their own Standard Model of particles that interact within their universe, but only interact with each other through the distortion of the continuum that we call gravity. Thus, the multiverse theory could explain the existence, and the lack of interaction between the six distinct universes made up of the six sets of Standard Model particles. Why SIX universes? In a three dimensional continuum that we find ourselves part of, there are SIX directions: X+, X-, Y+, Y-, Z+ and Z-. So each universe corresponds to a different "direction", and universes on different "directions" don't interact except for distortion of the continuum, i.e. gravity. Please feel free to fire at will. I've spent all of 20-30 minutes on this deep analysis. 😀
Syed Shahid
Syed Shahid Aylar önce
I live in karachi Pakistan I like your communication
wwickeddogg 2 aylar önce
Gravity affects light. We have observed the lensing effect of gravity on the light from distant stars produced by black holes and that is how we learned about black holes. What if the apparent velocity of stars in distant galaxies is affected by the gravity of the galaxy such that the stars more towards the center appear to be moving more slowly and the stars towards the outside appear to be moving faster?
Robert Carlyle
Robert Carlyle 2 aylar önce
I think the basic science value of the search is worthwhile regardless, but I am curious: does anyone hypothesize about possible PRACTICAL applications of the discovery?
Denny Bennett
Denny Bennett Aylar önce
Questions that can't be answered are what drives a lot of scientists. I quite like questions without answers. Never be ashamed to say you don't know something. It's just knowledge that hasn't been discovered yet. "We don't know", is a legitimate scientific answer to a question.
Gwashere 2 aylar önce
I don't really think that if there is dark matter, we didn't detect it. I suppose that stars in the far end of galaxies is so fast, because it is pulled by other stars, closer to the middle. (Probably wrong)
blastiann 2 aylar önce
I’m not sure if someone has already asked, but when will they start the experiment in Australia? Has it already begun? Do we have results from the experiments?
MegaKikeo 4 aylar önce
"it may elude us, but at least we've tried". This is so beautiful. That's why I love science. It's OK never to find out, but you've gotta try. Thanks for a great vid!!
MegaKikeo 3 aylar önce
@Jayson Kenley we could very well be, indeed. And the fact that we don't know it (yet) does not make it supernatural. Science is not about knowing everything, it's about knowing and acknowledging what we don't know. The exact opposite of some who would just deny the existence of what they don't believe in (be it a god, a virus, or whatever else). Science is about being humble and accepting that we might not comprehend everything, while researching to always push the boundaries of our knowledge, understanding, and sheer ability to make sense of something that is way bigger than us. That's what makes us human.
@Jimmy2Hertz lol still funny..
Jimmy2Hertz 3 aylar önce
@STORY TIME WITH UNCLE KUMARAN Because often the journey is more important than the destination.
Username 4 aylar önce
@David Dirré-Moire Bro, that's how research works. It's worth it. Pointing at only when it doesn't work out fails to point out how many times it has progressed our understanding and lead to direct impacts on technology and quality of life as well. This is such a dumb take.
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