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
Thumbnail by Ignat Berbeci
Produced by Derek Muller, Petr Lebedev, and Emily Zhang









コメント数 : 14 250   
The other John Smith
The other John Smith 11 ヶ月 前
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.
doug randall
doug randall 11 ヶ月 前
Some stone ager did find metal, that is how the Copper Age began.
Hinsberg Reagent
Hinsberg Reagent 11 ヶ月 前
@doug randall and that’s how the dark matter age of humanity will begin , dark tech ? 🤣
morrow 11 ヶ月 前
we know what to look for because dark matter interacts gravitationaly, which is a thing we can measure. it's like being blind but looking for the fire because it radiates heat.
mina magdy
mina magdy 11 ヶ月 前
More like telling a person from the stone age that they might get a shiny surface from heating up certain rocks hot enough. So long as they keep seeing rock after the fact, they will try to better insulate the rock or try to find other samples. When one finally melts, they may see a semi-shiny surface and assume, correctly, that they are close. They will likely then try to perfect smelting techniques to get a better finish/metal over time.
doug randall
doug randall 11 ヶ月 前
@Hinsberg Reagent I think they will just call it The Dark Age.😁
Vlad Dracul
Vlad Dracul 9 ヶ月 前
"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
Super Playlists
Super Playlists 9 ヶ月 前
Well, in this case the word 'dark' is actually before something so 🤓☝
leagueofotters 9 ヶ月 前
@Super Playlists Well, you failed to take into account that it is actually immediately preceding so...
ratemisia! 9 ヶ月 前
@Super Playlists Because that NDGT joke was directly pertaining to dark matter..?
meenay💌🌲 9 ヶ月 前
Josh swimmerly
Josh swimmerly 9 ヶ月 前
Lots of people didn't know what they were talking about until they did. Some guy on the Internet.
James Limmer
James Limmer 3 ヶ月 前
Thanks for sharing this. I went to the mine site when they made the announcement of its first stage completion. They wouldn’t let me in though 🙂
A real female cute anime girl who isnt a old man!
this comment needs more likes!!!
Steven Strotsgraz
Steven Strotsgraz 2 ヶ月 前
Swarnava Bose
Swarnava Bose ヶ月 前
tf 🫠
Onychoprion27 5 ヶ月 前
Since we already know of particles that don’t interact with some of the fundamental forces, it makes more sense to me that there’s a particle that simply only interacts with gravity. Like, neutrinos only interact via the weak force and gravity, but we already know a lot about them; I doubt dark matter, if it interacted with either of the nuclear forces, could be so elusive.
Samuil Zaychev
Samuil Zaychev 4 ヶ月 前
What you said made a lot of sense, because still after watching the video I was confused. Thank you :)
HispAnakin 26 日 前
But think about if a particle doesn’t interact with anything then it’s literally impossible to detect. If dark matter *only* interacts with gravity but on a minuscule level, then it’s going be incredibly difficult to detect on a small level. We’re only seeing the affects of dark matter on a astronomical level. Meaning it takes a ton of dark matter over a massive area to affect anything.
luca buondonno
luca buondonno 5 ヶ月 前
Just a little geographical correction: this laboratory is not in the Italian Alps, but in the appennine, under the "Gran Sasso" (literally "big stone"), the highest non alpine Italian mountain
Mr. Rabbit
Mr. Rabbit 4 ヶ月 前
Yeah I'm going to Alps soon so I wanted to find where it is but I couldn't find a trace of it being in the Alps anywhere in the internet. Such a blunder by Veritasium
Kansoganix 4 ヶ月 前
@Mr. Rabbit Actually it's in the Dark Italian Alps. No surprise you didn't find it.
Davide Nunin
Davide Nunin 4 ヶ月 前
@Kansoganix pretty sure they re called appennines
Matteo Dolcin
Matteo Dolcin 4 ヶ月 前
@Davide Nunin as an Italian, they are
Mr. Rabbit
Mr. Rabbit 4 ヶ月 前
@Kansoganix "..nobody have been yet able to find it" :D
CamFlies 5 ヶ月 前
Veritasium.. outstanding work. Really well explained and I truly can't help but respect the fact that you actually reference your sources in the description, instead of just saying "facts" which other channels seem to produce with no attempt at reference. Thank you and great work!
Raven4K 14 日 前
or simply put the detectors range is less then they realize and as the earth orbits around the sun earth gets close enough to detect dark matter well and then scan results drop off as we get further away from it
CamFlies 14 日 前
@Raven4K uhh?
Raven4K 13 日 前
@CamFlies yeah I know our dark matter detectors have a limited range if that's the case or it could be a black hole and as the earths orbit brings it close to it that's setting the detectors off and they drop off as we orbit away from the hole during the year you know fun times
CamFlies 13 日 前
@Raven4K I fail to see the relevance of your comment to mine tho lol
Roxor128 11 ヶ月 前
"It may elude us, but at least we tried." The essence of science in one sentence!
Electro-Cute 11 ヶ月 前
""" Our model of the universe can't be wrong. The evidence has to be wrong. """ Dark matter in a nutshell. Imagine talking about the essence of science in the meta of extreme cases of pseudoscience. Imagine saying the same when someone's experiment to find god failed. If there is no way to disprove something it has no place in science what so ever. Tell me how to disprove dark matter or accept that it is BS.
Roxor128 11 ヶ月 前
@Electro-Cute I don't particularly care if dark matter gets thrown out or not. If we can refine general relativity so dark matter becomes unnecessary to explain what we see, GOOD! We've got a better explanation than we do now. If one of these experiments actually pans out and finds the stuff, also good! More interesting things to investigate.
NK 11 ヶ月 前
@Electro-Cute all models are wrong. Some are useful.
Oscaragious 11 ヶ月 前
I would say the essence of science is learning. If we try, but don't learn, it's kinda pointless, right?
Ashurean 9 ヶ月 前
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.
Stephen Holt
Stephen Holt 9 ヶ月 前
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...
pyropulse 8 ヶ月 前
@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
GonPlays 2 ヶ月 前
A theory suggests that Dark matter could be normal fermions sitting on higher dimensions of the universe
Raven4K 14 日 前
but what if it's not dark matter but instead just a black hole that they are detecting and we just happen to orbit close to is every 6 months which is why the scan result peak in summer and drop off in winter
N2EYE 9 ヶ月 前
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?.
Raven4K 14 日 前
what if it's not dark matter but instead a black hole they are actually detecting?
Austin Estep
Austin Estep 11 日 前
@Raven4KI believe that was confirmed to not be the case, I don’t recall how however.
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
@philo betto 😅🤣😂 now that is funny. Thank you for that and don't lose your sense of humor.
philo betto
philo betto 3 ヶ月 前
​@CANNIBALCROW I couldn't if I wanted to what Being funny does for me is like what makeup does for ladies.... lmao!
David Spector
David Spector 14 日 前
There is no such thing as "existence out of phase". That is a science fiction concept.
Dillon Schroeder
Dillon Schroeder ヶ月 前
I am never not amazed at just how much Humans are able to find with nothing but just thinking.
David Spector
David Spector 14 日 前
I am not at all amazed at myself for my unremarkable reaction to comments like this.
nick grottenthaler
nick grottenthaler 5 ヶ月 前
The correlation between the dark matter peaking in june and November and the increase in chances of getting hit by a meteor during those same months is spooking me out 😮
Matthew Plizga
Matthew Plizga 5 ヶ月 前
They literally explained it tho if your flying through space faster your way more likely to hit things than when you go slowly lmao
henry johnson
henry johnson 5 ヶ月 前
Some things are coincidentally similar, though
SCR1BE IV 5 ヶ月 前
@Matthew Plizga Eh but aren't you more likely to avoid getting hit by things too, because you could get out of the way faster? Also consider this: it's a well-known idea that if someone is trying to shoot you, run in a zig-zag, not a straight line. Doesn't matter how fast you run, what makes you an easy/hard target to hit is the direction that you're moving. My point is that there are more factors that can affect how easy of a target Earth is -- not just its speed.
lowkey loki
lowkey loki 5 ヶ月 前
@SCR1BE IV No. Moving faster through space makes you more likely to impact stuff. This is a well established principle, there's plenty of videos and explanations on it with good visuals. Zig-zagging doesn't matter at all, so long as the speed remains constant. Also, meteors don't aim themselves. They just exist in space at some velocity, and if earth exists near them, they will impact earth.
Amahlaka 4 ヶ月 前
More people outside during summer?
Emang Gitulah
Emang Gitulah 11 ヶ月 前
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
Raj 11 ヶ月 前
That's so cool!
Andy Lee Robinson
Andy Lee Robinson 11 ヶ月 前
It is steel that they use from the ships that were sunk before the nuclear tests, or any iron that was made before then.
Rafael Lang
Rafael Lang 11 ヶ月 前
You made me post my first youtube comment. Ever. ;) We use lead from sunken Roman ships. But that's super rare, so it's really only used in the CUORE experiment for some of the shielding, and for soldering stuff in some specialized applications, such as in CRESST. Old iron is too brittle. And copper can be made extremely clean using electrolysis (and even cleaner doing the electrolysis underground)
IR W 11 ヶ月 前
alright 11 ヶ月 前
lorenzo petrarca
lorenzo petrarca 5 ヶ月 前
0:47 The Dama/Libra is under the Gran Sasso mountain chain in Abruzzo, actually it’s the highest mountain in the Appennini. The Alps are located in the northern Italy going from est to west, the Appennini divides Italy in two going from north to south (starting roughly at the border of tuscany and emilia-romagna and ending with the Etna). The lab where the Dama/Libra is locates is called INFS (istituto nazionale fisica nucleare) and they also tested neutrinos’ speed with the CERN in Ginevra. Best regards from Montorio al Vomano, 20 minites away from the mentioned lab!👋🏼
Enchantaire 7 ヶ月 前
Bravo to Veritassium and all the scientists involved. This is really exciting. We're born in this universe full of secrets, and we are unveiling them, one by one.
Charlie Theteacher
Charlie Theteacher 5 ヶ月 前
Great video Derek! I love how Geraint F. Lewis sums it up at the end. Thank you also for leaving the clips of how emotional scientists can be with their pet projects - good to remember.
Lorenzo Principe
Lorenzo Principe ヶ月 前
Hey, very well done intro to dark matter! Just a small thing, the pictures you show when mentioning Dama/Libra are of the XENON1T/XENONnT experiments, still within the LNGS underground laboratories. They are also looking for dark matter, but with different technologies
Aaron Animation s
Aaron Animation s 2 ヶ月 前
This video was very informative and entertaining. I learned a lot about dark matter and the experiments that are trying to detect it. I especially liked the part where you explained how the SABRE project works and how it uses crystals to measure the recoil of atoms. The animations and visuals were also very helpful and engaging. Thank you for making this video and sharing your knowledge with us!.
Semaj_502 11 ヶ月 前
"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.
Cheezy Nachos
Cheezy Nachos 11 ヶ月 前
Its one hella cost research tho
Pyro Thunder
Pyro Thunder 11 ヶ月 前
@Cheezy Nachos yes but finding answers on that scale is more than worth it. Even if it takes generations to find out
WildEye 11 ヶ月 前
I liked that too. Cheers.
Corey M
Corey M 11 ヶ月 前
Ehh! He's a flip flop. Especially by discounting legitimate Dark Matter observations like random Gravitational Lensing. He doesn't even mention it. It's clearly something and isn't bound by a name. Whatever this stuff is if harnessed would make that hologram Jaws in Back to the Future 2 possible and completely replace VR and monitors. The possibilities are endless. Flying Cars would be made possible too and making heavy objects (like buildings) very light.
Science Inventors
i've lived near the italian detector for years and it is absolutely amazing to discover so much time later what did they do and discover inside that laboratory. There is a gallery which passes just trough the gran sasso and in that you can see a door with written "INFN Laboratory". I've always been curious to discover in what is at the other side of the door but it is almost impossible to enter in there whitout any specific pass.
Life Is A Curse
Life Is A Curse 3 ヶ月 前
Very interesting video as always :D Just wondering why you don't put german stuff like "Dunkle Materie" into a speech/translation programs, so you hear the correct pronounciation - or just straight up use an audio clip of that program, if it is too hard to speak (I know it's not the easiest to pronounce foreign languages myself haha). Cheers :3
ikasuki1 9 ヶ月 前
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 👍
Jay B
Jay B 5 ヶ月 前
Human beings finding dark matter is the equivilant of a character in a video game being able to find the physical hardware doing the processing to create his pixelated world.
Logic caster
Logic caster 5 ヶ月 前
Prove it
Tom 5 ヶ月 前
Fall Guy
Drew 3 ヶ月 前
DoctorX17 5 ヶ月 前
If Dark Matter didn’t interact with itself at all aside from gravity, wouldn’t it end up piling together into singularities in places? If there aren’t repelling forces to keep particles from occupying the same space?
Logic caster
Logic caster 5 ヶ月 前
Could be
ARAC Destroyer of Worlds
Okay so exposition time from someone who's currently working on dark matter densities. If dark matter does interact with itself, then yes there would be the dark matter equivalent of friction and dark matter would slowly migrate to already dense places in the Universe. This is because friction is the result of particles colliding/interacting and re-distributing their energies, and changing the energy of a particle alters its trajectory. However, we have no evidence (that is significant and that I know of) for this dark matter self-interaction. Think back to the Bullet cluster example. If the dark matter did self-interact significantly, it would have behaved more like the ordinary matter; colliding and getting stuck in the middle. This didn't happen, and instead the dark matter clouds passed through each other completely unfazed. No significant self-interaction means no way of re-distributing energy, and thus dark matter particles don't alter their trajectories once they're on a set path. This means that the only dark matter particles that would end up in singularities, are the ones that were already going to collide with one head-on, and the radius of no escape from a heavy object is very small compared to the rest of the Universe. So yeah, that's why we have dark matter zipping around all over the place.
Paul Thomas
Paul Thomas 24 日 前
Yeah "degeneracy pressure." It should be considered a fundamental force (and strong/weak aren't) but they have a model that forces are carried by particles (which they aren't) so it doesn't qualify.
Ghost Prime
Ghost Prime 21 日 前
@Paul Thomas Curious, why do you think forces arent carried by particles? And why do you think degeneracy pressure should be a fundamental force when its just an extreme manifestation of the pauli exclusion principle but the Strong/Weak forces shouldnt be fundamental forces when they describe how atoms stay together?
Better Chapter
Better Chapter 11 ヶ月 前
The deeper you dive into physics and cosmology the freakier it gets.
Bow Hunter
Bow Hunter 11 ヶ月 前
And none of it matters at all....
BillAnt 11 ヶ月 前
Same goes for JPvid. ;)
Sensei Sapphire
Sensei Sapphire 11 ヶ月 前
@Bow Hunter *matters* (physics joke)
AllWheelDrive 9 ヶ月 前
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.
An interesting experiment would be to put an observatory either opposite the earth’s orbital location to see if the period is observed and off by 180 degrees. Or even putting one at the L4 or L5 Lagrange points
ATR 77
ATR 77 5 ヶ月 前
but how did they are going to remove the backgorund noises (muons, radioactivity) if they put that up oin the space?
@ATR 77 true, Edit: we just need to find the right nickel-iron asteroid to hollow out for shielding a similar sensor at its core.
andreacostanza ヶ月 前
WOW Derek what a brilliant, easy while thick, luminous while talking darkness, open episode of Veritasium You did! Simply Thank You. In the first animation you answered so many 'never dared to ask' questions i had about motus, speed, momentum of the Solar system travelling through empty space, and in the end a clever openess: let's see 🙏🏻❤️
David Spector
David Spector 14 日 前
This is an incredibly oblique yet straightforward comment, bulky in the edges, yet so thin in the middle. I almost couldn't see it even though it was so large.
Albert Kustra
Albert Kustra 4 ヶ月 前
Not a bible thumper, but i love how scientists always explain things the same way the bible does.
Incepter 4 ヶ月 前
Dark Matter will always blow my mind since it is just as mysterious as Dark Energy, but it amazes me that people already have a machine that can detect Dark Matter.
Josh Binder
Josh Binder 11 ヶ月 前
Here's to hoping we get a dark matter detection in our lifetime! Cheers
Dorijan T
Dorijan T 11 ヶ月 前
There's more chance for us to find inteligent life in our own solar system than to find dark matter.
Wicowan 11 ヶ月 前
@Dorijan T and where does that come from ?
Mr Random
Mr Random 11 ヶ月 前
Don't hold your breath
Felix Isaac
Felix Isaac 11 ヶ月 前
@Danny Archer Oooh, now that's fascinating.
Ashley Smith
Ashley Smith 11 ヶ月 前
Why? What are you gonna do with it? Sell it on ebay?
Operator Chakkoty
Operator Chakkoty 4 ヶ月 前
The star Vs weight on a string is actually a genius visualization. I wonder where he found it or if he come came up with it himself.
David Spector
David Spector 14 日 前
It is a conventional visualization of the centripetal force--well-known at the introductory physics level of education. He came up with the objects and string himself.
Brett 7 ヶ月 前
“If we see something, then we’re all happy” - exactly how I remembered Elisabetta’s teaching 😁
Lucas Kerper
Lucas Kerper ヶ月 前
One of your best videos yet! Space theory feels so philosophical yet sciencey at the same time.
CrabBattle 9 ヶ月 前
"How do you know dark matter exists?" Physicists: "...Because I really want it to."
Furkan 11 日 前
I have a ton of respect for Dirk but the way he butchered the word "Dunkle Materie" is really hilarious. I was listening to it without watching and then checked my phone screen to look how the word looks and i cracked up 😂
Lost in Play
Lost in Play 11 ヶ月 前
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.
Martin Andersen
Martin Andersen 11 ヶ月 前
This is a very important point! It's not obvious that a civilization would pay for this.
Scuttt1 11 ヶ月 前
amen brother
Valentine 11 ヶ月 前
Billions of dollars in grant money is not economic to you then?
Pluto :
Pluto : 11 ヶ月 前
dark matter is actually just the medium in which consciousness exists, aka it is the soul. that is why it can be found in mountians/ancient volcanos where xinu deposited souls at the beginning.
Vableme 3 ヶ月 前
Imagine scientists putting million dollars and time into it and just discovers "gravity" was a dark matter too lmao
Sean Meehan
Sean Meehan 9 ヶ月 前
This was really fun to watch and I'll bet it was amazing to make.
HelplessTeno 5 ヶ月 前
This channel is just such a gift.
ΜπάξIνΣιξ 8 ヶ月 前
It’s crazy that at some point in the future, people will think that there was a point in the past,that humanity was calling …. dark matter!
I like how so many experiments looking for high-energy particles boil down to looking for flashes of light in dark spaces.
Okay Nevermind
Okay Nevermind 23 時間 前
Nicely put 😮
NuclearDude 11 ヶ月 前
"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.
Fel Anderis
Fel Anderis 11 ヶ月 前
Imagine that, scientists that aren't claiming they know everything... Big change from what we've been exposed to for the past 2 years...
Loturzel Restaurant
Loturzel Restaurant 11 ヶ月 前
@Fel Anderis Scientific Integrity probably demands to inform yourself about the current wave of anti-science and lgbt-hate, I'd argue. As if Science-JPvidrs and Atheist-Channel werent alwready-and-anyway kinda closely similar, but now it's literally them who impose the issues dubbed 'Trumpism' and Extremism in general. Telltale Atheist informs/warns about LGBT-Issues, so?
Fel Anderis
Fel Anderis 11 ヶ月 前
@Loturzel Restaurant First...No they aren't. That statement is laughable. Second...kinda off topic, no?
Wesley P
Wesley P 23 日 前
i tend to like the idea that we dont actually know anything at all and just think we do and because we cant explain why we dont know things, we assume things that are not true.
Robert Keyes
Robert Keyes 9 ヶ月 前
"absurd" is completely the correct term to describe dark matter.
Fit_PharmD 7 ヶ月 前
You want to talk about feeling small and putting your day to day problems into proper perspective. Just listening to this and seeing what is going on all around us in space makes my mental heath, job, and social issues seem like nothing at all. Like there’s so much more out there than what my senses encounter during a single day. Just wow is all I can think to say.
Fit_PharmD 7 ヶ月 前
This is the literal frontier of science. This video is attempting to explain what we as an entire human race cannot currently explain or understand at the moment. The crazy thing is it only takes one human or other being (who can say really) to encounter this enigma and go oh I know what’s going on here and unravel it all. God I really hope I’m alive to hear the explanation or even better be part of it.
David Spector
David Spector 14 日 前
If this is the literal frontier of science, my question to you would be, what is the virtual or imaginary frontier of science?
Tao Covillault
Tao Covillault ヶ月 前
Lately, everytime I see your videos (which are super amazing by the way :P), I can't stop thinking of these BTS shots 14:17 There is always one shot where we see you filming and as a filmmaker myself, I'm always baffled by the stability of your shots, even when holding very awkwardly your A7sIII 😅 I bet you disabled IBIS and then use the Catalyst Browse stabilisation ? 🤔 But anyway, ou must be an amazing surgeon, because your hands are steady as granite 😳! And this pose particularly, is insane 🤣 I use the A7IV, and I only wish I could manage to be this stable, even with a gimbal xD
xSociety 11 ヶ月 前
"It may elude us, but at least we tried." That right there is what science is all about. Loved that quote.
Phoboz 11 ヶ月 前
Having evolved as sentient beings, in a universe where some things might never be detectable or provable, is the ultimate cosmic irony.
Drops2cents 11 ヶ月 前
That's one of the great things about science: even if an experiment fails, it may still be a win because of the interesting data gathered in the process which in turn may lead to fascinating new discoveries. So the most important science quote isn't "Heureka!", but: "Hey, that's funny..." - because that's how _every_ expansion of knowledge begins. 🙂
Abajur 11 ヶ月 前
except maybe it isn't there, and you are searching for the phantom of a particular mathematical formula that predicts what we know but requires the existence of something that doesn't exist maybe time and money could be better spent looking for an alternative theory
cam quoc
cam quoc 11 ヶ月 前
Edin Zukić
Edin Zukić 11 ヶ月 前
Luminiferous aether has eluded us for almost 200 years.
riccardo ammendola
riccardo ammendola 2 ヶ月 前
You are just amazing. I wish for more channel like yours. Thank you for your work.
David Spector
David Spector 14 日 前
Your comment is remarkable. I hope you write more just like it. Thank you for your work.
Kestin Sarver
Kestin Sarver 5 ヶ月 前
I had a thought, what if dark matterr isn't an object but a field of reality that we just don't know yet. We couldn't figure out why mercury had such a weird orbit. Some thought that maybe there was a planet inside the orbit of mercury. We had just found the last planet because of the same reason. However this was obviously wrong turns out the thing that was missing was relativity by Einstein. I feel that this is very close to what we have now.
ayo 5 ヶ月 前
My personal layman imagination is that when virtual particles come in and out existence is never really gone (matter that exists for short times inside of vacuum, and that hyper massive particles that exist for short periods of time when destroying atoms) Somehow us destroying atoms can actually turn the dark matter into matter we can actually interact with.
ThriceGreat 5 ヶ月 前
"Dark matter" is "the Aether " the ancients talked of, utilizing geometric patterns aligned a specific way, well, maybe they'll find something then.
Mr. Rabbit
Mr. Rabbit 4 ヶ月 前
@ThriceGreat Its nowhere even close, those are 2 totally different 'ideas', and the only thing in common is they were presumably "everywhere, filling the void". Apart of it, it's like saying "the cable is the electricity"
Adriano Quanto
Adriano Quanto 3 ヶ月 前
I feel kind of like it too, I imagine Dark Matter like a "fluid" that fills the Fabric...
Andrelopithecus 9 ヶ月 前
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.
Andrew Wiggin
Andrew Wiggin 9 ヶ月 前
My thoughts exactly. It seems to me far more reasonable to assume that we have it wrong than to assume the universe is full of matter we can't interact with.
UpSky2 9 ヶ月 前
Gravity might have a lot more than Newtonian mathematics ever covered. What if thousands of massive point sources, or millions... or, yes, billions and billions... act differently together than the assumed point source at the center Which is what Newtonian gravity math basically assumes. The Simple Model, as it were. Also, gravity seems to act odd everywhere, on astronomical scales. What about that?
fat 9 ヶ月 前
not something i expected from someone with a creeper pfp
TRauck 9 ヶ月 前
Look into plasma physics and the electric universe theory.
Corinne Ng
Corinne Ng 9 ヶ月 前
@fat humans are complex beings so… I wasn’t expecting that either XD
andreaś _-
andreaś _- 2 ヶ月 前
Veritasium makes science fun and exciting to learn
Nguyên Phuong
Nguyên Phuong 7 ヶ月 前
I'm not really good with physic so could you explain for me, if possible how can black matter transfer its energy to the sodium crystal when earlier in the video you said that dark matter don't interact with matter. And I believe one of your example is when two galaxies collided the heavier part is on both end because dark matter just pass though other ordinary matter. I'm asking this question because I am genuinely curious about the topic, not to complain or anything. Anyway, the video is amazing and have a nice day.
EnricoV 年 前
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.
Meta Egoist
Meta Egoist 年 前
How did u even watch the video in 9 minutes?
Giulio Piccinno
@Meta Egoist my brother in Christ, 2X does exist
Dramwertz 年 前
@Giulio Piccinno the greatest gift given to humankind
Giulio Piccinno
Anyway he says it in the first minute
Siyi Zhou
Siyi Zhou 3 ヶ月 前
It is an amazing idea to use a thin line connect to different masses in the center with a star to illustrate the effect of dark matter.
David Spector
David Spector 14 日 前
I didn't see that anywhere in the video.
Your future wife
Your future wife 2 ヶ月 前
If I just watched this a week before, I would've gotten a couple of extra points in my physics finals.
PoprocksAndCoke777 8 ヶ月 前
@7:30 He did a really good job of explaining both of the theories without bias
Cy8er Cat
Cy8er Cat 9 ヶ月 前
Dark matter always seems like a new aether to me. Tbf i am no scientist and there are plenty of learned people much smarter than i will ever be working on this but it almost feels like plot armor in a movie
Coopierre 9 ヶ月 前
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.
David Spector
David Spector 14 日 前
I don't see how that can possibly be true. Can you explain further, or was your quick thought the result of an equally quick physics education?
Tracy Trawick
Tracy Trawick 11 ヶ月 前
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 JPvid! 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!
Skotch Izolentovich
Skotch Izolentovich 11 ヶ月 前
Wow! Great story!
Dylan Dutson
Dylan Dutson 11 ヶ月 前
Beautiful! My 4 year old daughter loves to watch "space videos" before bed and it's the best thing in the world.
Zeus P.
Zeus P. 11 ヶ月 前
I'm so happy for you and your grandson. You both have someone to share ideas and theories. I start sharing mine with people and they usually tune out or get bored. You're both blessed to have each other. Now, to the observatory! :)
Bonnie Davis
Bonnie Davis 10 ヶ月 前
I'm 75. Appeals to all, new brain or old.
Max Tmy
Max Tmy 10 ヶ月 前
This is so beautiful! I hope my daughters inherited my interest in anything (Astro)physics. In a few years I will know. And you and your grandson discovering this by accident is a great story.
Michael Deierhoi
Michael Deierhoi 9 ヶ月 前
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.
Asfar Asiam
Asfar Asiam 6 ヶ月 前
Best way to put it. It's strange when I see veiled comments that seem to say "the observations are wrong" ... or even "stop observing"
Dazanar 9 ヶ月 前
i love the hands on experiments you show us more basic minds so we can all get this.
Suficientemente Bom com Marcos Fanton
Your videos always amaze and inspire me. Thank you.
TJ C 9 ヶ月 前
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?
Meboy1000 9 ヶ月 前
when he says it doesnt interact with luminous matter it's a simplification, he does touch on what DAMA/LIBRA is actually assuming dark matter is, a WIMP, (Weak interacting massive particle). This assumes that dark matter can interact with regular matter, but does so at such low rates that it is borderline undetectable, thus remaining undiscovered.
rutger5000 9 ヶ月 前
@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.
TJ C 9 ヶ月 前
@Meboy1000 Thank you!
anon 9 ヶ月 前
@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.
sorsocksfake 9 ヶ月 前
@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.
Angela Lewis
Angela Lewis 9 ヶ月 前
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 9 ヶ月 前
I like those names too
Aman Verma
Aman Verma 5 ヶ月 前
Tesseract is a 4D hyper cube 🧊
Nicolas Duguay
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"
yea you need to stop watching too much tiktok
pamford bridge
Don't be dramatic
Jablue 年 前
The atrocities and terrible treatment of one another are examples of the lows. Don't let those things distract you from the highs.
David Rice
David Rice 11 ヶ月 前
That is the human spirit we cant understand everything but we still want to learn
Freak80MC 11 ヶ月 前
@pamford bridge Hard not to be when you see how humans treat each other. Look around every once and a while and you realize we haven't evolved much past our ape ancestors.
famicom89 2 ヶ月 前
Just a correction: those mountains are Appennines, Alps are in northen Italy and are shared with many other european countries
Isaac Sarnoff
Isaac Sarnoff 9 ヶ月 前
Very nice video. One very pedantic note, at 0:53 and 10:11, you say "Dama/Libra" but show footage of the Xenon detector. Both are dark matter detectors located at Gran Sasso National Lab, so easily confused, but different detectors.
Andy Miron
Andy Miron 7 ヶ月 前
I would think the Galactic center has a lot more mass than we think it has.
John 4 ヶ月 前
I liked the evidence you presented. Good job.
David Spector
David Spector 14 日 前
I like the brevity of the comment you wrote. Good job.
bob gade
bob gade 9 ヶ月 前
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
David Spector
David Spector 14 日 前
Someday,. if you ever get an education in science and come back and read this, you'll be incredibly embarrassed.
I imagine scientists made out of dark matter are setting up similarly complicated experiments to try to detect this mythical "regular matter"
Milton B
Milton B 11 ヶ月 前
Light matter perhaps? Lol
Loplop Ploplo
Loplop Ploplo 11 ヶ月 前
coryman125 11 ヶ月 前
I love the idea that their world has played out so exactly the same as ours that they actually have the same English language, except by some quirk they call themselves "dark matter" and call us "regular matter"
crustum cremo
crustum cremo 11 ヶ月 前
That's racist.
Dr. Beanut
Dr. Beanut 11 ヶ月 前
we would be like dark matter to them
Jack the Doctor
Jack the Doctor 2 ヶ月 前
8:56 I've always found it eerie that this classic picture of the CMB, which I first saw in college, years ago, has always looked to me so similar to an Earth map. It isn't perfect of course, but you can kind of see a space for the Atlantic, Pacific, and Indian Oceans, as well as areas for the continents, to a degree.
Owen Langfield
Owen Langfield 2 ヶ月 前
Coincidence? I think not! The earth is the universe confirmed! Space isn't real it's just a picture in the sky guys!
David Spector
David Spector 14 日 前
@Owen Langfield I think what you mean is that space is not in any way like a convex geologic spheroid. Any similarity in these two maps would have to be coincidental.
Brice Lory
Brice Lory 9 ヶ月 前
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.
leagueofotters 9 ヶ月 前
Hmmm...that sounds a bit odd...perhaps your humors are out of alignment.
Denny Bennett
Denny Bennett 9 ヶ月 前
There's a reason scientific theories are tested so much... They may be wrong. And even if they're right, it may not be in the way they theorised.
Brainfryde 9 ヶ月 前
Seems a bit harsh. While I don't believe dark matter as suggested here exists, I think the search for it is indispensable, as the findings may inspire new ideas. The very term is a lazy tool to describe gravitational fields that have no mass to justify them. "Non-detectable gravitational field deformation phenomenon" is a bit of a mouthful.
hotversus 9 ヶ月 前
@leagueofotters Some bloodletting can take care of that.
C. L
C. L 9 ヶ月 前
@leagueofotters it’s a popular counter point to the existence of dark matter. It’s not unheard of
James Meece
James Meece 8 ヶ月 前
What if we did a similar experiment. Only this time, we put a person who is about to die inside, and see if there are any changes? The idea being to look for a soul. I know is far fetched, and you would have to find someone willing, but "maybe"?
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.
Thomas Neal
Thomas Neal 9 ヶ月 前
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.
Geodesic Interpolation
@Thomas Neal I appreciate the clarification, thank you.
Stefan Baartman
Stefan Baartman 7 ヶ月 前
How long should it take for the Melbourne site to give a significant finding? Are there any updates since you made this video?
UnironicJoe 3 ヶ月 前
The site is in the Stawell gold mine. Not Melbourne
Stefan Baartman
Stefan Baartman 3 ヶ月 前
@UnironicJoe Ok, so how long till Stawell gives a significant finding?
a b
a b 11 ヶ月 前
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 :)
David Dirré-Moire
David Dirré-Moire 11 ヶ月 前
My prediction: A simple discovery by the JWT will finally put an end to DM. Better have a backup plan.
Kai R.
Kai R. 11 ヶ月 前
Beau B
Beau B 11 ヶ月 前
Though, something does not exist until it is proven to exist. It is possible we will "will" dark matter into existence because of how well the concept fixes our problems, but it is due to something different entirely. All so fascinating.
Ray Levi
Ray Levi 11 ヶ月 前
This is not just about it being invisible but also intangible and only interacting through gravity.
StickPFP 5 ヶ月 前
Reminds me of the math video, about how there are some truths that have no proof. Perhaps dark matter is real, but we can never prove it’s actual existence.
Houjous 6 ヶ月 前
What if the edge of galaxies hold an electromagnetic boundary reducing effects from beyond that point making things harder to get in or out of. The reason the outer most matter is just as fast as inside is the same reason the Nascar driver did a wall ride.
Emerald 3 ヶ月 前
"You see it everywhere and it's highly interactive" 🤣 This is one of the best segues I've heard in a while
CalvinB 9 ヶ月 前
The best part of all of this is honestly so simple. These are just guesses. Highly informed and incredibly educated guesses but guesses nonetheless. Space exploration truly is fascinating.
Matt D
Matt D 9 ヶ月 前
That's why science is such a world changing concept. Someone makes a guess, builds an experiment, publishes his findings, his peers try as hard as possible to disprove it with their own experiments, whatever guesses survive the longest are likely to be the most accurate. There is no ego, no "because I said it was so", just... guesses, incredibly educated guesses like you said. Love it
David Spector
David Spector 14 日 前
All of science starts with guesses. The interesting thing is how it get verified through observation and experiment. Otherwise, it would be no better than the insane and unverifiable dogma prescribed by organized religions.
Andrew Wiggin
Andrew Wiggin 9 ヶ月 前
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.
gregor5582 年 前
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
Moin Moin
Moin Moin 年 前
Was about to comment this aswell :D
Felix Victor Münch
Just looked in the comments for that reason 😝 Sounds more French than German I think (as a native German speaker)
Alex May
Alex May 年 前
It's just beautiful. Duncle Muttery.
Raziel 年 前
he pronounced it like it was french ... but people in switzerland also speak german (sort of :P)
mathcat 年 前
should be Duhn-kleh Mah-te-ri-e
Fit_PharmD 7 ヶ月 前
3rd comment: It was really cool to see the physicists excitement at the end of the video about the notion of an entire system of particles we have yet to discover.
amaureaLua 9 ヶ月 前
"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.
Thomas Green
Thomas Green 9 ヶ月 前
This could have some sense, if there were such a thing as dark matter.
qwertyuio1000 7 ヶ月 前
Me: Learns that dark matter exists Also me: is also a Flash fanatic Also Also me: Wonders how to obtain dark matter to get super powers and break science.
Dr. Koupop
Dr. Koupop 2 ヶ月 前
Why does stuff in the universe FEEL hand crafted? It's like the most intricate line of code or something. It just works lol
JokRe 年 前
I have to get this out: "Dunkle Materie" is literally just the German words for dark matter and every letter in it is pronounced in the order it's written and without any alterations
acemad1 年 前
My poor ears
duncan 年 前
dóónkluh ma-tírree-uh
steem lenn
steem lenn 年 前
Besser formuliert als ich es könnte ^^ Ich muss mal kurz meine Ohren waschen gehen.
Conrad S
Conrad S 年 前
a simple Google Translate audio preview could have prevent this
MrMrMrMrMrT ヶ月 前
Or...There is a force that works like antigravity. Would also explain the physics without involving dark matter and dark energy. So this may be the reason we couldn't find anything
Clorpus 7 ヶ月 前
Darn Matter Detector is such a badass name for a thing
FreeHomeBrew 9 ヶ月 前
What of the particles emerging from the vacuum? Could they count towards some of the measurements?
ZMacZ Furreh
ZMacZ Furreh 日 前
Seeing this again, there's also a detectional difference. When speed of the Earth varies being highest in June and lowest in november, anything moving through the electrical circuits along those same paths also changes. Minutely but yes, yearly.
LouisCader123 9 ヶ月 前
That was the most inspirational "At least we tried" I have ever heard.
Rigel 11 ヶ月 前
As a german I couldn't help but burst out laughting when he mispronounced "Dunkle Materie" in every way possible, thoroughly enjoyed it.
oOQCLQo 11 ヶ月 前
It’s a really sad world where people just don’t give a damn if they butcher your language. Great job! It’s not like you can’t google the words for 5 seconds and check the spelling. Unsubscribed!
Lukas Mai
Lukas Mai 11 ヶ月 前
I was looking for that comment. I first thought it was some kind of French term until I realised xD
Night Crow
Night Crow 11 ヶ月 前
Yes! Lets undermine all his hard work to give us as much detailed information and a inside look at stuff we the common people would NEVER have a chance, because he botched a word not of his native tongue! Ingenious!
Green Sombrero
Green Sombrero 11 ヶ月 前
sehr lustig
Johannes Cruyff
Johannes Cruyff 11 ヶ月 前
@oOQCLQo the spelling is correct - just the pronunciation is far off. It is funny - nothing more.
Ruslan Yefimov
Ruslan Yefimov 8 ヶ月 前
What if we've just reached max level of details of our universe simulation and it was simply coded with an error?
Colin McCowan
Colin McCowan 7 ヶ月 前
At the end of the video the dude is asked about dark matter interacting with regular matter, but I thought the only way for us to explain the existence of dark matter is through the fact that it is somehow interacting with normal matter through gravity (ie: stars on the outskirts of a galaxy moving at the same speed as those closest to the center.) What am I not understanding?
JVA 9 ヶ月 前
How can there be two kinds of human beings: the ones that invent cosmic ray detectors and also the ones that shoot people because the french fries were served cold.