Are Axions Dark Matter?

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What does the strong nuclear force, the fundamental symmetries of nature, and a laundry detergent have in common? They’re all important parts of the tale of the axion - a tale whose end may take us beyond the standard model and solve one of the most vexing mysteries in astrophysics.
Hosted by Matt O'Dowd
Written by Matt O'Dowd & Graeme Gossel
Graphics by Leonardo Scholzer & Adriano Leal
Post Production: Yago Ballarini, Max Willians, Pedro Osinski
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber
The story of the axion is a classic physics tale: intrepid scientists delve deep into trackless mathematics in search of answers to a mystery. And there, against all expectations, they find the hint of a completely new and unexpected denizen of the natural world. In this case the mystery was a subtle inconsistency in the behavior of the fundamental forces. And the unexpected discovery? A brand new particle - the axion - which, while not proven to exist, may explain a much more famous conundrum. The axion may explain dark matter.
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11 févr. 2020




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Commentaires 1 474
Manu V
Manu V Il y a heure
Do I come here just to feel dumb!?
Art Il y a 2 heures
Had to downvote after the first two seconds :(
Bill McDonough
Bill McDonough Il y a 4 heures
Matt, just to 'nerd all the way': the great apes (or Hominidae) are a Family within the infraorder Simiiformes... the monkeys. So strictly, all apes *are* monkeys. Catarrhini 'Old World' monkeys, in fact.
Gabriel Desmarais
Gabriel Desmarais Il y a 4 heures
I guess it is official, we can't out-nerd Matt.
Kez Il y a 4 heures
Can you be straight and wear a pink shirt into a gay bar?
Jason Williams
Jason Williams Il y a 6 heures
How can observable time not affect observable mass
Nicolás Celedón
Nicolás Celedón Il y a 7 heures
Did anyone read axioms and thought 'those damn matematicians'
gusthebroken2 Il y a 7 heures
Jargon that no one understands .
IBIS INFINITUS Il y a 7 heures
So I have a question... Do black holes change the topology of the fabric of space-time?
Toni Kotinurmi
Toni Kotinurmi Il y a 9 heures
Doing physics in univ, for example speed of light (yeah, 30 years ago...) tests with rather strong lasers etc it was OK if we hit within 1e10..15 - just as long as we explained where error marginals came from. That latter part is more important than hitting target. So come on... If you measure something, do it again and again in different ways until you say it's inaccurate.
Sammy Smith
Sammy Smith Il y a 10 heures
You and the guy from Ancient Aliens are my heroes, so good information.
Vistico93 Il y a 11 heures
An infinite universe means I would have an infinite number of tries to get my life right though only in an infinite number of them will I start off with memories of my previous attempts to do so...
Nick Moraitis
Nick Moraitis Il y a 12 heures
We can only need out to the fullest extent of our own universe.
Mich ael
Mich ael Il y a 13 heures
Next video: Are VPN services dark matter?
C Apt
C Apt Il y a 14 heures
Answer below: How many seconds before you are lost on this video?
BuhuBaha Il y a 15 heures
In the Lagrangian at 5:17 in the last term one of the alphas should be a covariant index (: * Full nerd mode off * Great video though!
Ri4s co
Ri4s co Il y a 16 heures
What if dark matter is just an effect of dark energy pushing on gravity
TheExpatpom Il y a 16 heures
If axions, assuming they exist and are the dark matter physicists have been looking for, are produced in the core of fairly unremarkable star like our sun, is the next question why the stars in those dark matter free galaxies that have been discovered haven’t been producing axions? For that matter if loads of axions were produced during the Big Bang wouldn’t we expect them to end up in the same regions and structures as ordinary matter, and for there to be no galaxies without them? Or is there a possible answer that’s the subject of a future video?
Mainland Empire Records
Mainland Empire Records Il y a 19 heures
AHHAHA nerd all the way. Cone'd a phrase.
Fundemort Grey Prime Defender of Truth and Justice
But Sheldon got his Nobel from Super-Asymmetry theory. (this is obv just a joke).
Mainland Empire Records
Mainland Empire Records Il y a 19 heures
I love this show. I started watching in 2018, and I haven't stopped since. Thank for you incredibly high value content.
Tripcore Il y a 20 heures
More 'infinite' nonsense
Tripcore Il y a 20 heures
Physical Value zero = virtual. Value of zero in physical world = does not exist.
Tripcore Il y a 20 heures
PBS: Aka 'nothing' Also pbs: 'nothing doesn't exist'.
jojolafrite90 Il y a 22 heures
I really don't believe in the existence of what they called axions. And even less in "WIMPS". There are better solutions to our physics problems and we will understand one day. I do think we are limited by the realist view on what we observe, it's still a too common interpretation among physicists. And the fact that they all want to invent solutions to problems between what we can verify and what we expect to verify in a way that they seem to want our universe to be a closed system that exists in itself, and is not part of anything more.
Tuco Benedicto
Tuco Benedicto Il y a 23 heures
I understood some of these words.
Relbl Il y a 23 heures
As long as you are on the "String Theory" path then we all know this leads to nothing... it's been 40yrs and no progress or discoveries. Is physics so sclerotic nowadays? or is it the sciences in general...?
Genildo Miranda
Genildo Miranda Il y a 23 heures
OMG I am so dumb...
Igor Tolstov
Igor Tolstov Il y a jour
Physicists just love to make up different constants, fields, and particles to plug in holes in what they don’t understand
Poultryphile Il y a jour
Would the duplicate universe have a duplicate Matt presenting another, equally awesome, Spacetime show?
Gordon Gecko
Gordon Gecko Il y a jour
Hey Tyrion Lannister are dragons real?
Captain Caveman
Captain Caveman Il y a jour
Hmmmm did I just see you on "the way the universe works" ?? Does the universe have a boundary episode.
Punk Patriot
Punk Patriot Il y a jour
This video, my level of understanding kept oscillating between feeling like I am starting to get it, to feeling like you are speaking Klingon.
stat a87c
stat a87c Il y a jour
I hear alot that a quantum fluctuation is suspected to have sparked the big bang...but there was no space, and therefore no time before the big tf can something fluctuate without time, and without a dimension to fluctuate in??
Faint Il y a jour
drink everytime he puts his hands back together
Supersad Cat
Supersad Cat Il y a 11 heures
Okay, even chickens can join Team Cat.
Gareth Wigglesworth
do black holes contribute to the expansion of space time?
Division Zero
Division Zero Il y a jour
the frame rate was a bit of annoying ngl
Follower of Julian
Follower of Julian Il y a jour
16:08 Latin pronunciation changes over time and from place to place. This is a problem singers face constantly. It's sad that, for all the great work that you do, THIS is all people notice! Μὴ δῶτε τὸ ἅγιον τοῖς κυσὶν μηδὲ βάλητε τοὺς μαργαρίτας ὑμῶν ἔμπροσθεν τῶν χοίρων μήποτε καταπατήσουσιν αὐτοὺς ἐν τοῖς ποσὶν αὐτῶν καὶ στραφέντες ῥήξωσιν ὑμᾶς.
Leslie Schwartz
Leslie Schwartz Il y a jour
A complete total fantasy speculation, this isn't science.
MikeOfNotts Il y a jour
You are looking for a useless cloud of matter that is only big enough to fill the hole in your equations. Maybe it's bigger that that.
Reyna Lindström
Reyna Lindström Il y a jour
the last one was so funny!
LashknifeTalon Il y a jour
Good job guys, we made him give up on pronouncing that thing that Newton wrote.
Kazimir Il y a jour
Could someone pls make a anthropomorphized cartoon about quantum particle behavior to make this understandable? There is so much going on in nearly anything. From vacuum to simple atoms. Quarks, Leptons, Bosons and so on... I'm clearly not able to imagine what is going on anymore. Sure, I could eat some shrooms, but damn. Can anyone put this together to make a clear image to look at? Like oldschool 60's atoms, just by modern standards. I have seen so many visualizations of "this", but it is really hard to put it in some context. So how many dimensions do I need to understand gravity in its simplest form - 11?
W_Sindarius Il y a jour
Nice video, as usual, but I wish you guys would lose the music. Makes it seem less ... authentic.
Anthony Scott
Anthony Scott Il y a jour
Super nerd mode transforming that motivational learning into moral intention to direct application, while saving lives and souls. The purpose. Boundless Nampakkai
Nuzen Il y a jour
Can axions explain quantum entanglement?
some dude
some dude Il y a jour
No need for dark matter, jesus christ. Your model is wrong if it requires dark matter.
KillaG FPV
KillaG FPV Il y a jour
there is no dark matter. lol
Mumbly Il y a jour
I'm surprised nobody mentioned the spooky Axion at a distance...
Dapper Wolf
Dapper Wolf Il y a jour
Also, this has to do with the multi worlds episode you did. If you go fast enough In our universe, they say it's possible to go back in time. But is it possible to go so fast that we end up in another universe?.
Dapper Wolf
Dapper Wolf Il y a jour
Couldn't you get an AI computer shootout synthetic particles? Interact with The vacuum and Fort to record each and every interaction, With each individual particle?
Herman Dryer
Herman Dryer Il y a jour
Itachi Uchiha
Itachi Uchiha Il y a jour
Finally!!! After watching this episode second time I got it.
Hayden McKenzie
Hayden McKenzie Il y a jour
you guys have a lot of really good looking thumbnails, and then i see this guy and i just cant listen to him. its a real downer since id love to watch your videos sans this guy
David Il y a jour
I don’t think so, axioms are things they have in maths
lasso atrain
lasso atrain Il y a jour
No light if caught in a field and and can no longer travel the speed of light then can no longer be considered light . The property of light says light travels 186,000 miles a second in a vacume, if it doesn't then it must be something else .what was it before it became light ? Simple energy, potential energy .I think anything can be light if accelerated to the speed of light. Perhaps if trapped in a field it can not release it's energy as heat because there is nothing to transfer it too so it precipitates out as some type of particle .Perhaps dark matter .Perhaps as the elements it was before being accelarated, perhaps that's why the elements can be known within a star by analyzing its light or by slowing it below the speed of light in a field.
Tony Barrera
Tony Barrera Il y a jour
Nice that axions are found we had already predicted their existence.
Angel White
Angel White Il y a jour
If energy is made up with a plus and negative could this be what is making the expansion of space and time.... This dark matter... All rotation of the galaxy's all the energy.......
Vivek Joshi
Vivek Joshi Il y a jour
"Axion Detergent"...Scientists are funny.
Supersad Cat
Supersad Cat Il y a 11 heures
I know you are a wolf, but would you like to join Team Cat? ...a cat
david Williams
david Williams Il y a jour
Maby theirs so many axioms that arnt moving that they stop eachother and cant travel