What If The Cosmological Constant Is NOT Constant?

[@isaacbrown4506]

It's pretty crazy thinking i used to watch children's shows on PBS on my big boxy TV as a kid, and now i watch grown-up stuff on PBS on my phone.

[@isaacbrown4506]

@joshuasheets9236 lmao not quite, I'm only 27. I do remember gas being under a dollar when I was a child living in Kentucky though.

[@WhitefirePL]

The world is getting smaller :D

[@BriarLeaf00]

Same.

[@isaacbrown4506]

Holy crap I got the ❤️ from PBS 😮

[@profkingthing]

They're definitely offering a public service, and I'm grateful. Even moreso considering the international audience.

[@reinux]

I'm so proud, I've been watching Space Time for years and I finally understand an episode in full

[@scottdahneke1031]

Impressive, most impressive.

[@katakana1]

Now, time to graduate to the channel Sheafification of G and start all over again!

[@jinstinky501]

Lol, nice

[@kaczan3]

I've also been watching Space Time for years. My favorite ASMR channel.

[@JHaven-lg7lj]

That’s my goal, too! I’ve come pretty close a few times, and I’m going to keep trying 😄

[@wdavis6814]

DESI is a really impressive piece of scientific engineering.

[@winonafrog]

Yes! 7:14 ive rarely felt more insignificant than knowing somehow this was designed and those robots are out there measuring this much data

[@ChaineYTXF]

The Baryon Acoustic Oscillation was superbly explained. Thank you.👍😎

[@tumultuouscornucopia]

I'm so glad he gave the warning at 14:00 about this not yet crossing statistical significance. I had got so excited that I was about to make a whole string of life decisions based on this finding. (I'm sure you can imagine the sorts of things).

[@richteffekt]

Good call. You don't need my 1998 in-an- expanding- universe- real- estate- prices- will- only- ever- go- down debacle all over again. Wait for statistical significance and do not ignore the specifics of the local group, just saying.

[@maciejbala477]

yeah, I really like that PBS is not sensationalist and tries to be sober and conservative with the topics it talks about

[@196cupcake]

Is matter constant and only space expanding? Or, are both matter and space expanding? If it's infinite, how could it have all been one point? Wouldn't the big bang theory mean at least matter is finite, and maybe also space?

[@tricky2917]

Where do you even find a string theorist nowadays?

[@jonasdaverio9369]

@@tricky2917 Probably in most theoretical physics departments, I guess

[@CristanMeijer]

14:22 Wow, in a few years we'll know the redshift of 40 million galaxies and quasars. What a time to be alive.

[@TheTonyMcD]

Just two more papers away

[@Renatus_Eruditus]

Hold onto your papers folks

[@unvergebeneid]

Change in acceleration is called jerk. So we're looking for the ultimate jerk in the universe.

[@GothAtheist]

Who, you mean Carl?

[@accidentalengineering]

Underrated comment

[@TysonJensen]

@@GothAtheist 🦙🦙🦙

[@garynicolson5192]

snap, crackle and pop are the next 3 derivatives. Learned that from Sean Caroll.

[@prezlamen7906]

Youre such a change in acceleration.

[@newrev9er]

I can't believe videos like this are available to us for free. What an incredible age this is.

[@Surly_Mermaid]

The joys of PBS

[@PeterKnagge]

The WWW isn't free... Oh, and do you want to buy a t-shirt??

[@zetopr8058]

I do bc I want to support them, others can watch for free tho ​@@PeterKnagge

[@chrismpbuchholz]

The only universal constant is how great your videos are 💯

[@Kohl293]

And π

[@TactileCoder]

No you're great 😌❤️

[@Deadassbruhfrfr]

Awh 🥺🥺💕💕💕

[@martincox9691]

That, and the fact that I’m lost three minutes into a PBS SpaceTime video. That’s pretty constant, too.

[@Yora21]

Also not constant. It's getting bigger.

[@diga4696]

Got my blanket, my hot tea, my weed, northern lights on a comfy couch outside.. enjoying some good ol' space time

[@winonafrog]

northern lights squared, sounds cozy

[@impromptu24]

Paraíso

[@veritas41photo]

I went outside at 04:30 and saw a totally clear sky, Orion, the Dipper, and all the rest of the Northern sky. It was close to freezing, so I retreated back indoors, but it is a great memory.

[@HebaruSan]

Thank you for explaining where the primordial sound waves came from. I think this is the first time I've understood that.

[@halsteadart]

I want to see an episode of SpaceTime that wraps up the last sentence without saying "spacetime," and Matt starts to walk off-screen. Then at the last second he pokes his head back in and just says "spacetime"

[@demondoggy1825]

My favorite game is trying to figure out when the spacetime name drop is going to occur.

[@LuisSierra42]

That would be hilarious

[@BierBart12]

Hey PBS, Spacetime here!

[@corsel6911]

​@@BierBart12Michael?

[@paulramsey2000]

@@demondoggy1825yeah, I've gotten good at it. You can just feel the sentence structure or tone of voice indicating he's coming in for a "landing".

[@handle-f5h]

Thank you for all you do Matt.

[@SterbiusMcGurbius]

Glad you edited that profound thought to clarify things for me

[@NewMessage]

As long as y'all remain a YT constant, I'm happy enough.

[@OtherTheDave]

The title is a question I’ve been wondering about since I first heard of it.

[@Mechella56]

Same

[@firefox8713]

What if the very thing that Einstein thought he was wrong which was later discovered to be right after all, was actually wrong, making Einstein right on his mistake after all.

[@MaryamMaqdisi]

​@@firefox8713 Einstein can never lose this way, clever rascal

[@hardboiledfrog]

What a trip. I've been watching since the beginning and I still think of Matt as the new guy, but I just checked the dates of Gabe's first and last videos. Gabe did 6 months while Matt is approaching 10 years. My sense of time is wronger than wrong.

[@camp44mag]

Well done, Dr. O'Dowd and PBS Spacetime! That was well explained, and the simple graphics and subtle ambient music were non-distracting. Even an empty head like me could follow along somewhat well. Also, the new Specetime logo intro theme was groovy.

[@dragonfiremalus]

Wow, the presented method for discovering those acoustic rings is astounding, epic, and would have required a ton of computation! I love it!

[@tnspnk3]

Fortunately, we live in a time when we have routine access to tons of computing power. A high end consumer laptop (or even more so, a gaming desktop) has enough computing power to run numerical methods that were beyond the reach of university mainframes when I was back in college. We can do astounding things computationally.

[@Ratgibbon]

1:18 Two lambdas, if you add one more that's three. Half-Life 3 confirmed.

[@wasnr]

And the nerds shall have their revenge.

[@lyrimetacurl0]

Half Life 3: Game Over

[@bakedpotatojoe]

Favourite youtube channel ever please never stop posting

[@herrvich]

When he said we get the complete data from DESI within a few years I realised PBS Space Time might not be around to tell me about the results and I cannot pretend to understand anything.

[@bakedpotatojoe]

@@herrvich fr every night i wake up in a cold sweat from a nightmare about the demise of PBS Space Time 😞😞😞

[@anthonyhiggins7409]

It’s definitely among the very best of its type on KZbin.

[@DominatorHDX]

This and History of the Universe channel

[@dominikbeitat4450]

The (observable) universe is finite, so there's a finite amount of things to teach. I'm afraid Matt and PBS Space Time are fated to eventually stop posting one day.

[@Mentaculus42]

11:02 Thank goodness, I was really sweating the “BIG RIP”, so RIP BIG RIP‼️

[@winonafrog]

Now im thinking “BANG!” “RIP!” “CRUNCH!“ like the universe is an old Batman episode. 😅

[@zacnewman7140]

"What do we say to the god of death?" "Not today." Sadly we can't put that marker on The Big Rip's grave just yet.

[@TheTurbobond]

Panning cloud is an awesome upgrade to a show that just keeps upgrading. Love it!❤

[@Delekhan]

As always, an excellent and informative video. I've always loved watching science related PBS shows but Space Time really opens up the wonder of math and physics and shows the capabilities of humans. It still amazes me that we know so much about our universe. Thank you so much! I still wish I could go back to school and become an astrophysicist.

[@teardrop720]

This channel is the best source out there on cosmology updates for the lay person! Truly grateful 🙏

[@Paul-A01]

Pro: this may be a new phenomena in physics Cons: it may give string theorists more material

[@TestTestGo]

Material is good. If it supports them, we might be getting closer to a deeper understanding. If it conflicts, the theories can be abandoned. Without more material String theory is stuck in this limbo of "well yes that's all very interesting and it might resolve a problem or two, but how can we test If it's correct?"

[@Paul-A01]

​@@TestTestGoi mean it will energize them and motivate them to waste more time

[@Summonergeek]

String theory needs to be relegated to the private sector.

[@morscoronam3779]

​@@TestTestGoYou missed the "Laugh at the joke" cue. Well, I'm pretty sure he was joking at least. 🤔

[@Summonergeek]

@@morscoronam3779 I'm pretty sure most in this comment section have lost the plot.

[@vlaaady]

I really recommend this channel for those mid day nappers who need good background noise they cannot process anyway.

[@850t5m]

Wouldn't they very fact that inflation occurred, proves that the expansion constant has changed more than once (1. Initial inflation 2. Post inflation) and would it be a fair assumption to make that since it has changed that it maintains potential to change again for any number of reasons?

[@user-sl6gn1ss8p]

Yeah that always bugged me

[@aaronb1195]

I might be wrong, but I don't think that early-universe cosmic inflation is postulated to have been caused by the same phenomenon as the dark energy causing the current accelerating expansion.

[@celivalg]

So the first inflation could be caused by a separate solution from what causes regular inflation, the cosmological constant only aims to describe the current inflation rate, not whatever caused the first inflation. So when we talk about a constant inflation acceleration rate, we mean the part of the inflation that is happening right now, not the first one. Also the first inflation is mainly here as an explanation for a few different problems, and require an inflaton quantum field which would have been stuck in a local minimum energy density during the initial inflation, whereas we don't know what actually is the dark energy we encounter. It could be the same inflaton field or another one with an energy minimum at whatever dark energy is supposed to be at, but it could also be any other of the wild theories that have been thrown around. Not a physicist, just a nerd

[@850t5m]

@@aaronb1195 I think that if the cause of expansion changed that means the potential for it to change again would be a logical conclusion. It allows for any particular constant to be present no matter what the current cause is.

[@850t5m]

@@celivalg Sure, I'm deliberately being slightly reductionist. Though if we are looking at if the cosmological constant has changed over time, I think it's useful to point out the universe has expanded in the past for 1 more more reasons, which means the rate has changed at least twice and there is nothing to suggest it couldn't again.

[@Biga101011]

The BAO rings on the CMB made a lot of sense because the CMB was mostly a sudden snapshot in time. For the BAO measured in galaxy distributions, I would have expected a 3D spherical shell rather than a 2D ring aligned with a redshift.

[@user-sl6gn1ss8p]

that would still leave 2D rings though, wouldn't it? In the sense that from any given point of view the "borders" of the sphere from that point of view would look denser.

[@Biga101011]

@@user-sl6gn1ss8p Absolutely. Though you wouldn't know if that redshift corresponded to the diameter or a slice through a spherical shell closer or further which would always be smaller. But yeah that's a good point, if they can show it's the largest then that ring would be all you need.

[@jmarvins]

It is a 3D shell: that's why they find this correlation by measuring distances to the center - that is, distances in 3D, not the 2D image we see from Earth. The 2d rings are just a diagram (and are how it appears in the CMB, which is a frozen 2d surface of a 3d shell at the Hubble distance).

[@rtg_onefourtwoeightfiveseven]

As jmarvins said, it is a 3D shell, and in fact part of the DESI paper's calculation is comparing how deep the shell is along line-of-sight with the angle it makes on the sky (because these are measured in different ways).

[@HeIsInfinity]

Been waiting for this episode 😂🤍

[@walksinrain]

I have been waiting for this exact topic from you since hearing rumblings about this crisis in cosmology for a few months now. Excellent, as always Matt, and PBS Spacet Time team. I always wanted to be a cosmologist but a different path in academia is unveiling itself to me. Through these videos I feel like I can still stay close to the current topics of cosmology on a level higher than just a basic one.

[@Coby_Got]

Needed this right now. I had hit the end of KZbin.

[@klauskervin2586]

Thank you Matt and PBS Space Time for continually producing quality content. I appreciate all the work that you do.

[@simonchung9813]

Big Crunch: "There's no stopping me!" Heat Death: "Hold my cosmological constant"

[@mariowolczko1396]

These videos are so much better than any science coverage on actual TV.

[@faenethlorhalien]

And, next time, "What if it's not cosmological?"

[@bennyhollis9679]

I love how we're constantly finding out new things about ourselves and the universe we live in. Great new merch too! :)

[@Raykkie]

What if instead of everything being destroyed during a Big Rip, Quarks just started coming into existence faster and faster as the expansion of the universe tries to rip them apart, causing a new Big Bang at every point containing a group of quarks?

[@veritas41photo]

We continue to reach for the truth! Great Stuff! Please keep up the great work, Matt and team!

[@osmosisjones4912]

Some experiments show sound to have affects of negative mass

[@meinbherpieg4723]

This was great. Thank you for everything you have done.

[@Batmans_Pet_Goldfish]

I'm not sure why we'd believe that the expansion of space is universal. Gravity doesn't affect spacetime universally, it's local. Why would the expansion of space be any different?

[@PhilipMurphy8]

Thursday is always a good time for PBS Space Time

[@jssamp4442]

I can't believe I just passed nearly three hours reading and responding to comments under this video. It is so interesting that my clock got faster or something. Excellent video on a fascinating topic. Cheers, Matt!

[@vitorgracia5113]

Do one on NEGATIVE TIME , NEGATIVE TIME! Best episode I´ve seen so far.

[@ericwadebrown]

What about the recent James Webb confirmation of Hubble and Spitzer's confirmation of a 74 km/s. Then a discovery of 3x type 1A supernova - SN H0pe which shows that even 10 billion years ago, the hubble constant hasn't really changed.

[@tonywells6990]

You mean the Hubble constant that constantly changes? The Hubble constant 10 billion years ago was much higher than it is now, but then that depends on whether you mean the Hubble constant now (H0), or its value back then. Confused? That's why cosmologists prefer to call it the Hubble parameter.

[@sepiar7682]

Wow really interesting video, can't wait to hear more statistically significant findings from them!

[@JonoSSD]

Big Crunch? Big Crunch!

[@lyrimetacurl0]

Crunch!😬

[@blijebij]

I always love your presentation of knowledge&science! Thanks ;)

[@alphaofthebetas4780]

I only understood about 3% of this video, but what I did understand blew my mind.

[@ericstromquist9458]

A very good, careful explanation of an extremely complicated observational problem.

[@TheLeftistCooks]

A brand new fresh Space Time! What is this, the big bang? - N

[@robinsparrow1618]

green name spotted (thanks)

[@spheise252]

This was a great episode. In my view, because the focus is on ideas and not math.

[@XuryFromCanada]

Man any time we assume the possibility that some physics constant is not constant, I kinda give up believing what we can know about the universe by rewinding the laws of physics billions years into the past. Like bruh back then we had electroweak force , how do we know what else was different

[@TestTestGo]

More Science! Current theories are always the best model we have for what is, was and will be, based on all the evidence humanity have been able to collect to date. Nothing more, nothing less. A good scientist should always hold their beliefs tentatively. Always ready to be proven wrong, but also confident that the current scientific understanding is the best available at this time. This built in self doubt is what seperates science from other ways of knowing things, and is why it is the superior tool in the search for truth.

[@marcag9810]

Well we can never "know" anything at all in a post-Kantian world. Science just makes progressively more precise and predictive models that coincide with our observations, that's all.

[@Deeeznuuts4yoou]

Exactly!

[@eryqeryq]

It'll be wild if we ever find evidence that the laws vary slightly over large distances in space as well as time, but for now the two are basically synonymous because we can't see what things are like "now" far away.

[@DiogenesCaulfield]

@@TestTestGo as long as your going to pay for your escapades you can call it what you want, but I'm calling it mostly the PhD pyramid scheme

[@caseyf6513]

I loved that weathered show! Also that app is way worth it for the documentaries alone

[@GothAtheist]

Change can change. Change is changing.

[@morscoronam3779]

But war... War never changes.

[@sweepingdenver]

Old and busted: Bowie’s Changes New hotness: Yes’s Changes

[@yuvrajdas9552]

Yep, even Pauling used all the physical constants in some function to get the dimensoon of time and got a number close to the age of the universe. Does this mean the age influences the "constants"?

[@Flesh_Wizard]

Yeah, ok Tzeentch

[@k_a_bizzle]

@@morscoronam3779* *helicopters flapping away in the distance* *

[@lightlegion_]

You’re offering something unique!

[@Roman.Villain]

If it’s a proper Big Crunch due to the reversal of dark energy, how many times have we done this? Imagine just looping back and forth for endless eons and not knowing.

[@frun]

Universe is not expanding. It can be seen with acoustic relativity/analog gravity.

[@molag-ballordofdomination2065]

I think a big bounce would be the best scenario, static universe and everything gets boring, expanding and you get the heat death or the big rip, reverse expanding and it crunches back down to a singularity, but if it is a cycle like the bounce, then new universes with new rules are made every once in a while

[@MrAngelos006]

my theorie is that our univers is a 4 Dimensional structure collapsing into 3 Dimensions. As an analogy, its like a 3 Dimensional Sphere of water hitting the ground and "collapsing" into 2 Dimensions, spreding out in the floor until its "2 DImensional". That would mean that the expansion of the universe depends in which direction we look.

[@Toddis]

His shirt kinda looks like UFO mushrooms

[@crabnebula7457]

It does look like if I got too close that it would punch me with astonishing gusto.

[@DreadEnder]

Space penises. If you get the reference good job.

[@dxtrum]

I see it

[@askani21]

Unidentified Fungus Object?

[@KamielDV2]

Reminds me of that one Boston Album with the Guitar UFO's

[@vadymkvasha4556]

Despite I've read, watched and learned a lot, I'm still amazed by science and it's ability to predict things. Isn't it amazing, that we predicted those rings, then looked up for them and BANG - there they are! Same for CMB and a lot of other!

[@scottryals3191]

In as much as we cannot see the entire universe, as far as we know, the universe is still being created. Not seeing past the CMB does not mean that there's nothing on the other side. What we think of as the beginning of the universe could just as easily be a local event in a much larger, much older, universe. Eternity is, after all, a very long time.

[@TheFuryOfTheAvocado]

Yay!! The big crunch yet lives!!

[@jajssblue]

Proposal to pronounce B.A.O.s as Bao like the Asian food buns. Steamed rice buns are circular like B.A.O.s, so I think it's fitting. :)

[@Epicmonk117]

Grrrr… Now I’m hungry…

[@ajmalboodhun6875]

From a bit of googling and asking my wife who studied mandarin, the pronunciation of bao is pao in mandarin and in the rest of the world since it seems to originate from portuguese and is only pronounced bao in the US. So it would only lead to arguments any time the B.A.O.s are mentioned.

[@jajssblue]

​​@@ajmalboodhun6875 Uh... Everything I'm looking up shows that it's pronounced how one would expect. It's also how I've heard it pronounced from my Chinese family members. So ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯

[@rwarren58]

You guys don’t get it yet but I love the positive vibes of this thread. 👍🏿

[@chronixchaos7081]

Why do I want the universe to end in a Big Crunch and not in a Cold Death or Big Rip? It’s not as if I’m going to be around.

[@DeepeningTheListening]

Because it's comforting to know that there's a possibility for new life even if we are long gone. Plus, it would also kinda explain where the Big Bang came from. I'm also team Big Crunch in a very unscientific way. 😄

[@zandromex8985]

Because we take solace in the little possibility that we may, one day, have a chance to redo our lives. Every one makes mistakes and everyone has regrets. Even if dark energy reverses and there´s a big crunch there would be absolutely no gurantee of the chance of a retry, but if there´s one thing the brain´s great at it´s clinging to the littlest bit of hope.

[@tovarischkrasnyjeshi]

We might like the idea of things going beyond us, innately, for evolutionary reasons. Big Crunches seem more symmetrical, so it might appeal to the sense of us wanting things to continue indefinitely instead of stagnating forever in a big rip (and it's at least more intuitive than a Penrose-y CCC ending).

[@mattmexor2882]

Did he say the assumption of constant acceleration could be wrong? What a jerk.

[@jpowelltheowlcolumbia4579]

“A type of supernova, Type 1a supernovae” @3:02 Beautiful

[@chrismuratore4451]

While I cannot confirm with maths, intuitively, it feels like Dark Energy is just an emergent property of the interaction between spacetime and presumably, matter.

[@oberonpanopticon]

Intuition is famously inaccurate when it comes to things that aren’t readily experienced on earth

[@TestTestGo]

Intuition would say quantum physics doesn't make sense. Careful experimentation however would strongly disagree.

[@mike74h]

@@TestTestGo Still doesn't make sense... True, but nonsensical!

[@melm4251]

one of my lecturers worked on this paper and is an expert in BAOs, i'm privileged to be able to bug him regularly about cosmology!

[@AABB-px8lc]

6:16 dafuk I was wondering since forever why even on on my primitive astrophotos so many strange almost perfect circular star things. That is it !

[@tonywells6990]

No. The BAO rings are not at all visible. Although if you're joking then try adjusting your focus!

[@fryguy5134]

Thanks for another great video! Love you all.

[@trumpingtonfanhurst694]

I'm hoping for the Big Crunch - endlessly repeating. This would mean the Universe would last forever in the cycles, a kind of immortality for the Universe, and also for us, as there may be an infinitesimal part of us all in it, always 🙂

[@jbone13131313]

Awful. Infinite holocausts? Infinite suffering? Repeating the same awful things over and over again ad infinitum? Truly an existential nightmare.

[@jericho_shepherd]

@@jbone13131313 There are always good things and bad things. Like puppies and misanthropic pessimists like you.

[@zandromex8985]

@@jbone13131313 Quantum mechanics likely means the passing of time is non-deterministic, meaning each new cycle of the universe would most likely be different from each other. This whole ordeal is highly hypothetical tho and such hard to argue about.

[@sverebom7069]

@@jbone13131313 cyclical cosmology doesn't have to imply that all of this happened before and will happen again.

[@TestTestGo]

If the cycling is infinite and the distribution of matter is randomly determined each time, then every possible arrangement of matter would happen an infinite number of times, including the current state of the universe. There will be another you, exactly the same reading this comment, an unfathomable distance into the future. Infinities are weird.

[@NathanielLawson]

Amazing. Just to understand. How wonderful.

[@SciFiMangaGamesAnime]

No Heat Death? Honey, I cant join you, I have a bearded man to watch!

[@MichaelNiles]

The cosmological constant not being constant seems to be enough to explain that dark energy is emergent, and that the rate of time that passes in the void between masses is faster than the rate of time passage closer to mass, causing it to appear that the space between masses is growing. I'd argue though that it still suggests the heat death of the universe as an ultimate fate of the universe, as that expansion grows more aggressive eventually gravity nor the strong nuclear force will be enough to keep anything together. This would also be akin to a temporal singularity - at which point time will cease to exist as nothing will be able to "communicate" to anything else even on the smallest of scales, completely eliminating change all together.

[@jaredkiehlmeier6460]

First

[@googleaccount5225]

The video I have been waiting for!

[@seanhewitt603]

Light travels through time the way sound travels through air... And, yuh, I smoke cannabis.

[@Khashayarissi-ob4yj]

👏👏👏 So excellent and beautiful episode. Thank you, Doctor, your scientists and your colleagues. and With luck and more power to you. hoping for more videos.

[@ericjome7284]

Why are we not still experiencing the inflation of the early universe? Doesn't this imply that the forces causing expansion definitely did and maybe are changing?

[@lomiification]

Yeah, doesnt the big bang inflation show that it's not constant?

[@THE-X-Force]

We are still experiencing it.

[@EinsteinsHair]

One idea is that inflation was a phase change, a one-time discontinuity, somewhat like how water can change from steam to liquid to ice. This video is suggesting a smoother change over time.

[@janmelantu7490]

13:36 “the acceleration rate would have to _increase_ to resolve the tension, not decrease” the crisis in cosmology keeps getting worse despite all odds

[@LordMarcus]

Anthropic arguments aren't arguments.

[@jo_crespo11235]

Excellent video, keep the hard work going.

[@ZeHoSmusician]

I'd just like to say that I love slow-moving star field used as a background. 😊

[@mikeluque6527]

The science of what can be learned from the CMB is absolutely bonkers!

[@dragonmaster363]

Please never stop making episodes

[@jonathanskurtu7384]

The Cosmological Constant That Usually Works Anywhere And Does Sometimes Throughout All Dimensions: Is E=MC^2

[@mikapeltokorpi7671]

This is the question I asked already a few years ago.

[@PureScienceYT]

I just finished watching every single video on this channel. Amazing content. I'd like to go deeper into quantum mechanics; any suggestions on how to proceed from here?

[@narfwhals7843]

Check out Professor M does Science. They have a fantastic series on rigoroud quantum mechanics.

[@krzysztof3897]

One thing that limts us is time which is our tiny piece of conciousness about all of this. If we survive long enough we will decypher the simulation

[@DeclanOHara-vx2ql]

Matt is such a legend

[@Tutul_]

fun fact: thursday I saw a poster in my University about a talk on that specific subject (the paper). But I couldn't be there so I'm happy to see an episode on that exact paper. Also, the image for that poster was a combination of the telescope for redshift, the "redshift map" shown here, and the CMB.

[@sindju]

that sound stuff is crazy!

[@bigsarge2085]

Fascinating!

[@ohnomarcia]

Fantastic content, can’t wait for every video

[@WernerBeroux]

Isn't it just impressive how it feels that there is always just enough clues to move forward without ever having a full dead end? We don't know yet what's before the big bang, but who knows whether we may one day be able to find that out or not.

[@victorfranca85]

Best merch yet

[@nagcopaleen9078]

12:48 On the topic of stable universes within the string landscape & their requirements-I'm curious what "stable" means here. Since observing dark energy diminishing would be exciting for that branch of theorists, I am guessing the theory says our current experience of the universe would be impossible in an "unstable" universe-so is it that those unstable universes can't form at all, or that they have infinitesimal lifespans, or...?

[@robbabcock_]

Potentially incredible new science!

[@Markoul11]

There is also very important the Euclid satellite mission going on that also concentrates on measuting very accuratelly the state of the vacuum parameter ω. We will have the firat results in about 5 years.