Dark Matters: Have We Really Failed To Identify Most Of The Cosmos?

How confident are we that most matter in the universe has so far escaped detection? And if there is dark matter, might there be dark stars and even a dark big bang? Leading physicist Katherine Freese joins Brian Greene to explore these dark matters.

Participant: Katherine Freese
Moderater: Brian Greene

00:00 - Introduction
02:18 - Participant Introduction
03:09 - Brief History of Dark Matter
06:42 - The Case for Dark Matter
15:32 - Investigating Dark Matter Candidates: WIMPS and AXIONS
22:34 - Identifying Dark Stars
26:52 - Dark Big Bang
31:25 - How Our Knowledge of Dark Matter Has Improved and How Do We Do Further Research?
33:09 - Credits

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[RandytheTraveler]

Please put the date of talk in future episodes.

[aceofdatabase]

The most engaging WSF —from start to finish—I've seen in some time. :)

[anthonycarbone]

Fascinating discussion and I am in amazement that so few people have watched this. This discussion is at the forefront of current physics and needs hundreds of thousands of views. Not only does this greatly diminish the idea of MOND (Modified Newtonian Dynamics) capturing the spot light and replacing Dark Matter but it offers other intriguing theories that might reveal the truth of the matter.

[ArleeMyers-vpco]

I always enjoy watching Katy Freese. Oddly enough I'm currently about 3/4 of the way through her book "The Cosmic Cocktail" right now, and also about half way through Brian Greene's book " Until the End of Time" so this video was a special treat. Thank you to both Katy and Brian. 😀

[adlockhungry]

Great interview! Please have Katherine Freeze on again!

[KG-vnou]

Maybe we just don’t understand gravity at large distances!

[ForTheShieldz]

Thanks for posting another great video. Bg explains everything so well. I find your channel very interesting and inspiring ❤

[raystaar]

From the gate, I've resisted the notion of both simulations and multiple universes, but the more I learn about dark energy and dark matter, the less resistant I become.

[troymosher]

I love these shows. It's good work. Brian, I'm sure you have little time for reading comments but I wanted to say, I appreciate your efforts. You are an excellent educator.

[Richard.Holmquist]

The ability of humans to devise experiments that dissect the thin red line into what actually is from what we want to be, but is not, is one of the marvels of our specie. It’s good for young students to see this process up close and personal, as in the dialogue of this video, so they know it is possible and don’t get discouraged. Thanks.

[ozlemcosar]

Is this a repeat? I am sure I have watched this episode before. Can you put the date of the recording somewhere?

[jesselanganki]

I'm not sure if I've seen an explanation for this concept before, but is it possible that Dark Matter is simply "peaks and valleys" in spacetime caused by spacetime being twisted circularly by the black hole at the center? Could matter just be getting stuck in a "valley" in the spacetime that's causing it to "roll" in an orbit instead of being flung outward? Maybe there are a bunch of observations that rule something like this out, but I haven't really seen anyone discuss it yet.

[jordanreynolds]

Maybe dark matter is the friends we made along the way

[TheVamp-Lestat]

Dude. Im a regular guy that enjoys this kind of thing. Im glad I was around before and after Youtube really took off. World Science Festival, this is immense shit your doing. I can only imagine the next generation of kids that grow up with this at their fingertips. Inspiring stuff.

[markoszouganelis]

Thank you World Science Festival💚🦋🌸🎶☀🌈

[TelegobageProd]

The high quality of the guests makes all these interviews truly unique. Thank you for working hard to post more often than before.

[shodan]

However, if every galaxy is within a filament, what is called a Birkeland Current, which is a self-organizing Electromagnetic field capable of transmitting a flow of ions, electrons and neutrons. Because these filaments rotate, they contribute to the rotational velocity of the galaxy within. Easy peasy.

[donaldaxel]

I love that Brian Greene explains how odd it is that people think of "dark matter" and explains why there are indications that there is this "dark matter". But I miss the critical question about exactly where does the calculations begin to be projections instead of "proof".

Fx. if you crash two neutrons against each other and get something else, you could argue that it is what you would expect, but then NB neutrons are not billardballs, but some other kind of processes, - not static! so every "newtonian" parabel on quantum particles is bound to be "strange", and perhaps they are more wrong than right. Truth is never absolute in these questions. Allow me to be sceptical about the human understanding of gravity and dark matter.
❤

[OrangeDot-fj]

Thanks again to Prof. Freese for more insight on her 5 objects found by John Ma and John Gardener.



The talk of bubble observations is important as our research group has observed also how bubbles can be associated with black hole removal from the Milky Way Galaxy as an energetic way they are not allowed to interfere with the supermassive as smaller individual black holes.




Prof. Freese, it is a very long way from Austin to travel for a talk with Prof. Greene.





Thanks for your research on how axions may power dark stars. There are cosmology realities when only fusion exists before the elements started clumping, and it is good you finally got time with the JWST to look back upon the 5 objects, or the three.





Thanks again to the WSU staff for another incredible show. Prof. Freese spent time in Nordik Institute areas, so does she know their challenge of 10x greater North radiation than we have in the non- polar regions?




When do we have our radiation shielding in place that protects our moonbase Astronauts? They are too vulnerable.




CLG

[PedroHenriquePS]

6:40 but i have a question, if time itself is variable and we know it is, wouldn't the speed difference of time alter what we perceive as velocity looking from the outside?

This would also explain a lot of event horizons... and make the entire dark matter concept wrong, right?