What I appreciate about E.H. interviews is that John gives time to the guest to speak about the subject in which they specialize and never attempts to interrupt or monopolize time.

Could there be a mirror universe? Hmm… something to reflect on.

I love how JMG does not interrupt him once. Keep doing what you like!!

Anna's voice is so pleasant to listen to. It's basically audible caramel.

Thanks for the conversation John, it was great fun.

Great topic. Looking forward to part 2 with Dr. David Curtin.

“Today a young man on acid realized that all matter is merely energy condensed to a slow vibration, that we are all one consciousness experiencing itself subjectively, there is no such thing as death, life is only a dream, and we are the imagination of ourselves. Here's Tom with the Weather.” - Bill Hicks

This channel is, by far, the most pleasing way to learn new scientific perspectives on reality. My unending thanks to you and your excellent guests.

Woo. Just in time for a car trip.

Nice timing. I'm about to hit the sack, and this is a relaxing way to wind down.

The best content around by a country par sec

Whoa... never thought of that, but yeah: The question "Why is gravity so _weak_ ?" can be rephrased as "Why is matter so _light_ ?" 🤯

If there is, I guess _evil JMG_ is clean shaven?

If dark matter can form objects like dark matter stars, dark chemistry, interact with dark photons, etc., shouldn't this show up in gravitational waves? Maybe dark matter black holes are just the same a regular black holes, as they're all just gravity. But what about merging dark matter neutron stars? If two dark neutron stars merge, you should be able to see a signal for that via gravitational waves, but there would be no corresponding light signal. The only way we could observe it would be through gravitational interactions. To me, that seems like the easiest way to test this idea. Are there a large number of gravitational waves that carry signatures of events we should be able to see, like neutron star mergers, but then don't have any corresponding visual event? Your gravitational wave detector goes off, and everyone points their telescopes to observe the event. Then....they see nothing. Has this kind of work been done? Or do we have examples of phenomena that we have gravitational wave observations for, events that should produce a light signal, but none is ever found?

How did this transition from "dark matter is known not to collide" to atoms, planets and stars of dark matter?

Prof. Curtin, with brilliance, provides an incredible flow of information for the discussion.

If there are dark stars, shouldn’t at least sometimes normal and dark stars end up in orbit around each other? Shouldn’t we than see stars wobbling or really orbitting things that we don’t see? We don’t really know how big those dark stars are but we might want to have a good look at our planet survey data. And I would imagine that in most if not all theories that should look similar but distinguishable from “normal” stuff we would expect to see.

alright, alright, alright

Thank you for this awesome content.

I’ve peered into this mirror universe…yup, still fat and bald.

I like how the guest says "yeah?" lol

That was a truly mind-blowing episode, I am listening this for 4-5 times already while going to sleep and it is so advanced science that it is truely amazing. Absolutely fascinating. Awesome guest, I would love to hear him again! Thank you for the awesome content!

Dr. Curtin talks about subject in a very clear way. Thank you for making this vid.

I so hope David comes back for a fermi paradox video. I know Fermi was just spitballing at lunch with his work palls when it all launched, but so fascinating how it got legs and ran. I send a little of what I glean from these things to two young bucks I work with with less education than me, one appreciates what I say, the other I can’t read so well yet.

Fantastic interview, John. Although I couldn't help singing 'no dark atoms in the classroom...hey, teacher, leave those kids alone!' lol

This is actually a really great idea. Instead of looking for large scale interactions there might just be an already existing needle that we can look for in the proverbial haystacks of existing data sets. The PERFECT task to unleash AI onto.

That was amazing. They should never apologise for going too deep. You do such a good job interviewing them john

Can we name all the dark particles after cheese snacks? Goldfish, Cheez-Its, Doritos, Cheese Poofs, Cheetos, etc.

Great guest! Thanks Pr. Curtin!

You know, since there's so much more dark matter than regular matter, then shouldn't we start calling it just matter and the stuff we're made of is the exotic matter 🤔

It was nice to see so many updates appear in the podcast app but it stopped a while back. I'm still happy to have these on youtube though.

A beautiful podcast! Thank you!

Great video and information !

Thursday is here and so is the EH! Thanks John

As long as Mirror Spok is in the mirror universe, I'm happy! Thanks for the episode!

Fantastic conversation. 👍👍

When talks about "tiny tiny" interactions ... I recommended he use the phrase "teeny weeny." That's my contribution to science :)

Yaay just hit play cant wait to listen Love how John always gives the interviewer the time they deserve to tell their stories . just watched first 2 episodes Dark Matter and then open YT to this I'm so excited , thank you Event Horizon team for all the great work you do to bring these to us . P.S .....Dark Matter kinda scares me

Every Godier vid deserves 100 million likes

This is why I like NdT's idea to call Dark Matter ans Dark Energy "Fred and Wilma" because we have no idea whether they are related, or whther dark matter is a single particle or many, or whether it is even is a particle. I think I will live to find out the answer, but ive already been waiting a long time...

Dr. Curtin is very good at explaining this. I hope he becomes a regular guest. Having said that, this seems so wildly speculative that I can't help but think this is just too bizarre. One thing that immediately comes to mind is black holes. If this "Mirror Matter" exists, it would form black holes, and those would merge with normal black holes. So we should expect MORE, or larger black holes, than is predicted to form the SM. This would seem to be an obvious observational opportunity, if this is true.

Very thought provoking.

Fascinating! If these predictions are verified, this will be huge! Hope to hear more about this research and also a Fermi paradox discussion with this guest would be great. Awesome interview!

This is my nightly routine, I love this channel ❤

Mention around 8:19 of the 80% "one boring thing" is likely the same division, when considering the cultural development of humanity, and the role of genetics. Expressed directly as "intelligence", within the complex model that determines human behavior. The boring part instantly becomes less boring, when one considers the fact that "The void does not move."

Perhaps nothing actually changed. There wasn't more matter then antimatter, rather when the process of collision was finished, two universes were produced. One of Matter, and one of Antimatter. The construct of the universe is the even numbers, so the symmetry should be perfect.

Interesting discussion on hypotheticals.

Almost 300k subscribers ❤

40:00 Lol...I was kinda hoping your guest would get into the whole Kinetic Mixing thing... [Ten Seconds Later]... Alright!! 🙂

man, i love these dark matter in depths. thanks once again JMG and ANNA and im not sure what the opossum does - probably supplies and taste-tests the snacks. i have been thinking about the possible physics interactions of dark matter particle types while at the same time causing it to be a giant puff ball around galaxies such that it is.

Great episode with a great speaker. I always love when you impress your guests with your questions. Yes, sometimes the "wacky" youtube hobbyists can hang with the professional theoreticians and this show proves it.

Many thanks to you and Dr Curtin. So, 80% of the effects of gravity needs to be explained and the theory of dark matter provides a possible candidate. The anomalous cosmological observations are involved with gravitational lensing, and with the awkward fact that spinning galaxies don't fly apart. The initial dark matter model to cover these observations, based partly in Super Symmetry, would give us WIMPS in a non-collapsed, non-interacting, spherical cloud of dark matter around a galaxy. However a later theory holds that the observations could be just as well explained by a model in which another 25% (say) of the 80% is not WIMPS and does collapse into a galactic disks containing the dark analogues of the observable universe (in which we liiiive). I very much like these ideas from an SF point of view but it seems to me that the cosmologists and particle physicists supporting dark matter and dark energy have too many angels dancing on the head of a pin and William of Occam might have something to say about it.

Here's a thought, what if DM is attracted to "normal matter" but repels itself?

Imagine a beautiful Higgs field filled with placid Kaons as they Muon to one another. 🐄🐄🐄

Thanks John 🙃

This guest sounds just like Elon Musk - great interview - thanks!

How am I supposed to fall asleep to 30 minute episodes 😩

The thought that there is an entire universe teeming with galactic civilizations just beyond the reach of our abilities to sense is nearly intolerable. Makes me feel kinda funny.

Holy acid trip! This scientist is answering questions I’ve been asking myself for years. I’m only half way through, and I’m surprised the MACHO wasn’t addressed yet. But what if neutrinos are to baryonic matter as dark matter is to baryonic matter. In that case it is, “turtles all the way down.” Just bigger and smaller turtles. This right here is opioids for my curiosity seriously.

What am I missing? I thought the dark matter halo is spherical and puffy because it does not self interact. Dark matter only interacts through gravity and collisions are rare. If dark matter can interact with it's self and emit dark photons condensing into denser matter then it seems like we loose the one of the main properties of dark matter that we use to explain observations. Mainly the galactic halo structure that has been observed in gravitational lensing and is vital for explaining the rotation curve of galaxies. So, if it self interacts and can collide what makes it not collapse?

My mirror universe double has a goatee.

can there be dark matter life?

Damn, this guy can explain stuff

Maybe some conscious being that inhabits the dark matter universe is wondering what that 20% of pesky stuff is that they can’t detect.

JMGoat

Lets go! 😎

When it comes to voids in the universe and concentration of mass to wall and chains... it probably is thanks to some space-time whirling during big bang. Like in a streaming river. There is not mass center, just a whirl that pushes everything out of the center - and once it loses energy of the rotation - there is empty space left.

Somewhere out there is a dark possum who loves you John. Ponder that one.

I know we always say dark matter and dark energy are different things and we shouldn't confuse the two, but could dark energy be coming from interactions in the "dark matter" part of the universe? Einstein's cosmological constant is the leading candidate for dark energy (although I don't know if it explains the various increases in expansion that have happened) but that's just a number... what exactly is it? Could it be something that's happening in the part of the universe that we can't see? Maybe pressure from dark matter vs dark anti-matter collisions?

JOHN JOHN JOHN!

I wonder if dark matter beings can see our ' regular ' stars and such

Something that has puzzled me for a while - I've heard the speculation about DM being a spherical 'shape' which forces galactic disks to rotate 'wrong' - the velocity curve problem. But for DM to do that it has to affect matter using gravity - anything else & we'd detect it by THOSE effects. Unless they want to invent a whole new magical force I guess - not the 1st time they've done that... But how can DM gravitationally affect normal matter without affecting itself? How can you have a 'dimple' in spacetime that only works for matter but not for the thing making the dimple? It's like we've got something very basic wrong & now we are WAAAAY down a non-functional rabbit hole making shit up to try to explain why our hypotheses fail utterly to fit observations. The universe cannot possibly be this smooth & flat - "Oh there was this magic that stretched it just enough to fit our theory then it went away." Galaxies don't work right - "Oh, there's this magic particle that only interacts just enough (& in no other way) to make our theory work." Then we have the Hubble Constant problem, frantically looking around for something to erase the contradiction & ignoring that their own theory of Dark Energy postulates precisely a change in the rate of expansion. 5 bn years back, IIRC we had a change in the expansion rate & now they're babbling about it slowing down. Can they even SPELL 'constant' while they postulate alterations in that exact figure? Somebody needs to go back to Maxwell's quaternions & start over, ignoring Heaviside & Hertz's corruption of the theory & see where we then arrive. With computers we could have an entire new physics in a decade.

If only my mind could understand and follow this conversation...

I’m going to eat the cheapest can of beans and bread until I have budgeted both patron subs into my life.

Off-topic, but I've thought listening to your interviews a number of times that if you don't already know it, you might like 'Blame!'. There's a Netflix movie and a manga, but it's essentially about a solar system-wide Winchester mystery house-style pointless ecumenopolis built by AI machines humanity lost control of a few thousand years before the story begins. Nihei wields scale extremely well, the main character comes to a gargantuan empty space he's told is the diameter of Jupiter, earlier he says he came from "3,000 layers below", and the view from the top of a layer is shown to basically be a passenger airliner's cruising altitude. Check it out if that sounds in your wheelhouse!

In the movie/tvseries Lexx, there were two universes: light and dark, invisible to each other. Dark is were all the evil stuff is, and Earth happens to be in the dark universe.

I have a mirror cube called a Reflectron. It's really hard to solve!

A parallel world? Like .. the upside down?

Dr. Curtin's voice, accent and his speech patterns sound amazingly similar to Elon Musk's. His bio places him in Canada and he went to school in Australia but somehow he seems to have a bit of a South African accent.

This is nearly as if the universe in itself contains its nonexistence, as if it had planned on the physical level the possibility of it not being and which would be translated as a physical model with particles and periodic tables. It’s a sort of back up or guarantee that if there’s nothing and someone might ask why is there nothing and not something or if there’s something and someone asks why is there something and not nothing, then the universe would have an answer for both situations or scenarios.

I thought QCD axions were more likely now than WIMPS considering the wave like scattering we’ve been detecting with gravitational lensing in the last 2 years?

What if dark matter axions are puffy because they're touching and are as close to each other as weakly interacting massive particle degeneracy pressure will allow them to be? What if thier atomic diameter is light years?

What if Sophons are messing up our physics lol

He's also got a good sleepy headphones in bed sort of voice 👍

Bark star: Serious. Duck photons are made of quacks.

Appreciate your presentation. Think of where earth is in all this . How we are told this is the unique spot where the only life exists. Bologna. The moon trips you can’t see the stars because the sun is so bright. Now they need to send a experimental ship to see the effects of the Van Allen radiation belt ...

Lets use our imagination. Gravity might not be a real force, rather its a space warping or wrinkle in spacetime. So... We always assume that spacetime is really flat unless there's matter around to warp spacetime. Could that assumption be wrong?

11:59 Take a drink

What if there’s so much Dark Matter because there’s more than one type of Dark Matter. 6/7 universes overlapping and only interacting with eachother via Gravity.

What would E = MC2 look like in this dark space? And is there a different “speed of light” equivalent that is different than our electromagnetic view on this “side”?

See Jean-Pierre Petit's Janus model.

The one question would be when will we know what DM is? Decades or hundreds of years?

So we are talking about subspace... 😉 (Star Trek terminologi). 😅

Ever heard of model janus by jean pierre petit?

Too deep? I say go deeper. Deeeepeerrr.

So would the reason for the "Dark Universe" to be heavier than our own universe is that the dark particles could be intrinsically heavier? That's my only question. Edit: nm. He answered the question with baryogenesis.

I wonder if black holes are converting light energy/matter into dark energy/matter in some process...they have been feeding for 13 billion years so if you play the record backwards shouldnt everything that has entered a blackhole and everything around the blackhole spread out?

It's weird that dark matter is so difficult to detect yet we use it for gravitational lensing. It seems like those two things are contradictory. I know they're not I'm just ignorant of the explanation. But still... how

Why should there be two copies of the Standard Model? Would the 'dark' version necessarily have three generations of particles, for instance?

Wicked