A few things… If Bob reconstructs Alice, is she really Alice if all parts of her have been deconstructed and then put back together? Also, what Bob puts back together is Alice from the time she reached the event horizon so this reconstructed Alice would know what happened after crossing the event horizon. Lastly, Alice? Who the f**k is Alice

As you can imagine dogs with their two types of color receptors began developing theories of electromagnetism long before us.

Digital Ghosts in a Dead Universe" would make a great metal album name

Doesn't the black hole evaporate before Alice reaches the event horizon?

Any comedy fans here wonder if Alice can eat the box?

The analogy is only as weak as the interpretation of Acoustics. kzfaq.info/get/bejne/f6t0hqSZys6cf6c.html What is failing to be properly conceived is that "Many Worlds" if true only REALLY exists as Harmonics on a Spectrum of probabilities for a given event. "Event" in this context means ANY phenom, whether Force, Mass, or Energy carrying Particle. Orange is the new Black. 😉

Y'all mot slick. The serpent was cursed to slither on its belly. It had legs...

I wonder what one would find if they went fishing in a black hole...

Sooo.. is AI is the next evolution?

I appreciate the love angle added to the story 😂

A Geodesic is best described simply as: a STRAIGHT line, on a CURVED surface.

this was such a great video

Is that guy in the suit with all the hair who keeps popping up supposed to be Heisenberg?

It is interesting that humans like to pretend to know what happens in a black hole 😊

Considering that we only have the US government (who are proven to have repeatedly lied about everything else)'s word for it that they managed to put men on the moon, something no one else ever claimed to have achieved, do we really believe that that actually happened?

Just wanted to say my shirt came and I love that its a gildan. 🎉

I love when matt says things like “although the derivation would be a bit much for this episode”, like, oh yeah this is fine but *that* would _too_ much 😵‍💫

"uploads his mind so he can outlive the black hole." That's the main thing that bothers me about the idea of "uploading the brain to another medium". It's a copy. Not a move. There's no real continuity between the two thinking entities. The person doing the uploading does not necessarily have a prolonged life even if the copy does. It's one of my biggest sci fi pet peeves. Along with Star Trek's glorified suicide booths.

I'm glad you mentioned Planck relics at the end. I was wondering, what would it be like if a singularity had a Schwarzschuld radius of the Planck length? Would this even be causally connected with the surrounding universe? And would this be undetectable except through gravitational effects? I'm not a physicist, so these are genuine questions. I would imagine this would behave like a very weak interacting particle since much information would be hidden beyond the tiny quantum scale event horizon.

space faring? 50 years and barely out of Solar system, 30 yes and no manned landing on Moon, Mars is too expensive

Regarding your next video: The behavior of entanglement when one of the entangled particles crosses an event horizon... According to quantum mechanics, entanglement is a robust phenomenon that persists regardless of the distance between the entangled particles. However, introducing an event horizon complicates this by adding the effects of extreme spacetime curvature. Theoretically, entanglement should persist even if one of the qubits crosses the event horizon of a black hole. Yet, this leads to significant puzzles in reconciling with general relativity and the principles of quantum information. The notion that information might be lost in black holes (as something crosses the event horizon) clashes with the quantum mechanical principle of unitarity, which dictates that information in a closed system must be preserved. The concept of black hole complementarity and the holographic principle suggest a way around this. These principles posit that the information about the infalling matter (and qubit) is not lost but rather encoded on the surface (event horizon) of the black hole in a two-dimensional hologram. As the black hole evaporates via Hawking radiation, this information could theoretically be emitted, preserving unitarity. Now, considering the scenario where one observer (and their respective qubit) crosses the event horizon while the other remains outside, the state of the qubits might seem to be in a superposition from the perspective of an outside observer. However, for the infalling observer, the qubit's state might appear differently, potentially still entangled with its counterpart. This reflects the essence of black hole complementarity, where the experience and observation of events differ radically between observers inside and outside the horizon, without violating the laws of physics as understood in their respective frames. If one were to measure the state of the qubit outside the black hole, it might force a "collapse" of the wave function, determining the state in a specific way. For the infalling observer, however, the entanglement could theoretically remain unbroken until they too cross the event horizon. The idea that both perspectives are valid but non-communicable between observers reflects the non-locality inherent in entangled systems when influenced by gravitational extremes such as black holes. While the infalling qubit and observer might seem to "render on the skin of the horizon" from an outside view, preserving information holographically, the interior perspective might continue to observe entanglement until passing through the event horizon, raising profound questions about the locality and reality across different frames of reference in such extreme conditions.

Wait, could one answer to the Fermi Paradox just be... The Moon? In addition to protecting the Earth from asteroid impacts, could the moon be so foundational to gaining an understanding of physics that not having a moon-like satellite severely slows down the progress of space exploration for any species that might exist? Also, isn't it theorized that the moon creating tidal pools was important in the initial formation of life? With all the advantages the moon gives us, could the moon itself explain that we're actually just super early to the space exploration party?

What if the universe was a double slit experiment and the galaxies were the cluster formations made by the wave functions and black wholes were the slits since we are unable to understand what is inside and they have limitless possibilities which would hint at this being the slit? Mabey I’m just lost 😅 love these videos

The theory that Alice's fall will be perceived as free floating works only if the gravitational field is constant all the way from the event horizon to the singularity. Is there any proof that it's the case?

What if the universe was a double slit experiment since clumps of particles via galaxies are grouped together? Or is this what he is getting at?

Screw "all of us" The United States of America is going to have boots on the ground. Our tech, our money, our glory. Not everything needs to be shared.

This is form 4 years ago and Degrasse just said 2 weeks ago its not solvable so !

Mmmmmmmm pancakification 🤤

@ 8:00 or the water was placed there at the same time the moon was created.

(Dear Quantum Physicists🙏- kzfaq.info/get/bejne/iq5mh81nktHPdX0.html)

Perhaps continuing build some cloud cities and underground terraforming process on the Venus are not harder than terraforming Mars, why not to select some settlements on both of them? and then interstellar stations and trade systems are established.

6:55 …that looked a lot more painful than Bob expected it to be…

At 7:03, shouldn’t Bobs time be slowing relative to Alice? She’s in free fall so from her perspective bob is wizzing away from her. Graphic has her time slowing relative to bob

It crashed on the moon and fell over. It wasn't a "soft" landing. And there has been NO WATER found on the moon yet.

It’s interesting that the model of his black hole is almost identical to a fusion reactor. 🤔

this is consistent with calvinism

Gravity does not warp anything. This explanation of time is unnecessarily confusing. Here is a simple explanation. The speed of light is a constant. The speed of time is also a constant. Any questions?

This week's Veritasium on KZfaq is an excellent companion to his video! Coincidence? . . . I don't think so,.

Don't be silly. Black holes aren't holes, they're extremely dense spheres of mass. No magic, just an event horizon due to gravity.

As boring as the reality is, Occam’s razor rules this issue. It’s as simple as it can be. With the rules of physics as they are, the distances are too vast.

Realistically, using the moon is the best option in general regardless of water because lower gravity enables much more efficient space exploration.

All the talk of space exploration got me feeling so hopeful about humanity, then the line "that *particular* Cold War ended" brought me crashing back down.

Gedanken

Wild speculation: maybe the singularity in curved space when approached at nearly the speed of light is equivalent to the event horizon viewed at rest in flat space? I'd be interested in the result if we extend the thought experiment to imagine that alice sends out signals at regular intervals (from her perspective) containing nonrepeating data, such as successive prime numbers, including after she crosses the event horizon. When Bob eventually recovers her representation in the Hawking radiation, does he recover her signals only up to the point she crossed the event horizon, or also afterward until she reached the singularity?

It's Space Time!!!! Happiness in physics!

Ah, Alice and Bob - I know them from their cryptography adventures

its 42

So if antimatter is less attractive, then that could suggest that all if it flew to the outer rim of the universe. so everything on the inside is normal matter and the crust of the universe would have been anti. then looking at the boundary between matter and anti, at the edge of the universe, should we not see a distinct energy level where they meet? maybe something in the CMB.

If q-bits are able to be decoded from the hawking radiation of a black hole . And, you could theoretically reassemble a human from their q-bits. Would the human you reconstructed have memories from just before they crossed the event horizon or would they have memories of after they crossed it as well? Are the q-bits just the state or matter as it cossed the event horizon? Since to the outside whatever happens in a black hole is causally disconnected from the outside... just curious great video

This video could've would've should've been the one to break through the "artist's rendition" cartoonified limitations plaguing black hole physics videos for too long and preventing people from learning what really happens in our universe. There's no physics enlightenment to be had from watching this cartoon. Just use a real physics engine next time; we can handle it. From Bob's perspective, the deeper that Alice falls in, the more she gets stretched and smeared all around, in what looks like a circular region, at the event horizon, and the more stretched, smeared regions seem to be moving more quickly away from the non-stretched, non-smeared regions, wrapping around to the other side of the circular region in a very smooth and analog way, and in a magnified way seem to correspond to how off-center she was at the angle she fell in, from his perspective; if there were such a thing as Alice's one and only 'perfectly-centered particle' toward the singularity from Bob's perspective, that particle may not be stretched or smeared, but the rest of her 99.99999999...% of particles certainly would be. Redshift and blueshift, although quite subtle, are also visible on Alice's image from Bob's perspective, although mostly just redshift. I myself describe it poorly, of course, and my excuse is that I'm not a professional physicist or science communicator with the proper formulas and programs; what's their excuse? for continuing to use intelligence-demeaning cartoons? Methinks there, like, ain't one.