Janna Levin

And the temperature is going to only tell you about the mass, which you could tell from outside the black hole anyway. You know the mass of the black hole from the outside. So it's not telling you anything about the black hole. It's got no information about the black hole. Now you have a real problem.

And the temperature is going to only tell you about the mass, which you could tell from outside the black hole anyway. You know the mass of the black hole from the outside. So it's not telling you anything about the black hole. It's got no information about the black hole. Now you have a real problem.

And the temperature is going to only tell you about the mass, which you could tell from outside the black hole anyway. You know the mass of the black hole from the outside. So it's not telling you anything about the black hole. It's got no information about the black hole. Now you have a real problem.

And when he first said it, a lot of people describe that not everyone understood how really naughty he was being. He did. But some people who love quantum mechanics were really annoyed. People like Lenny Susskind, Gerard Zuft, Nobel Prize winner, they were mad because it suggested something was fundamentally wrong with quantum mechanics, if it was right.

And when he first said it, a lot of people describe that not everyone understood how really naughty he was being. He did. But some people who love quantum mechanics were really annoyed. People like Lenny Susskind, Gerard Zuft, Nobel Prize winner, they were mad because it suggested something was fundamentally wrong with quantum mechanics, if it was right.

And when he first said it, a lot of people describe that not everyone understood how really naughty he was being. He did. But some people who love quantum mechanics were really annoyed. People like Lenny Susskind, Gerard Zuft, Nobel Prize winner, they were mad because it suggested something was fundamentally wrong with quantum mechanics, if it was right.

And the reason why it says there's something fundamentally wrong with quantum mechanics is because quantum mechanics does not allow this. It does not allow quantum information to simply evaporate away and poof out of the universe and cease to exist. It's a violation of something called unitarity, but really the idea is it's the loss of quantum information that's intolerable.

And the reason why it says there's something fundamentally wrong with quantum mechanics is because quantum mechanics does not allow this. It does not allow quantum information to simply evaporate away and poof out of the universe and cease to exist. It's a violation of something called unitarity, but really the idea is it's the loss of quantum information that's intolerable.

And the reason why it says there's something fundamentally wrong with quantum mechanics is because quantum mechanics does not allow this. It does not allow quantum information to simply evaporate away and poof out of the universe and cease to exist. It's a violation of something called unitarity, but really the idea is it's the loss of quantum information that's intolerable.

Quantum mechanics was built to preserve information. It's one of the sacred principles. As sacred as conservation of energy, in this example, more sacred, because you can violate conservation of energy with Heisenberg's uncertainty principle a little tiny bit, but so sacred that

Quantum mechanics was built to preserve information. It's one of the sacred principles. As sacred as conservation of energy, in this example, more sacred, because you can violate conservation of energy with Heisenberg's uncertainty principle a little tiny bit, but so sacred that

Quantum mechanics was built to preserve information. It's one of the sacred principles. As sacred as conservation of energy, in this example, more sacred, because you can violate conservation of energy with Heisenberg's uncertainty principle a little tiny bit, but so sacred that

it created what became coined as the Black Hole Wars, where people were saying, look, general relativity's wrong, something's wrong with our thinking about the event horizon, or quantum mechanics isn't what we think it is, but the two are not getting along anymore.

it created what became coined as the Black Hole Wars, where people were saying, look, general relativity's wrong, something's wrong with our thinking about the event horizon, or quantum mechanics isn't what we think it is, but the two are not getting along anymore.

it created what became coined as the Black Hole Wars, where people were saying, look, general relativity's wrong, something's wrong with our thinking about the event horizon, or quantum mechanics isn't what we think it is, but the two are not getting along anymore.

And just to tell you how dramatic it is, so the temperature goes down with the mass of the black hole, heavier a black hole, the cooler it is, so we don't see black holes evaporate, they're way too big. But as they get smaller and smaller, they get hotter and hotter.

And just to tell you how dramatic it is, so the temperature goes down with the mass of the black hole, heavier a black hole, the cooler it is, so we don't see black holes evaporate, they're way too big. But as they get smaller and smaller, they get hotter and hotter.

And just to tell you how dramatic it is, so the temperature goes down with the mass of the black hole, heavier a black hole, the cooler it is, so we don't see black holes evaporate, they're way too big. But as they get smaller and smaller, they get hotter and hotter.

So as the black hole nears the end of this cycle of evaporating away, it takes a very long time, much longer than the age of the universe, it will be as though the curtain, the event horizon, is yanked up. Like it'll literally explode away. Just boom. And the event horizon, in principle, would be yanked up. Everything's gone.

So as the black hole nears the end of this cycle of evaporating away, it takes a very long time, much longer than the age of the universe, it will be as though the curtain, the event horizon, is yanked up. Like it'll literally explode away. Just boom. And the event horizon, in principle, would be yanked up. Everything's gone.