When black holes disappear, what happens to the stuff that fell in?

It turns out now that the general view is that black holes do not erase information

from the Universe. We now think you could collect all that radiation, and in principle,

put it into some quantum computer and reconstruct the information about everything that fell in.

But the implications of that, it's profoundly exciting because

it really does seem to be given as a glimpse of a deeper theory of gravity.

So one view, and I emphasize that there are other views where the cutting edge of research now,

but one view is a field which has become known as 'emergent spacetime' – that space and time

themselves emerge from what? From quantum entanglement, from some kind of smaller

parts or pieces. We don't know the nature of them but it does seem that there's a deeper underlying

theory from which space and time emerge. That is what we call the 'quantum theory of gravity.'