A small change to the theory of gravity implies that our universe inherited its arrow of time from the black hole in which it was born. Our own Universe may be the interior of a black hole existing in another universe.

2019-01-02:

If complexity does underlie spatial volume in black holes, Susskind envisions consequences for our understanding of cosmology in general. “It’s not only black hole interiors that grow with time. The space of cosmology grows with time. I think it’s a very, very interesting question whether the cosmological growth of space is connected to the growth of some kind of complexity. And whether the cosmic clock, the evolution of the universe, is connected with the evolution of complexity. There, I don’t know the answer.”

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