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#137 – Alex Filippenko: Supernovae, Dark Energy, Aliens & the Expanding Universe
Lex Fridman Podcast
What Happened Before T Equals Zero?
Roger Penrose: The idea of what happened before t equals zero and whether there are other universes out there is on the boundaries of science. He says we have real testable physics that we can use to draw certain conclusions based on what we know. Penrose: It's hard to prove uniqueness, it's hard to completely convince oneself that a certain hypothesis must be true.
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