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Did the Universe Have a Beginning?
It is no longer true in general relativity that just because we're here now and there's stuff in the universe and its moving around, that stuff was always here. There can be a moment in time when universe comes into existence. In general relativity, maybe the big bang was the beginning. But you generalativity might not be right. Generalativity doesn't include quanti mechanics. We need a quantum theory of gravity. Maybe there are extra dimensions of space. Perhaps there are multi dimensional brains moving in some string theory construction. Many people, including myself, by the way, have proposed scenarios where the big bang is the beginning of our local, observable region of the universe. So we don't