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The Wave Function of the Universe
In the 1960s, Stephen Hoking showed using pen roses techniques that the Big Bang is a singularity where Einstein's theory breaks down. He and Jim Hartle then came up with an explicit model of how you would go about giving a quantum description of the creation of the universe. And their trick was really to sort of in a way, bend the time dimension of Einstein's theory into a space dimension. If your reality is pure space dimensions, you can just round it off like a sphere.