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2020-02-03: Are there Infinite Versions of You?

  • 10:31: ... universe to greater and greater precision and see if it has an open or closed geometry... but even then we still have to hope that it’s reasonable to extrapolate ...

2016-04-20: Why the Universe Needs Dark Energy

  • 03:43: And we call that a "closed geometry." If k is minus 1, the universe is the 3D version of a negatively curved hyperbolic plane.
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