General Relativity part 6: Space expands

In six Level 1 videos we visualize General Relativity with a substratum (“fabric”) that uses the same math as GR, the math of curved surfaces.

Here in part 6 of 6: Space expands in the Big Bang and inflation. Two horizons limit our visible universe to a small part of the whole. There may even be a multiverse. Gravitational waves are a cyclic expansion-contraction of space.

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