In six Level 1 videos we review General Relativity from the substratum viewpoint.

Here in part 2 of 6: We move on from 2d space to 3d space and 4d spacetime. In the Schwarzschild spacetime, we find that space contracts in the radial direction, and time slows down near a black hole. For a shell, we see that the flat spacetime inside the hole differs from flat spacetime far away.