4 ms·
Watching his Gresham talk (link in someone else's post) he represents the multiple cycles of the universe as cylinders connected at the round ends with time goi
by dave333 4y ago
Watching his Gresham talk (link in someone else's post) he represents the multiple cycles of the universe as cylinders connected at the round ends with time going along the central axis. He also represents the Big Bang universe as an upsidedown bell shape starting from a tiny radius, undergoing inflation and then later accelerating expansion shown by the outward flare of the bell. Not quite sure how he gets from multiple consecutive bell shapes to the cylinder representation. Seems like it should be more like a string of sausages with a big crunch before the next big bang.
- dave333 4y agoOn second listening, he stretches the base of the bell (the big bang phase) out and compresses the flare of the bell down using some mathematical transforms and makes the argument that mass is irrelevant at both ends. In the far future it is mostly massless photons and in the big bang things are so hot and fast that all the energy is kinetic and rest mass can be ignored. I still don't understand how the next cycle big bang originates.