On Tuesday, 21 August 2018 21:10:06 UTC-4, RichA wrote:
Anyone familiar with this? A 3 Brane is a 3 dimensional string (string theory) as a universe, surrounded by a 5th dimensional void. The idea is that our universe is a 3 Brane universe is supposedly a rectangle. So, if the universe began as a "Big Bang" and expanded spherically, how could a 3 Brane universe be a rectangle?
Secondarily, there is a theory that other universes could be similar 3 Branes, separated from ours by only a couple mm from ours yet we can't see them..