On: Did the Early Universe Have One Dimension?

[mkn]

That's exactly what we think the case was before the Big Bang, I think, since points are zero-dimensional.

It's truly weird to imagine the Universe exploding from a point into a line, then into a planar region, and then into a three-dimensional domain.

[Pyrodogg → mkn]

All while not exploding and expanding out into anything else.

[mcritz → Pyrodogg]

Or does it? How can you find evidence for a fourth spacial dimension? We could be living on a "bubble" of three-dimensional space as a fourth is filling in undetectable from us.