Once Upon a Time, the Universe Was Really Weird : Discovery News
If they’re correct, the three dimensions of space and one dimension of time that make the four-dimensional spacetime we live in today isn’t how it’s always been — the Universe may have existed in a lower dimensional state in the past.
The thinking goes like this: Shortly after the Big Bang, the Universe possessed only one dimension of space and one dimension of time. It was basically a straight line. As the Universe began to cool, and expanded, this one dimension of space became “wrapped up” in such a way to create two dimensions of space and one of time — a plane, like a sheet of flat paper.
(Source: spytap)


