Talk:Unity/@comment-187.101.6.118-20120519214615/@comment-4867780-20120520011418

That's called the "Big Crunch" theory. The Big Bang was the explosion that caused the expansion of the universe, and it says that after a cosmic while, the universe slow down, then stop expanding, and then flow back to it's pre-Big Bang state (Big Crunch). Then after another cosmic while, a new Big Bang happens, expansion, and so on. Just like a cosmic heart beat.