on all seriousnesses, according to the scientific community
The universe is all one big cycle, it EXPLODES from the "Big Bang" and then slams back into itself creating the "Big Crunch"
Space is curved, like a ball, and the universe is like a drop of water, the drop of water hits the ball, splits into multiple pieces, comes back to a center point, creates a drop again, and then falls onto another ball...
Unfortunately science leaves another gap for religion, so even though it may defeat it can open up for other religions to lay claim for things still unexplained. Basically, its always been, and always will be.
thats a brief explination, any questions?