If the universe sprung into existence and then expanded exponentially, you get gravitational waves traveling through space-time. These would fill the universe, a pattern of echoes of the inflation itself.

It may be that we live in an endless universe, both in space and in time. And there've been Bangs in the past, and there will be Bangs in the future.

I'd be perfectly happy with a mathematically precise description of how time began. I see science and religion as being two completely different things. I don't see science as relevant to the question of whether or not there's a God.

Neil Turok Quotes