World renowned physicist Sir Roger Penrose has evidence found in cosmic microwave background in which he believes can prove that our universe is just one of many in a series of cyclical Big Bangs, each spawning its own universe.
According to Penrose, each universe returns to a state of low entropy as it approaches its final days of expanding into eventual nothingness. Black holes, by virtue of the fact that they suck in everything they encounter, spend their cosmic lifetimes working to scrub entropy from the universe. And as the universe nears the end of its expansion the black holes themselves evaporate, setting things back into a state of order. Unable to expand any further the universe then collapses back in on itself as a highly ordered system, ready to trigger the next Big Bang.via popsci