Revelation 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.

Not that I actually believe that - I'm with the heat death theory here.

It seems I need to justify this WU a little more. Until relatively recently, there was very little understanding of physical constraints such as entropy. The question of the end of the universe was a theological one, and opinion was divided (sometimes even within the same religion) as to where the world was going. Hinduism has maintained that the present world will end, but that an endless cycle of worlds will succeed it. The Jewish view has been split between eternal permanence and a final day with a general resurrection. This was a point of contention in Jesus' day, with the Sadducees taking the former view and the Pharisees the latter. Christianity has mostly jumped with the Pharisees, and Revelation reinforces this.