Big Bang & Big Crunch
The universe was created in a Big Bang 13.7 billion years ago, is still expanding today, and billions of years from now it might recollapse by its own gravity with a Big Crunch (or continue expanding forever, Big Chill). Moslems say that this is what Allah says. The Quran says that on the first day of creation, God made the heavens and the Earth meshed together, tight and compact (Big Bang), continues to expand it into the universe we know today and at the last day God will recompress it into its original state (Big Crunch). The Quran says that on the first day of creation, God made the heavens and the Earth meshed together, tight and compact (Big Bang), continues to expand it into the universe we know today and at the last day God will recompress it into its original state (Big Crunch). About the first day (Big Bang), Allah says:
[Quran 21.30] Do not those who disbelieve see that the heavens and the Earth were meshed together then We ripped them apart? And then We made of water everything living? Would they still not believe?
In the Quran God also promises to make the Big Crunch:
[Quran 21.104] On the day when We will fold the heaven, like the folder compacts the books, and as We originated the first creation We shall return it; a promise (binding on Us); surely We will deliver.
There are three possibilities to how the universe could end: Big Crunch (Quran), Big Chill and the Big Rip. NASA recently ruled out the third scenario (No Big Rip; see also: Universe Today). This leaves the universe with only two possible endings: Big Chill or Big Crunch, depending on what this Dark Energy turns out to be. Learn more: Expansion of Universe in Quran.