The theory states that in billions of years a "bubble" made of an alternative universe will pop into existence after a quantum fluctuation, at a lower energy state than the rest of the universe. That bubble will then start to expand at the speed of light and eventually "sweep everything before it", enveloping the universe itself.
On the Bright side... They have also expressed the usual ("It wont happen for Millions of Years") responce, so everything is groovy here, you can stop clentching..
Edited by Professor T, 24 February 2013 - 09:26 AM.