Just about everyone has heard about The Big Bang, the leading cosmological theory for how the universe began. However, chances are you haven't heard of these ten unusual-sounding theories:

1. Clashing branes
   
2. Evolving universes
   
3. Superfluid space-time
   
4. Goldilocks universe
   
5. Gravity reaches out
   
6. Cosmic ghost
   
7. It's a small universe
   
8. Fast light
   
9. Sterile neutrinos
   
10. In the Matrix

More details on each theory are available in the article...