The Six Thousand

According to cosmologist Max Tegmark, parallel universes are a direct implication of cosmological observations. He suggests that right now there a copy of you reading this Blog. The life of this person has been identical to yours in every respect. But perhaps he or she now decides to close this window without finishing it, while you read on. The idea of such an alter ego seems strange and implausible, but it is supported by astronomical observations. The simplest and most popular cosmological model today predicts that you have a twin in a galaxy about 10 to the 10^28 meters from here.

Read more: http://space.mit.edu/home/tegmark/index.html