How many alien civilizations exist?

Are we alone? Calculate the number of alien civilizations using the Drake equation. Created by American astronomer Frank Drake the equation is used to calculate the number of detectable extraterrestrial civilizations that may exist in the Milky Way galaxy.

The BBC has a cool interactive chart that puts the equation to work. View it here.

Mars One

By 2023, the Mars One team hopes to have human settlements on the red planet. Of course there’s a catch – the chances of every coming back to earth are slim to none.