Have you ever looked up at the night sky and just wondered, out of so many stars and planets and galaxies... is there life, even intelligent life out there? Are we truly alone. The Drake Equation, created in the 1960s by Frank Drake, is an equation developed to calculate how many detectable alien civilizations may be out there in the universe. There is an awesome interactive on the BBC Future website that allows you to calculate this number, based on different parameters that you set up. I definitely recommend checking it out: Drake equation: How many alien civilizations exist?