Have you ever heard of the Drake Equation? Its a mathematical formula proposed in 1962 by American astronomer, Frank Drake. Basically, Drake’s equation is used to estimate the number of extra terrestrial civilizations in the Milky Way galaxy. According to Frank Drake’s conservative calculations, there may be 10,000 civilizations in the Milky way alone. [...]

In 1990, after the Voyager 1 spacecraft was at the end of its primary mission, Carl Sagan lobbied NASA to turn the spacecraft around and take a photograph of earth from the distant edge of our solar system at approximately 3.7 billion miles away. The result was this picture showing earth as a fraction of [...]