Drake equation
The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. The equation was written in 1961 by Frank D...
Drake equation - Wikipedia
Astronomers Have Started Search For Alien Nuclear Wars
Testimony from several people who saw, firsthand, the flash from the first successful detonation of the atomic bomb, at the infamous Trinity Test, on July 16, 1945 indicates the flash was a “golden, p...
Carl Sagan Explains the Drake Equation
Famous American astronomer and astrophysicist Carl Sagan explains the Drake equation.The Drake equation (rarely also called the Green Bank equation or the Sagan equation) is a famous result in the spe...