Dr. Frank Drake, the founder of SETI (Search for Extraterrestrial Intelligence), poses for a portrait at his home in Aptos, California. Dr. Drake also created the Arecibo Message - a simple binary encoded message broadcast into space by the Arecibo radio telescope in Puerto Rico in 1974. The message encodes several things: the numbers 1 to 10, the basic chemistry of life on Earth, the double helix structure of DNA, Earth's population, a graphic of the Solar System, a human figure, and a graphic of the Arecibo radio telescope and it's dish' dimensions. Read here.