Today marks the 77th birthday of the late scientist and author, Carl Sagan. A lot of us probably owe much of our understanding of space and astrophysics to this man. Thanks, Carl. Happy Birthday!
Leonard Nimoy turns 81 years old today. He introduced us to Spock, directed one of the best "Star Trek" films, and sang us the story of "The Hobbit." He's done so much, it's almost impossible to list every accomplishment here. He's even still going strong in the sci-fi world with a recurring role in "Fringe." Thanks for all you've given us sci-fi fans, Leonard. Happy Birthday!