Today is Carl Sagan day. He was born on November 9, 1934 and died in December 1996. He was an astronomer and a well know popularizer and communicator of science. He published more than 600 papers and authored or co-authored 20 books. The movie Contact from 1997, one of my favourites, is based on his novel. Sagan also was a promoter of scientific skepticism and he was a co-founder of the Committee for Skeptical Inquiry.
Reposted from Pharyngula