I am very sad to write that Martin Gardner, a skeptical giant and genius by any standard, died today in Tulsa Norman, Oklahoma. Wikipedia has a list of his remarkable achievements. He was a lifelong friend of James Randi, who has written a brief statement at the JREF page. I've heard Randi tell many a tale about him. His love for Martin was worn on his sleeve. [Update (23 May 2010): Richard Dawkin