R.I.P. - Martin Gardner
If you don't know the name Martin Gardner, you likely have not been involved in the skeptical/science-based community for very long. His is a giant profile and one that, sadly now, will be very missed. Martin Gardner died on Saturday, May 22 at the age of 95.
Go here and read. Then go do some math puzzles or just learn something new. You know, for Martin. It'd make him smile.