Martin Gardner has died at the age of 95. He was a prolific writer in three different areas: mathematics, magic and debunking pseudoscience. Since those happen to be three of my favorite things in life you can imagine how big a fan I was of his writing. His book Puzzles From Other Worlds made a big impression on me when I stumbled onto a copy when I was about ten. It was a great thrill for me when Gardner volunteered to write a jacket endorsement for my book on the Monty Hall problem.
Obituaries are available all over the internet, but I think this profile, published in 1995 in Scientific American, will tell you what you need to know. Losing Gardner is like losing Isaac Asimov, Stephen Jay Gould or Carl Sagan. He will be sorely missed.