He would have been 75. Celebrate by watching his last interview, in which he talks about pseudoscience, scientific illiteracy, and his book The Demon-haunted World: Science as a Candle in the Dark.
Rebecca leads a team of skeptical female activists at Skepchick.org. She travels around the world delivering entertaining talks on science, atheism, feminism, and skepticism. There is currently an asteroid orbiting the sun with her name on it. You can follow her every fascinating move on Twitter or on Google+.