In this week in 1996, the IBM super computer Deep Blue beat world chess champion Gary Kasparov. At some points of the game, Deep Blue was searching 100 million chess positions a second. "The depths of this computer's calculation gives it positional strength," Kasparov said.

February 2 is Groundhog Day, and if you only listen to one radio show about déjà vu this week, this is the one. Even if you’ve already heard it... especially if you’ve already heard it.

Rumors abound that Facebook will take first steps to going public this week. The company's estimated worth? One hundred billion dollars. It got us thinking about other mind bogglers.