Puzzle fans and '80s fanatics, listen up. On Sunday the San Francisco Open 2009 Rubik's Cube Competition goes down at the Exploratorium. The competition is open to competitors of all skill levels, and anyone who knows how to solve a cube (i..e, match up all the pretty colors) is encouraged to attend, compete. But even if you can't solve the famed puzzle, you should still stop by and watch as competitors try breaking world records. more ›