Here it is, in a nutshell: The logic of science boiled down to one, essential idea. It comes from Richard Feynman, one of the great scientists of the 20th century, who wrote it on the blackboard during a class at Cornell in 1964.
Aly Raisman started gymnastics like millions of other children â€” in a toddler tumbling class. Now 17, the Massachusetts athlete is considered one of the best tumblers in the world. And she's on track to make the 2012 U.S. Olympic gymnastics team.