Sir Isaac Newton's famous apple tree is about to leave gravity behind!
Flying aboard space shuttle Atlantis today will be a 4-inch sliver of the tree from which an apple fell nearly 350 years ago and inspired Newton to discover the law of gravity.
Read the full AP story by Marcia Dunn and see a photograph of Piers Sellers, the astronaut responsible for this initiative: www.msnbc.msn.com/id/37026273