Zapping Food & The Baby Mammouth

  Researchers have found a new way to kill bacteria on your food. Rebecca Williams reports it involves zapping your lettuce with high voltage. And... scientists have discovered the best preserved baby mammoth ever found. Lester talks with paleontologist Dan Fisher about what we can learn from the mammoth. Fisher's work is chronicled in a new documentary called "Waking the Baby Mammoth" airing this Sunday on the National Geographic Channel.