Giant pandas are notoriously fussy eaters. They only munch on bamboo and each day spend 15 hours eating up to 99 pounds (45 kilograms) of the stuff. But their ancestors, like most bears, ate a much ...

Add Yahoo as a preferred source to see more of our stories on Google. Quote box: "The hooked false thumb offers a tighter grasp of the bamboo and, at the same time, its less-protruded tip - because of ...