This 2.2-Million-Year-Old Child Fossil Made A Lot Of Scientists Very, Very Upset

Scientists argued for decades about this little fossil, partly because of their own hang-ups about human origins. This suspenseful story is a great reminder of why it’s good to keep an open and inquiring mind.Don't miss the dirt at 6:45 on why scientists rejected new ideas, the description of one of the biggest scientific hoaxes ever at 8:31, and the crazy eureka moment about predators at 12:54.