Hr1: News Roundup, Bird Tracking, Homo Naledi, Undiscovered
May 12, 2017, 07:00 PM
The team of paleoanthropologists that discovered fossils of Homo naledi in a South African cave two years ago say the bones are between 335,000 and 236,000 years old. Plus, Science Friday has a new show! Undiscovered tells the back stories of great scientific discoveries.