A Two Million Year Old Fossil Has Totally Overturned What We Know About Our Human Ancestors

Richard Curtis uncovers a bone fragment at an archeological site in South Africa. He thinks it’s probably nothing more exciting than the remains of a baboon. Two colleagues, Jesse Martin and Angeline Leece, examine the fragment and 150 others from the site and attempt a reconstruction. And what they ultimately finish up with transforms our understanding of human evolution.