Scientists examine underground clues from over 250,000 years ago that raise questions about our early relatives — and what it truly means to be human.

Nova and National Geographic present exclusive access to an astounding discovery of ancient fossil human ancestors.

Science Breakthroughs: Homo Naledi Discovered in 2013, new and puzzling finding of small-skulled fossils of Homo Naledi has scientists trying to understand whether Homo Sapiens lived at the same time as Homo Naledi, and how Homo Naledi communities may have lived.

National Geographic Scientist Uncovers Treasure Trove of Human Fossils That Could Challenge Rules of Human Evolution Tiny Humans Living as Recently as 1,500 Years Ago Could Rewrite the Timeline for Human Evolution.