https://www.pbslearningmedia.org/resource/d507d211-b280-48ef-8777-e18ec7350bf9/d507d211-b280-48ef-8777-e18ec7350bf9/
Hear how a few stone tools and two front teeth, found decades ago, were recently dated by paleoanthropologist Rick Potts and his colleagues. Potts says this...
early human migrationrick pottskey dateidentifiespbs