Summary
Highlights
Introduction to the San Bushmen00:00:00
Spencer Wells introduces the San Bushmen, a group whose ancestry represents the oldest branch of the human family tree, to understand the origins of human migration.
The Science of DNA and Markers00:02:55
Wells explains how DNA functions as a manual of life and how inherited mutations, or genetic markers, act as a 'time machine' that allows scientists to trace human ancestry through the Y chromosome.
Visualizing Genetic Descent00:04:26
Using local fruit to illustrate the concept, Wells demonstrates how unique genetic changes are passed down through generations, effectively acting as badges of descent that confirm the San people as one of the oldest tribes on Earth.
Language and Ancestral Innovation00:06:55
The video explores the unique 'click' language of the San people, which linguists believe may be ancestral to all human languages, and highlights the creative explosion of technology and ritual that occurred 50,000 years ago.