This video is called Human Prehistory 101 Part 3: Agriculture Rocks Our World.

From New Scientist:

Farming has deep roots in Chinese ice age

• 19:00 18 March 2013 by Colin Barras
• For similar stories, visit the Food and Drink Topic Guide

Some ideas need time to take root. A new analysis suggests it took up to 12,000 years for people in what is now China to go from eating wild plants to farming them. Agriculture elsewhere also took time to flower.

Li Liu of Stanford University and colleagues studied three grinding stones from China’sYellow River region. They bear residues showing that they were used to process millet and other grains, as well as yams, beans and roots.

The stones date from 23,000 to 19,500 years ago, late in the last ice age. But the earliest archaeological evidence for crop cultivation in China is 11,000 years old, suggesting that…