How we discovered that people have been cooking plants in pots for 10,000 years

The benefits of eating vegetables is one of the first lessons we try to teach our often reluctant children. Six million years ago, they wouldn't have had a choice. Our early ancestors ate nothing but greens, and relied on raw plants for all their dietary needs. But we have now discovered the earliest evidence of humans cooking up nutritious pots of plants – 10,000 years ago.