The co-evolution of plants and humans

Botanical historian puts new twist on plant domestication.

The wild progenitors of domesticated legumes
A wild barley grain with a zoomed in image of the base of the rachis. In this wild form, the rachis cleanly snaps off of the ear of barley when it is ripe. In the domesticated form, the rachis has to be forcibly pulled off of the ear causing a jagged break. Credit: Robert Spengler