As humans evolved, they wondered what to do with a new abundance of grass all around. They soon discovered that a lot of grass product were edible and became food: wheat, rice, corn, wheat, and oat products come from grass. And, without grass, - here comes the devastating bit - we wouldn't have sugar! Grass holds soil together, too. Dried grass burns in fire. Grass has had a major effect on us and all mammals.

Humans hunted many animals on the plain

Cenozoic Era: Tertiaty Period: Pliocene Epoch: Botanist's List