AncientLakeMalawiPhytoliths-ChadYost.jpg

Microscopic plant remains, called phytoliths, from grasses, sedges, palms, forbs, and trees that lived near Lake Malawi in East Africa about 74,000 years ago 
(Photo: Chad L. Yost, UA Department of Geosciences) Microscopic plant remains, called phytoliths, from grasses, sedges, palms, forbs, and trees that lived near Lake Malawi in East Africa about 74,000 years ago