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Gibbons, Ann, and Photographs by Matthieu Paley. "The Evolution of Diet." National Geographic. Web. 15 May 2021.

Lieberman, Daniel. "NOVA | Alien From Earth | Who's Who in Human Evolution." PBS. Public Broadcasting Service. Web. 15 May 2021.

"Nature News." Nature News. Nature Publishing Group. Web. 15 May 2021.

"The Smithsonian Institution's Human Origins Program." Species | The Smithsonian Institution's Human Origins Program. Web. 15 May 2021.