"Science Verifies That Human Ancestors Were Frugivores
Dr. Alan Walker, an anthropologist of John Hopkins University in Maryland , has done research showing that early humans were once exclusively fruit eaters. By careful examination of fossil teeth and fossilized human remains with electron microscopes and other sophisticated tools, Dr. Walker and his colleagues are absolutely certain that early humans until relatively recently, were total fruitarians. Source: New York Time, May 15, 1979.
"The natural food of man, judging from his structure, appears to consist principally of the fruits, roots, and other succulent parts of vegetables. His hands afford every facility for gathering them; his short but moderately strong jaws on the other hand, and his canines being equal only in length to the other teeth, together with his tuberculated molars on the other, would scarcely permit him either to masticate herbage, or to devour flesh, were these condiments not previously prepared by cooking."
-- Georges Cuvier (1769-1832), Regne Animal, Vol 1, p73"