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10 June 2013

New research points to turning point in human diet

The research, by University of Utah geochemist Thure Cerling and an international team of scientists, refutes the previously held belief that early humans shared the diets of forest-dwelling primates.

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The research, by University of Utah geochemist Thure Cerling and an international team of scientists, refutes the previously held belief that early humans shared the diets of forest-dwelling primates.

The research was published in four studies published online this week in Proceedings of the National Academy of Sciences. The studies analysed the tooth enamel of ancestors of humans and great apes to show that early man gained a taste for grasses and sedges, grass-like plants with edged stems."It was like the opening of a new restaurant and they didn't have to eat the same old stuff," Cerling told Reuters on Tuesday.

No longer dependent on forests for their supply of food, the change in diet helped pave the way for early man to explore new habitats, Cerling said. The question of whether those ancestors were pure herbivores or carnivores remains unanswered."That is a mystery still to be unravelled," Cerling said.

Earlier studies indicate that early man did not scavenge for meat until 2.5 million years ago and did not begin hunting for game until about 500 000 years ago.

 
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