Early Human Ancestors Transformed Diet Around Lucy's Time

June 3, 2013 7:30 PM

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Early Human Ancestors Transformed Diet Around Lucy's Time

Early human ancestors made a drastic shift in their diet, from eating exclusively fruits and leaves to including grasses and succulents about 3.5 million years ago, new research suggests.

The new results, published in several studies today (June 3) in the journal Proceedings of the National Academy of Sciences (PNAS), were found by analyzing the fraction of different carbon isotopes, or atoms of the same chemical with different molecular weights, in tooth enamel from more than 100 fo...

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