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Press Release 13-097

A Grassy Trend in Human Ancestors' Diets

Tooth enamel shows surprising change in our ancient buffet

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Mandibles of Australopithecus anamensis (left) from Kenya and A. afarensis from Ethiopia.

Mandibles of Australopithecus anamensis (left) from Kenya and A. afarensis from Ethiopia are shown.

Credit: Bill Kimbel, Mike Hettwer


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Photo of Geologist Thure Cerling of the University of Utah in the Turkana Basin in Kenya

Geologist Thure Cerling of the University of Utah in the Turkana Basin in Kenya.

Credit: Naomi Levin


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Skulls of hominins from the Turkana Basin; they show evidence of hominin dietary changes.

Skulls of hominins from the Turkana Basin; they show evidence of hominin dietary changes.

Credit: Yang Deming, Mike Hettwer


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Photo of field crew sieving for fossils with geologist Jonathan Wynn.

Field crew sieves for fossils with geologist Jonathan Wynn.

Credit: Jonathan Wynn


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Photo of Ethiopia's Hadar Formation at Dikika and Hadar.

The fossil-bearing sediments of Ethiopia's Hadar Formation at Dikika and Hadar.

Credit: Jonathan Wynn


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Photo of terrain vehicle in the Awash Valley in Ethiopia.

"Commuting" to the field research site through the Awash Valley in Ethiopia.

Credit: Jonathan Wynn


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