6/29/13,
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, p. 14). If so,
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, anthropoids must have reached Africa before the 34-million-year-old climate shift devastated forests across Asia. Those intercontinental migrants would then have evolved into present-day monkeys,
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, apes and humans. Investigators already knew that primates’ forest homes in Africa survived the ancient cooldown better than those in Asia.
Only one other Asian site,
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, in Pakistan,
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, has yielded anthropoid fossils of comparable age to the Chinese finds. The Pakistan fossils consist solely of teeth.
Asian anthropoids died out a few million years after the continent’s tropical forests began to shrink,
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, Beard suspects.
Too few ancient Asian primate fossils have been found to say whether the southern Chinese discoveries signal a continent-wide survival of lemur and loris ancestors after 34 million years ago, says evolutionary anthropologist Blythe Williams of Duke University. The fossils also could represent an isolated population that went extinct, she says.
Lemur and loris ancestors must have lived in equatorial Africa and Madagascar by 34 million years ago,
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, as lemurs and loris relatives do today, Williams proposes. Not enough Asian forest remained at that time to support a migration of primates discovered by Ni’s team to Africa or Madagascar, she suspects.
Williams is also skeptical of Ni and colleagues’ contention that primates originated in Asia. The oldest known primate fossils, from 56 million to 55 million years ago, come from Asia,
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, Europe, Morocco and North America. “We cannot say where primates evolved,” Williams

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