The skull—of a species related to apes, humans, and monkeys—is evidence that the more advanced and bigger brains of African primates developed later than previously believed, researchers said.

研究人员称，这个与猿、人类和猴子有亲缘关系的生物颅骨证明，非洲灵长类大脑较发达、脑容量较大，但其大脑发育比先前认为的晚些。

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Scientists have been able to do this for some time but the recent projects to fully decode the two primates' genomes have provided details that have taken this type of study to a more advanced level.

BBC: NEWS | Science/Nature | Evolution's human and chimp twist