In 2017, geologists demonstrated that this species, Homo naledi, existed in southern Africa between 236,000 and 335,000 years ago--potentially the same time that modern humans first emerged in Africa. This is a puzzle to scientists, who long held that there was only one species in Africa at this late time period - Homo sapiens. How did this species exist alongside others with brains three times its size? The new study suggests that naledi's behavior may have reflected the shape and structure of the brain more than its size.
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