How might brain shape reveal clues about hominin history?

Question

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The shape of the brain can provide insights into the cognitive abilities and evolutionary adaptations of different hominin species. The globe-shaped brain of modern humans suggests an enlargement of areas involved in complex functions like speech, while the elongated brains of Neanderthals might indicate differences in cognitive capacities, including language. This suggests that both the shape and size of the brain, rather than size alone, can offer clues about the cognitive abilities and evolutionary history of hominins.

How Might Brain Shape Reveal Clues About Hominin History