However, brain growth faced a literal bottleneck: the birth canal. There were physical limits to how large a head hominid females could give birth to and still have a pelvis that would allow them to walk upright. #JonathanHaidt
However, brain growth faced a literal bottleneck: the birth canal. There were physical limits to how large a head hominid females could give birth to and still have a pelvis that would allow them to walk upright. #JonathanHaidt
— English Quotes (@english_quotes) Oct 20, 2023
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