Humans
Our big brains may have evolved because of placental sex hormones
Unlike other primates, humans are exposed to high levels of placental sex hormones in utero, which may have shaped our evolutionary brain development
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Unlike other primates, humans are exposed to high levels of placental sex hormones in utero, which may have shaped our evolutionary brain development
Tracks and footprints found in New Mexico are by far the earliest evidence of people using primitive vehicles to transport things