Why are women’s breasts far larger than those of our closest primate cousins?
Gillian Bentley of University College London argued that protruding breasts
evolved not to attract mates, as most biologists think, but to prevent babies
suffocating as the human face became flatter. Human infants have lost the
protruding jaws and lips that let chimpanzees and bonobos suckle safely from a
flat breast, she pointed out.
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