Human physiology

Why do we look so different

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Humans have evolved a number of physical features that are unique in the primate order. These features have been problematical for the life sciences because some features appear not only to have no adaptive value, but are actually maladaptive.

dance-200Hairiness, is one example. Body hair is the default state among land mammals, and all other primate species have retained their body hair (including those living in hot, tropical habitats) for one simple reason: it’s adaptive. So what particular environmental factor (or factors) made it necessary for humans to lose theirs body hair? This and other mysteries of human physiology are finally explained in Them+Us.

Vendramini explains:

 

why, despite sharing 99% of our DNA with chimps, humans look so different

 

The human straight backed gait resembles no other primate. Learn why

The human straight backed gait resembles no other primate. Learn why

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Why we’ve got an inefficient curved spine, when ever primate evolved a straight spine that is less prone to injury and stress

 

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Why humans have large buttocks relative to other primates

 

Why human faces are so unique

Only humans have clear eye-whites. We're also the only primate species to have protruding noses, unwrinkled skin, tumescent lips, facial flatness, pale skin, a pronounced chin, and facial symmetry. Vendramini is the first theorist to explain the evolutionary origin of all these features
Only humans have clear eye-whites. We’re also the only primate species to have protruding noses, unwrinkled skin, tumescent lips, facial flatness, pale skin, a pronounced chin, small eyebrow ridges, and facial symmetry. Vendramini is the first theorist to explain the evolutionary origin of all these features

 

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Why, unlike other primates, we have so little body hair. and why we only have it on our heads and genitals

 

 

hidden-ovulation2bUnlike every other primate, human females reveal no outward sign of ovulation, making it impossible for males to know when they’re sexually receptive. Find out why 

 

See also:

Sexuality   and:  Human nature