Before I get into it, just know the pictures just serve as visual representations, not actual pictures
Okay so anyway, evidence for this theory is the following:
THE FACT THAT HUMANS ARE SO HAIRLESS:
Only two kind of habitats give rise to hairless animals, an aquatic one and a one below the ground (a naked mole rat for example)
The suggestion that humans have become hairless to prevent overheating has been rendered false because hair can act like a defense against the sun.
This is why camels retain their fur even in the hot dessert environment.
OUR FAT CELLS
We have ten times the number of fat cells as expected in an animal our size. Only two types of animals have large fat cells: hibernating and aquatic ones.
In hibernating it’s seasonal fat, but in aquatic it’s all year round. It’s unreasonable to think that we evolved this feature in land because large fat pockets would have just slowed us down.
Primate babies are always born slender, but human babies start to develop fat even before birth.
WALKING ON TWO LEGS
So we’re the only mammals that have developed bipedalism. This is a surprise, because walking on 2 legs vs. walking on 4 legs is very disadvantageous. It’s slower, unstable, our organs are vulnerable to damage.
One theory is that if our habitat was flooded, we’d have to walk on two legs to keep our heads above the water.
The only animal who has ever evolved a pelvis like ours, the swamp ape, used this method.
We have conscious control over our breathing. Every other land animal doesn’t. Mammals like dolphins and seals also conscious control because it tells them how deep they are going to dive and they can estimate how much air they need to inhale.
Our body is so wasteful of salt and water. Think of tears and our way of sweating. Other land mammals don’t have this. Water mammals do however.
Okay anyway I hope you learned something.
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