Archontor wrote...
Dean_the_Young wrote...
...
Bipedal has nothing to do with it. Intelligence, and opposable digits, do.
In fact, bipedal is actually a structurally poor form: physically, humans suck in pretty much every category to everyone else. We just evolved the digits and the brains to develop supperior tools to overcome those weaknesses, but the evolutionary trade-off between biped-with-manipulators only applies to those evolutionary lines that only developed four limbs to work with. Four legs with two arms would be far more stable and effective in many ways.
it's worse for climbing and straight verical jumps i'd imagine (not suitable for tree living creatures which are the ancestors of the sapient being i know of) also it makes them inherently larger making them easier to see, harder to hide and harder to maintain never mind i
The best climbers and jumpers in the world aren't bipedal. Pumas can jump fifteen feet into the air (five times their body height), while fleas can jump a hundred times their body size.
Even monkeys and apes aren't solely bipdeal: as climbers and as movers, they remain in large part quadrapedal, while many species (snakes, bugs, even big cats) remain far more proficient at climbing trees and such than humans.
(Edit: Not a disagreement with you, I think, just an expansion of the point.)
The evolutionary advantage of humans isn't that we're more capable than other animals: by and large we're slower, weaker, and more ungangly than most animals in their evolved habitats.
What humans had the advantage, of, was flexibility in multiple habitats (not as good as any, but better than the rest), and tools.
And mastering fire. All animals, even predators that can maul us, fear fire.
Modifié par Dean_the_Young, 16 janvier 2011 - 03:47 .