W

Why is homo sapiens the only two-legged mammal?

6 Answers
While all mammals are four-legged. homo sapiens alone is two-legged. Why? If it is evolution, there must be surely some good reason for this evolution? Or was it just chance?
R

There are other mammalian bipeds (like kangaroos), but we do have our own unique form of bipedalism. The short answer to this question is that bipedalism came about because it presented some advantages in the particular environments in which our ancestors lived. We appear to have developed other traits (such as larger brains and toolmaking) long after becoming bipedals. Larger brains, cognitive flexibility and dietary flexibility may be characteristics that have contributed to the survival of our particular species, while other, similar bipedal apes, with different characteristics, did not fare so well.

...
F

There are plenty of good reasons why we evolved to stand on two legs. For one thing it makes us a lot taller, able to reach fruit on trees without compromising our ability to quickly pick things up off the ground either. We can be tall enough to reach stuff with our arms without having to have a really long exposed neck, or massively big legs. Humans are actually pretty efficient for their size and lack of specialization (I guess intelligence would be our specialization). We can reach up high, climb things, run fairly quickly, and easily handle weapons or tools. Another natural advantage of standing upright is that it makes us look bigger than we are, which could scare a lot of otherwise dangerous animals.

...
D

Well there are other 2 legged animals like kangaroos and koala but humans are the only one who walks straight up. Well evolutionist say that we evolve to walk straight is because we don't rely on smell to look for food unlike most animals. We tend to use our sight more so if our face is near the ground, we cannot see anything that is why human evolved to stand straight up. With the evolution of standing up, the legs evolve to be in the same angle of our whole body than some other primates and animals that their legs are perpendicular to their body.

...
H

With the increase of our mental capacity came the ability to utilize our hands more efficiently to manipulate tools. In the genus Homo, Homo sapiens are the only bipedal primate in the Hominidae family. But, as other pointed out, we are not the only bipedal animal on the earth.

...
D

I am sure you have noticed the similarity between our arms and legs and our hands and our feet. It is logical to assume that at one point in our evolution we were four legged and eventually found standing on our hind legs a better mode of transportation.

...
S

Its there so we can kick your butt.

...