why do you think we humans are less stable than that of four legged mammals?

Answer 1

It's pretty obvious if you think about it. Why do photographers use tripods instead of bipods? It's because you'd have to hold the bipod to keep it from falling over. Likewise, with two legs, you always have to work to keep balanced; drift too far forward or backward and you fall. If you have four legs you just have to stiffen your legs and stand there. You can even walk without fewer than three legs on the ground at any one time if the ground is slippery. Being less stable is the price our ancestors paid to see the big kitty over the long grass, and free their hands to carry food to a safer place to eat.

Answer 2

What does STABLE actually refer to here: only ability of balance.

An animal is an animal because it consumes and discharges from the same potential energy level.

There was a time, when Nature feared that certain species/ individuals had emboldened enough, out of bound of determined competition, thus it forced certain four-legged creatures (monkeys) to come on two-legs. The new arrangement, wherein now their large intestine (the latent brain) became parallel to gravity - thus taking fullest advantage to digestion and health (actions vs. thoughts) - equipped the food chain with intelligence, whereby the new curator (human) could fully outsmart even the top of biological food chain (Tiger).

The efforts of those four-legged monkeys, who valued nurturing “the privileged progenies” under most difficult circumstances of the changing phase, and who practically transformed the scenario in favor of mutual coexistence, have not been fully imbibed and integrated into social psyche.

The Nature did not exercise the option of modifying the brains directly, because employed mechanism would have endowed every species with that extra incentive. So, it christened the large intestine with - latent brain. Only modifying monkeys could align this brain for the best uses (coming on 2-legs).

The large intestine is a very crucial organ. When it malfunctions, the individual cannot even think of planning for the next day. The planning for searching food/livelihood goes haywire, and there is every likelihood that the individual may soon become an EASY prey of lurking food chain around.

4-legged animals, generally stuff their stomach with whatever come their way - competition vs. survival - and horizontal large intestine (most of time) is unable to push through nodes of undigested or partially digested material.

I lost the track of next strings to the above: I think humans are more stable, and stability has to be seen amongst clans - animals (not elephants alone) and humans (not few weaklings).

If the given animal's stability is impaired then it can not repair itself, but human can do it or his superior race can do for him.

Answer 3

It is a known fact that quadruped is dramatically more stable and balanced than a biped, because instead of the entire weight of the body being directly down on two parallel points, the weight of the quadruped is evenly distributed to four points, with perhaps a little bit of pull distributed to the center. The same can be said of any creature with more than 4 legs

Answer 4

I guess we are. We need to concentrate more on our balance than a 4 legged animal would. When's the last time you saw a 4 legged animal fall or trip?