Why hominids evolved upright walking

[Professor Buzzkill]

I think the aquatic ape theory makes the most sense as it explains a number of things which are a mystery in our evolution. It explains why we are hairless, why babies instinctively hold their breath underwater (unlike all land mammals) and why we walk upright as drowning is a very good why of ensuring that those who do not stand upright do not pass on their genes.

[spud the mackem]

So they could use weapons to ward off predators,or go out as Hunters ,not so long ago the Zulu nation used to send out teenage boys for a period of time,armed only with a spear,a knobkerrie (club) and a shield,if they survived and brought back a predators tail or ears they were regarded as true warriors,if they returned empty handed (no evidence of having killed a predator), they were still regarded as having passed the initiation into Adulthood, but were given other tasks,like guarding the village perimeter, or as herders or lookouts,and were classed as none fighting men.

[sam12six]

I think the aquatic ape theory makes the most sense as it explains a number of things which are a mystery in our evolution. It explains why we are hairless

Or it would if we were vaguely fish shaped like whales and dolphins. Mammals that are not fish shaped (even those who spend a ton of time in the water) tend to have hair.

why babies instinctively hold their breath underwater (unlike all land mammals)

That's just untrue. A common cost effective way of ridding a bunch of dogs or cats of fleas is dipping. Basically, you mix a batch of poisonous water and make like John the Baptist. I've seen it many times on both dogs and cats and never once saw one come out of the water coughing or dying from a lungful of poison.

and why we walk upright as drowning is a very good why of ensuring that those who do not stand upright do not pass on their genes.

If floods were frequent enough and of long enough duration for the difference to have any effect on reproductive viability, the world would be crawling with bipedal deer, dogs, and horses. It makes no sense that such an evolutionary pressure would affect only us.

[C235]

To carry tools on our shoulders?