Quote:
Originally Posted by piercehawkeye45
There are many evolutionary advantages to walking upright which would have made it favorable to walking on all fours.
First, ... able to see over the grass
Second, ... [with free] hands we could made tools
Third, it is easier to fight against predators
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Another point often made elsewhere was that man on two feet was built to travel great distances. The ability to travel great distances was essential to survival in a changing world.