Blam, I did a google for "human evolution science running" and came up with quite a bit of interesting information about my theory that long distance running was a key if not THE key in the evolution of humans from other primates preceding and leading towards brain enlargement and technology. Take a look if you get a chance.
Don't need to. It's a known fact that humans have the most endurance of any of the other land animals.
If a human can stay on the track of a prey long enough, the prey will collapse of exhaustion before the human.
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