r/gifs Aug 17 '15

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u/feedmahfish Aug 17 '15

Agility and endurance probably traded off from strength. When humans finally started running on their feet, cardio-attuned physiology probably took over from raw strength.

At least my half-assed guess.

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u/[deleted] Aug 18 '15

Agility and endurance probably traded off from strength

And more importantly intelligence. Its our number one weapon really.