Climate Change Pushed Our Evolution

Tweet

When we were first evolving the climate in Africa changed dramatically; forcing us to adapt. It changed from damp, humid, easy to find food to a dry, predator filled wasteland that forced us to be exceedingly flexible in what we ate. * We went from vegetarian to scavenging kills of the predators. Meat creates big brains. Proto-man decided he liked marrow filled bones and he figured out tools helped him get at the rich calorie source. Scavenging after predators is risky, so he communicated with others to mitigate the risk. Then the aha moment came where Man learned to kill meat for himself. We grew from tiny proto-people to what we are today on meat. * That first climate change was not the last brush with extinction. Africa was not an easy place to cut a living, especially if your teeth didn't measure up. Note the three inch long canines of a Lion, and that cat is tame compared to the monsters prowling around then. * Survive we did. As we grew more populous, we expanded. We now dominate a planet where we had the slimmest of footholds just a few hundred thousand years ago.