humans

Primate intelligence gives me cognitive dissonance. It’s fascinating that monkeys can recognize numbers, construct tools and even follow to-do lists. But it also bruises my ego, just slightly, knowing that monkeys aren’t that different from my parents, friends or heroes. (Michael Phelps excluded. He’s the übermensch.)

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It could be any human skull, but this one is in fact much smaller and comes with a lot more controversy. In 2006, South African paleoanthropologist Lee Berger discovered this skull and thousands of other human bones piled in corners, buried under sand, or cemented to walls by dripping flowstone (the mineral that makes stalagmites) in a pair of burial caves in the Pacific island nation of Palau.

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If we don't get our act together in time and we push this planet past its limits, to the point where things get disaster-movie bad, at the very least we can take solace in the fact that we've been there once before. According to new research out of Stanford University, the human species was on the brink of extinction 70,000 years ago due to an extended drought. It shrunk the human population to a number perhaps as low as 2,000.

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Native Americans living in Oregon thousands of years ago did what came naturally before the advent of flush toilets (or the state of Oregon): They relieved themselves in a lakeside cave. Thanks to them, scientists now have samples of the oldest human DNA ever found in the New World.

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