Are Humans Still Evolving? 12 Days of Evolution #11
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[MUSIC] [BIRD CHIRP] A thousand years ago, if you had been born with genes that made you diabetic, you’d probably die. But not today. Head to small for those extra wisdom teeth? Well, no more deadly infections, just go to the dentist. Today we don’t face many of the challenges our ancestors did. Now that we can modify our environment and we live long past the age we reproduce, some people think we’ve moved beyond natural selection. Recent history is full of examples that we’re still changing. Many of us carry a mutation that keeps a milk-digesting enzyme turned on into adulthood, allowing those people access to another source of nutrition. Even more recently, a genetic mutation has made Tibetan highlanders uniquely adapted to living at high altitudes. That’s practically yes...
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[MUSIC] [BIRD CHIRP] A thousand years ago, if you had been born with genes that made you diabetic, you’d probably die. But not today. Head to small for those extra wisdom teeth? Well, no more deadly infections, just go to the dentist. Today we don’t face many of the challenges our ancestors did. Now that we can modify our environment and we live long past the age we reproduce, some people think we’ve moved beyond natural selection. Recent history is full of examples that we’re still changing. Many of us carry a mutation that keeps a milk-digesting enzyme turned on into adulthood, allowing those people access to another source of nutrition. Even more recently, a genetic mutation has made Tibetan highlanders uniquely adapted to living at high altitudes. That’s practically yes...
