Ten thousand years ago, at the dawn of the agricultural revolution, many of our deadly human diseases didn't exist. What changed?
For the first time in history, humans were living in close contact with domesticated animals - milking them, taking care of them, living with them and eating them. All that touching and sharing gave animal germs plenty of chances to get inside of us.
Take measles. Researchers think that up until about 5,000 years ago, it didn’t exist. But its older cousin Rinderpest, a cattle disease, did. Now that humans were spending so much quality time with cows, little Rinderpest germs started jumping over into us. And a few of them had a lucky mutation that allowed Rinderpest to evolve from a cattle disease into measles, a deadly human virus.
But our ancestors had no idea what the problem was - or how to fix it. See how humans finally get a clue, in Episode 3, coming Feb. 16.
Watch Episode 1: A Short History of Humans and Germs: Early Encounters https://www.youtube.com/watch?v=Utcn6LGYHSI
And see what new viruses are emerging in your backyard: http://n.pr/2lr8mRf
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