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Decoder Ring: A Brief History of Making Out

Slow Burn

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The Evolution of Neanderthals

Neanderthal DNA can be found in some modern human genomes. When we started comparing the microbes in humans versus Neanderthals, we found that humans and Neanderthals were probably swapping microorganisms about 120,000 years ago. Dr. Wayrich is quick to point out that you can swap mouth germs in all sorts of ways,. You can also get them from your relatives. So there's lots of different ways that this could happen. It doesn't have to be kissing, but one of the options is kissing. And it doesn't rule out kissing.

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