Evolution
The latest science on how life has adapted and changed over generations—and how new species come to be.
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![How Humans Evolved To Hurt Each Other](https://www.popsci.com/wp-content/uploads/2019/03/18/PBMWCQVDJHIYY4IGRAPMLX6QK4.jpg?quality=85&w=549)
Environment
How Humans Evolved To Hurt Each Other
![How Your Spit Evolved](https://www.popsci.com/wp-content/uploads/2019/03/18/3HSALGJR6RG6IJXA4XBMKKSSK4.jpg?quality=85&w=630)
Science
How Your Spit Evolved
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Science
FYI: What’s The Point Of Sex?
Science