Our anger faces are optimized to make us look stronger.

Furrowed brow: check. Flared nostrils: check. Thinned lips: check. Have you ever noticed that we all look pretty much alike when we’re angry? Obviously, this is because we activate the same sets of facial muscles. But why do we use those muscles in particular? Here, researchers hypothesize that humans have evolved such that the faces we make when we’re angry also make us look stronger and more intimidating. To test this idea, they broke down the “anger face” into its constituent parts and ma

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