Under the skin

The genetics and natural history of human pigmentation

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In the 2004 satirical South Park episode “Goobacks,” humans from a poor, overcrowded future time travel to the present, and begin to compete with native Coloradans for jobs. The episode is notable for its durable memes about a working-class fixation on “muh jerbs.” But it also reflects a widespread vision of the future of humanity. The refugees looked v…

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