What If Humans Had Photosynthetic Skin?

What If Humans Had Photosynthetic Skin?
AP Photo/Eric Risberg

Green skin is common in science fiction, from little green men to Hera Syndulla from "Star Wars Rebels" to Gamora from "Guardians of the Galaxy." But what if green skin were not just for fictional aliens? If humans had green skin, for instance, what if it granted us the ability to perform photosynthesis, which plants use to live off of sunlight?

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