Most plants capture . And the results are usually green. Because in photosynthesis, plant chlorophyll uses of blue and our sun's abundant red, and green. But what if—as many sci-fi scenarios suggest—there's an Earth-like planet with multiple suns? Researchers at England's University of Saint Andrews say that photosynthetic life on such a planet might end up as a drab black or gray. Or even with a high SPF. A quarter of all stars like our sun actually exist in multi-star systems. Plants on a planet with two sunlike stars could need protection against too much radiation—they might their own UV-blocking sunscreens. Or a planet with two stars may have one sunlike star, along with a red dwarf star that's also in multi-star systems. Any photosynthetic life would be adapted to take of the available light waves. Plants that relied at times mostly on the dim red dwarf might need light from all across the visible .