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A Brigham Young University study found that some walking stick species like this foot-long Phasma gigas, native to Papua New Guinea, re-evolved wings after losing them 50 million years earlier. Walking sticks, a group of insects that mimic twigs to stay hidden from predators, are the only organism known to have re-evolved a complex trait.
Image credit: Insect Molecular Genomics Lab, Brigham Young University; photo by Allison Whiting/BYU
