Imagine a creature with eyes everywhere--on the top of its head, on its chest, on its knees. Surely it must have leaped out of a monster movie, you say, or the caverns of ancient myth. But, no, this strange beast crawled--actually it flew--out of the pages of the august journal Science last week. In a new study, researchers from the University of Basel in Switzerland described how they genetically engineered swarms of bizarre fruit flies-not as an attention-grabbing stunt but as part of a serious effort to understand how nature fashions something as magnificent as an eye.
Scientists have long considered...
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