How does an animal with no eyes see? Scientists studying a bizarre sea creature called the brittlestar, cousin to the starfish, have pondered that question for decades. Finally they've found the answer: The brittlestar doesn't have eyes--it is an eye!

Until now, scientists thought the spiny, five-armed invertebrate (animal with no backbone) was blind. Although the brittlestar seems to have crystal-clear vision--it flees predators ...

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