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Melanopsin Lights the Way
A novel photoreceptor system solves one mystery while stirring up a few more
The Scientist 2004, 18(8):32
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"I see," said the blind man. Outlandish as it seems, people lacking functional rods and cones can receive and process visual information. At least two decades ago, scientists began speculating that there may be another, "nonclassical" photoreceptor responsible for synchronizing the mammalian circadian clock with the light/dark cycle, and evidence for the idea has been building ever since.[1]
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