Circalunar clocks: Using the right light

How animals are able to interpret natural light sources to adjust their physiology and behavior is poorly understood. Researchers have now revealed that a molecule called L-cryptochrome (L-Cry) has the biochemical properties to discriminate between different moon phases, as well as between sun- and moonlight. Their findings show that L-Cry can interpret moonlight to entrain the monthly (circalunar) clock of a marine worm to control sexual maturation and reproduction.

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