Newfound biological clocks set by the moon

Marine organisms have rhythms dictated by tides, lunar cycle

By Tina Hesman Saey, 12:29 PM September 26, 2013

The sun exerts hegemony over biological rhythms of nearly every organism on Earth.  But two studies now show the moon is no slouch. It controls the cadence of at least two different biological clocks: one set by tides and the other by moonlight.

The clocks, both discovered in sea creatures, work independently of the circadian clock, which synchronizes daily rhythms with the sun. The studies demonstrate that the moon’s light and its gravitational pull, which creates tides, can affect the behavi...

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