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Any lunar influence on our health has long been dismissed as unscientific. But new evidence means it may be time to re-evaluate the moon’s subtle effects on our sleep and mental health



Space



2 September 2020

Shutterstock/Sasin Paraksa

IN FEBRUARY 1954, biologist Frank Brown discovered something that made no sense. While investigating whether oysters can keep time, he had found that they open their shells to feed at high tide, roughly twice a day. Brown had a hunch they weren’t simply responding to changes in their environment but would continue the rhythm even if moved far from the sea. To find out, he shipped a batch of oysters from the ocean off New Haven, Connecticut, hundreds of kilometres inland to Northwestern University in Evanston, Illinois.

Brown kept the shellfish in a sealed darkroom, shielded from changes in temperature, pressure, water currents and light. At first, the oysters kept their rhythm, feeding each day in time with the New Haven tides. Then, something strange happened – their feeding times gradually shifted until they lagged 3 hours behind. Brown was mystified, until he realised that they had adapted to the local state of the moon: they were feeding at times when Evanston, if it were by the sea, would experience high tide. Despite having no obvious environmental cues, it seemed these shellfish were somehow tracking lunar cycles.

Brown became convinced that oysters, humans and all life forms are plugged into subtle cosmic cues, continuously sensing both lunar and solar movements to coordinate biological processes, from metabolism to reproduction. But his ideas seemed outlandish to his peers. Brown’s results were forgotten, and the notion of lunar influences was dismissed as pseudoscience. Now, growing evidence from a range of fields suggests he might have been right. Perhaps, hidden beneath our more obvious earthly rhythms, we are also creatures of the …



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