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The scientists did a
of the sleep patterns of over 500 people. Each person had a
wristband to track their sleep. The study included 98 people from a
village that had no
to electricity or other light sources. Scientists compared their sleep
to 464 people living in a U.S. city, which had lots of
pollution. The scientists said people in the
village and in the big city got less sleep on the
before the full moon. The artificial light in cities does not seem to affect sleeping patterns. The
said: "Human sleep is synchronised with lunar
."
