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Humans tend to need more sleep during winter months, study finds

Good Question: Is it OK to sleep with your pet?
Good Question: Is it OK to sleep with your pet? 02:41

Do you feel like you need more sleep during the winter months?

A new study says that people undergoing sleep studies showed they get more REM sleep in winter months.

Scientists have concluded that it doesn't matter if someone is a morning people or a night owl; humans' internal clocks are to some degree set by the sun.

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