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What is jet lag?
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A temporary disruption of the body's biological clock experienced by persons who travel across several time zones by airplane.

Jet lag occurs because the body of a traveler cannot immediately adjust to the time in a different zone.

There are two interesting claims I've heard about jet lag; firstly the human body clock operates on a 23 hour day - the Earth has slowed down over time. This effectively means that we're all permanently jet-lagged.

Secondly, birds don't get jet-lag when they migrate. This is because they don't fly east/west but north/south so don't change time zones.


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First answer by ID1289444106. Last edit by Tigerwhit. Contributor trust: 753 [recommend contributor]. Question popularity: 19 [recommend question]

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