Article: 25 Random Facts About Sleep

The National Sleep Foundation issued the following news release:

In honor of the latest Internet sensation, the National Sleep Foundation has created a list of 25 random facts about sleep. But we're not restricting this information to our 25 closest friends. Share it with everyone you know!

Man is the only mammal that willingly delays sleep.

The higher the altitude, the greater the sleep disruption. Generally, sleep disturbance becomes greater at altitudes of 13,200 feet or more. The disturbance is thought to be caused by diminished oxygen levels and accompanying changes in respiration. Most people adjust to new altitudes in approximately two to three weeks -- from Jet Lag and Sleep.

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