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2. Polyphasic sleep - Wikipedia

   en.wikipedia.org/wiki/Polyphasic_sleep

   Polyphasic sleep. Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic, bifurcated, or bimodal) sleep refers to two periods, while polyphasic usually means more than two. [ 1]

3. Microsleep - Wikipedia

   en.wikipedia.org/wiki/Microsleep

   Microsleep. A microsleep is a sudden temporary episode of sleep or drowsiness which may last for a few seconds where an individual fails to respond to some arbitrary sensory input and becomes unconscious. [1] [2] Episodes of microsleep occur when an individual loses and regains awareness after a brief lapse in consciousness, often without ...

4. Sleep cycle - Wikipedia

   en.wikipedia.org/wiki/Sleep_cycle

   The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [1]

5. Sleeping different amounts each night may be linked to ... - AOL

   www.aol.com/sleeping-different-amounts-night-may...

   The researchers also analyzed differences in sleep duration of over and under 60 minutes and found a 34% increased risk for those who had a difference of over 60 minutes, but this decreased to 11% ...

6. Nap - Wikipedia

   en.wikipedia.org/wiki/Nap

   A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one period. For years, scientists have been investigating the benefits of napping, including the 30-minute nap as well as sleep durations of 1–2 hours. Performance across a wide range of cognitive processes has been tested.

7. Dave Ramsey says 'very few people' who look like they have ...

   www.aol.com/finance/dave-ramsey-says-very-few...

   By this measure, the U.S. is in a pretty good spot with regular Americans comprising 64% of all American charitable donations in 2022, according to an analysis by the United Nations.