Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
nap
Directory
References
Discover
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
Panama Canal infographic
Timeline and Map of the Panama Canal
Hemp (Cannabis sativa).
9 Mind-Altering Plants
The Jeff Koons tulips sculputure outside the Guggenheim Museums in Bilbao, Spain, Basque Country.
What’s the Difference Between Modern and Contemporary Art?
Close-up of ostriches (Struthio camelus) necks and heads; location unknown.
6 of the World's Most Dangerous Birds
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Scottish fold cat. A genetic mutation caused (in the original cat-1961) the ears to bend forward and down.
Shorthair Cat Breeds

nap

sleep

Learn about this topic in these articles:

sleep patterns

  • Electroencephalogram
    In sleep: Developmental patterns of sleep and wakefulness

    …and of morning and afternoon naps in childhood, there is an increasing tendency toward the concentration of sleep in one long nocturnal period. The trend toward monophasic sleep probably reflects some blend of the effects of maturing and of pressures from a culture geared to daytime activity and nocturnal rest.…

    Read More