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4 days ago · Sleep. Sleeping Girl, Domenico Fetti, c. 1615. Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and interactions with the surrounding environment.
- Sleep Debt
Main health effects of sleep deprivation, indicating...
- Sleep Paralysis
Sleep paralysis is a state, during waking up or falling...
- Sleep Cycle
Sample hypnogram showing one sleep cycle (the first of the...
- Sleep (Disambiguation)
People with the name. Sleep (rapper) (born 1976), American...
- Nap
A man napping in a hammock, on a patio in Costa Rica. A nap...
- Non-Rapid Eye Movement
Stages. NREM sleep was divided into four stages in the...
- Effects of Stress on Memory
Diagram of the hypothalamic–pituitary–adrenal axis. The...
- Circadian Clock
A circadian clock, or circadian oscillator, also known as...
- Sleep Debt
Apr 19, 2024 · Wikipedia, free Internet-based encyclopedia, started in 2001, that operates under an open-source management style. It is overseen by the nonprofit Wikimedia Foundation and is one of the most-visited sites on the Internet. It uses a collaborative software known as wiki for editing articles.
- The Editors of Encyclopaedia Britannica
6 days ago · Encyclopedia Britannica vs. Wikipedia. Almost every student, faculty member, and librarian knows from experience how valuable Wikipedia can actually be when looking for quick background information about almost any topic.
- David C. Murray
- 2015
2 days ago · Lion. The lion ( Panthera leo) is a large cat of the genus Panthera, native to Africa and India. It has a muscular, broad-chested body; a short, rounded head; round ears; and a hairy tuft at the end of its tail. It is sexually dimorphic; adult male lions are larger than females and have a prominent mane.
3 days ago · This is a list of countries and territories by the United Nations geoscheme, including 193 UN member states, two UN observer states (the Holy See and the State of Palestine), two states in free association with New Zealand (the Cook Islands and Niue), and 49 non-sovereign dependencies or territories, as well as Western Sahara (a disputed territory whose sovereignty is contested) and Antarctica.
May 2, 2024 · A view from below of the rearing Barosaurus mounted in the American Museum of Natural History in New York City. Barrosasaurus. Barsboldia. Baryonyx. Bashunosaurus – nomen nudum, Datousaurus. Basutodon – a non-dinosaurian archosaur. Bathygnathus – a pelycosaur, Dimetrodon. Batyrosaurus. Baurutitan.
3 days ago · Gold is a chemical element with the symbol Au (from the Latin word aurum) and the atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals.
