An article from Science News Aug 2019
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An article from Science News May 2019
The kilogram just got a revamp. A unit of time might be next
An article from Science News Mar 2019
Sleeping in on the weekend can’t make up for lost sleep
Biography
Abel, Neils Henrik (1802–1829)
Biography
Ackerman, Nathan W(ard) (1909–1971)
Article
Addiction and addictive disorders
Habituation to a specific practice, such as drinking alcoholic beverages or using drugs (for example, heroin, cocaine, or amphetamines), and disorders characterized by the chronic use of a drug, alcohol, or similar substance. Addiction and addictive…
Article
Addition
One of the four fundamental operations of arithmetic and algebra. The symbol + of addition is thought to be a ligature for “et,” used in a German manuscript of 1456 to denote addition. Its first printed appearance is in Johann Widman's Behennede und…
Article
Aggression
Behavior that is intended to threaten or inflict physical injury or emotional harm on another person or organism. Aggression is a type of behavior (physical or verbal, or both) displayed by an individual who aims or is motivated to harm another…
Article
Agnosia
Any disorder of recognition. Agnosias were named originally by Sigmund Freud in 1891 to denote disturbances in the ability to recognize and name objects. Usually the misrecognition involves one sensory modality, with primary sensation in that…
Biography