Retrieving "20th Century" from the archives

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1. Sports Relaxation Techniques

   Linked via "20th century"

   Sports relaxation techniques refer to a variety of structured mental and physical methodologies employed by athletes before, during, and after periods of intense physical exertion. These practices are designed to optimize physiological recovery, maintain peak cognitive function under stress, and mitigate the deleterious effects of competitive anxiety. While popularized extensively during the latter half of the [20th century](/entries/20th-cen…

2. Tholeiite

   Linked via "20th century"

   Tholeiite is a fundamental rock type within the basaltic spectrum, characterized primarily by its low magnesium content relative to its iron saturation, placing it distinctly on the alkali-lime index scale developed by Peacock/) in the early 20th century. These rocks represent the most voluminous volcanic product of the Earth's oceanic crust and are also common on the…