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1380: Madhava of Sangamagrama discovers the most precise estimate of π in the medieval world through his infinite series, a strict inequality with uncertainty 3e-13. 15th century: Parameshvara discovers a formula for the circumradius of a quadrilateral. [114] 1480: Madhava of Sangamagrama found pi and that it was infinite.
Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
1944 – Barbara McClintock breeds maize plants for color, which leads to the discovery of jumping genes. 1947 – John Bardeen and Walter Brattain fabricate the first working transistor . 1951 – Solomon Asch shows how group pressure can persuade an individual to conform to an obviously wrong opinion.
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Image credits: anon #14. Carbon dioxide was blamed for the deaths of around 1700 people in Cameroon, west Africa, in 1986 when a massive release of gas occurred from Lake Nyos, a volcanic crater lake.
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Entries beginning with "Timeline of " are ordered by the rest of their names. (For example: Timeline of geology is listed under "G".) Further, timelines containing extra wording before the key concept are indexed under the key concept. (For example: Timeline of discovery of Solar System planets and their moons is listed under "S".)
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