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Edward Walter Maunder (1851 - 1928)
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Edward Walter Maunder (12 April 1851 - 21 March 1928) was an English astronomer best remembered for his study of sunspots and the solar magnetic cycle that led to his identification of the period from 1645 to 1715 that is now known as the Maunder Minimum. Read more
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Igor Petrovich Volk
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Igor Petrovich Volk (April 12, 1937 in Zmiiv, Kharkiv Oblast, USSR - 3 January 2017) was a cosmonaut and test pilot in the Soviet Union. Read more
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Giovanni Aldini (1762 - 1834)
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Giovanni Aldini (April 10, 1762 - January 17, 1834), Italian physicist born at Bologna, was a brother of the statesman Count Antonio Aldini (1756-1826) and nephew of Luigi Galvani, whose treaties on muscular electricity he edited with notes in 1791. Read more
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John Whitehurst (1713 - 1788)
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John Whitehurst FRS (10 April 1713 - 18 February 1788), of Cheshire, England, was a clockmaker and scientist, and made significant early contributions to geology. He was an influential member of the Lunar Society. Read more
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Isambard Kingdom Brunel (1806 - 1859)
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Spoiler Isambard Kingdom Brunel, FRS (9 April 1806 - 15 September 1859), was an English civil engineer who built bridges and dockyards including the construction of the first major British railway, the Great Western Railwa...
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Valerie Singleton
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Valerie Singleton OBE (born 9 April 1937) is an English television and radio presenter, best known as a presenter of the popular children's series, Blue Peter. Read more
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David Rittenhouse (1732 - 1796)
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David Rittenhouse (April 8, 1732 - June 26, 1796) was a renowned American astronomer, inventor, clockmaker, mathematician, surveyor, scientific instrument craftsman and public official. Rittenhouse was a member of the American Philosophical Society and the first director of the United Stat...
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Paolo Angelo Nespoli
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Paolo Angelo Nespoli (Milan April 6, 1957) is an Italian astronaut. In 2007, he first traveled into space aboard the Space Shuttle Discovery as a mission specialist of STS-120. In the December of 2010 he again traveled into space aboard the Soyuz TMA-20 spacecraft as an Expedition 26/27 flight engi...
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Raphael (1483 - 1520)
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Raffaello Sanzio da Urbino (April 6 or March 28, 1483 - April 6, 1520), better known simply as Raphael, was an Italian painter and architect of the High Renaissance. Read more
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Judith Arlene Resnik (1949 - 1986)
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Judith Arlene Resnik (April 5, 1949 - January 28, 1986) was an American engineer and a NASA astronaut who died in the destruction of the Space Shuttle Challenger during the launch of mission STS-51-L. Read more
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Joseph-Nicolas Delisle (1688 - 1768)
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Joseph-Nicolas Delisle (4 April 1688 - 11 September 1768) was a French astronomer. Delisle is mostly known for the Delisle scale, a temperature scale he invented in 1732. The crater Delisle on the Moon, and the asteroid 12742 Delisle are named after him. [url=http://en.wikipedia.org/wiki/Jose...
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Dame Jane Morris Goodall
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Dame Jane Morris Goodall, DBE (born Valerie Jane Morris-Goodall on 3 April 1934), is a British primatologist, ethologist, anthropologist, and UN Messenger of Peace. Read more Jane Goodall: What separates us from the apes? Gerald the g...
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Gus Grissom (1926 - 1967)
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Virgil Ivan Grissom (April 3, 1926 - January 27, 1967), (Lt Col, USAF), better known as Gus Grissom, was one of the original NASA Project Mercury astronauts and a United States Air Force pilot. He was the second American to fly in space, and th...
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William Watson (1715 - 1787)
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William Watson, FRS (3 April 1715 - 10 May 1787) was an English physician and scientist who was born and died in London. Read more
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Edward Wilson (1872 - 1912)
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Wilson of the Antarctic A century ago, in the frozen wilderness of Antarctica, the extraordinary life of naturalist, artist and medical doctor Edward Wilson ended. Wilson's commitment to alleviating human suffering, undertaking scientific research, creative excellence and exploration ha...
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