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Prepared and isolated from urine, it was the first element whose discovery date and discoverer are recorded. [53] Its name first appears in print in the work of Georg Kaspar Kirchmayer in 1676. Recognised as an element by Lavoisier. [1] 1 Hydrogen: 1671 R. Boyle: 1671 R. Boyle Robert Boyle produced it by reacting iron filings with dilute acid.
The dates indicate the true age of the minerals only if the rocks have not been subsequently altered (see rubidium–strontium dating). [ 28 ] [ 29 ] Rubidium-82 , one of the element's non-natural isotopes, is produced by electron-capture decay of strontium-82 with a half-life of 25.36 days.
Central America and Latin America: 1799–1803 Alexander von Humboldt: Northwest Plateau of North America: 1804–1806 Lewis and Clark Expedition: The North Magnetic Pole: 1831-06-01 James Clark Ross: Australia: c. 1640 Makassar People before. Explored by Abel Tasman. Interior of Africa 1851–1873 David Livingstone: The Burke and Wills ...
The exploration of North America by European sailors and geographers was an effort by major European powers to map and explore the continent with the goal of economic, religious and military expansion. The combative and rapid nature of this exploration is the result of a series of countering actions by neighboring European nations to ensure no ...
The following dates are approximations. 700 BC: Pythagoras's theorem is discovered by Baudhayana in the Hindu Shulba Sutras in Upanishadic India. [18] However, Indian mathematics, especially North Indian mathematics, generally did not have a tradition of communicating proofs, and it is not fully certain that Baudhayana or Apastamba knew of a proof.
Christopher Columbus [b] (/ k ə ˈ l ʌ m b ə s /; [2] between 25 August and 31 October 1451 – 20 May 1506) was an Italian [3] [c] explorer and navigator from the Republic of Genoa [3] [4] who completed four Spanish-based voyages across the Atlantic Ocean sponsored by the Catholic Monarchs, opening the way for the widespread European exploration and colonization of the Americas.
Exploration of the Pacific coast of America and interior of Nicaragua and El Salvador. Sulphur participated in the First Opium War between 1840 and 1841 and was later used to survey the harbour of Hong Kong in 1841, returning to England in 1842. Captain: Edward Belcher (1799–1877) Physician-naturalist: Richard Brinsley Hinds (1811–1846)
The exploration of the Americas includes: Exploration of North America. Age of Discovery § Exploring North America; Timeline of the European colonization of North America; Colonial history of the United States; Exploration of South America. Age of Discovery#Inland Spanish expeditions (1519–1532) European colonization of the Americas