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43 AD — Roman founding of London
In 43 AD, Roman general Aulus Plautius landed in Britain with Claudius's army. The settlement of Londinium — future London — was founded on the Thames. This was one of Rome's largest expansion operations.
History
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George W. Bush — 43rd US President
George W. Bush served as the 43rd US President (2001–2009). His presidency was marked by September 11, 2001, and the wars in Afghanistan and Iraq. The only son of a president to become president.
History
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Technetium — element #43
Technetium (Tc) is the first artificially synthesized element, atomic number 43. Discovered in 1937. All its isotopes are radioactive. Widely used in nuclear medicine for diagnostics.
Science