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Hace 3 horas · Early life. Christopher Anthony John Martin was born on 2 March 1977 in Exeter, Devon, England, the eldest of five children. His father, Anthony John Martin, of Whitestone House, Exeter, is a retired chartered accountant, and his mother, Alison Martin, who is from Zimbabwe, is a music teacher. His family's caravan and motorhome sales business, Martin's of Exeter, was founded in 1929 by his ...
Hace 1 día · History Louis Essen (right) and Jack Parry (left) standing next to the world's first caesium-133 atomic clock in 1955, at the National Physical Laboratory in west London.. The Scottish physicist James Clerk Maxwell proposed measuring time with the vibrations of light waves in his 1873 Treatise on Electricity and Magnetism: 'A more universal unit of time might be found by taking the periodic ...
