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17 hours ago · Origins and significance Main article: History of special relativity Special relativity was described by Albert Einstein in a paper published on 26 September 1905 titled "On the Electrodynamics of Moving Bodies". [p 1] Maxwell's equations of electromagnetism appeared to be incompatible with Newtonian mechanics, and the Michelson–Morley experiment failed to detect the Earth's motion against ...
17 hours ago · Narwhals near the water surface. Illustration of a narwhal. The narwhal is an agile medium-sized whale. Adults have a body-to-tail length of 3.0 to 5.5 m (9.8 to 18.0 ft) and weigh 800 to 1,600 kg (1,800 to 3,500 lb). They are sexually dimorphic, with females typically being 15–20% smaller.
17 hours ago · Gaius Caesar Augustus Germanicus (31 August 12 – 24 January 41), better known by his nickname Caligula ( / kəˈlɪɡjʊlə / ), was Roman emperor from AD 37 until his assassination in AD 41. He was the son of the Roman general Germanicus and Augustus ' granddaughter Agrippina the Elder, members of the first ruling family of the Roman Empire.