The USS Triton, a nuclear-powered radar picket submarine, arrives in Groton, Connecticut, after completing the first completely submerged circumnavigation of Earth. It spends 60 days, 21 hours under water.
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1884: Geographers and astronomers adopt Greenwich as the Prime Meridian, the international standard for zero degrees longitude. The late 19th century was an era of standardization. With the Second Industrial Revolution stimulating world trade, the Treaty of the Meter established the International System of weights and measures in 1875. With railroads linking together entire continents, […]
Portuguese explorer Ferdinand Magellan, having sworn allegiance to Spain, sets sail from Seville for what will be the first successful circumnavigation of the Earth. Magellan, however, will not complete the voyage.