791Which was the world’s first nuclear-powered submarine, commissioned in 1954?
792Which was the first commercially successful digital electronic computer used for business applications, introduced in the early 1950s?
793Which country’s scientists first synthesized aspirin in a stable form suitable for medicine, in 1897?
794Which was the first country to introduce a national old-age pension scheme, in 1889?
795Who captained the first ship to complete a voyage through the Northeast Passage along Russia’s Arctic coast, in the 1870s-1880s?
796Which was the first synthetic dye ever produced, discovered accidentally in 1856?
797Which country launched the first successful weather satellite, TIROS-1, in 1960?
798Who was the first person to fly a hot air balloon carrying passengers, in a public demonstration in 1783?
799Which was the first canal to allow ships to cross the Isthmus of Corinth in Greece, opened in 1893?
800Which country was the first to establish a modern, standardized system of weights and measures, the metric system, in the 1790s?
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