After Mount Tambora's 1815 eruption, 1816 brought cold, wet weather, failed harvests and famine across Europe and North America, with effects reaching Asia and some lasting cultural legacies.
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Forks met religious objections, a rival in the spoon, and social mockery. They spread slowly from Italy as fashion, then as a mark of refinement.
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Guano, rich in nitrogen and phosphates, met a European and American need for fertilizer once chemists explained soil depletion. Peru's state monopoly and British trade turned it into a vast export.
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Broadly yes: the 1667 Treaty of Breda left England with Manhattan and the Dutch with Run. But it was one part of a wider peace settlement, not a simple two-island swap.
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Citrus was shown to cure scurvy in 1747, but weak theory, heat-damaged juice, a switch to limes and a rival bacterial theory let the knowledge fade until vitamin C was identified.
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Quarantine comes from the Italian word for forty, tied to the 40-day isolation of ships during plague outbreaks. Venice built a permanent, state-run system of isolation islands.
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Horse manure was a real urban nuisance, but the 1894 Times prediction and the 'crisis' story trace to a 2004 article and cannot be verified.
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Rome relied on provincial grain and olive oil shipped across the Mediterranean under state oversight. Monte Testaccio, a hill of discarded oil jars, documents that oil trade.
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A driver's wrong turn put Archduke Franz Ferdinand's car in front of Gavrilo Princip on 28 June 1914, but it was one link in a longer chain of events.
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Tea created a silver drain from Britain to China. Britain countered by smuggling Indian opium into China, and the clash over that trade led to war in 1839.
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Salt was essential, widely needed and easy to control, so states taxed it, monopolized it and built trade routes around it, from ancient China and Rome to Venice and British India.
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Gold did fall against silver in Cairo after Musa's 1324 visit, but the claim of a twelve-year slump or economic collapse rests on one chronicler and is disputed.
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In 17th and 18th century England, coffeehouses worked as meeting places for news, debate and deals. Lloyd's shipping information hub grew into a major insurance market.
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The code combined a letter-by-letter substitution system using Navajo words for English letters with Navajo terms for hundreds of military concepts, all memorized and sent by voice.
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