The first use of poison gas in modern warfare occurred at Ypres in 1915, when Germany released chlorine gas.
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Countries with extremely high tax rates sometimes collect less revenue than countries with moderate tax rates.
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The ocean contains structures larger than mountain ranges.
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The Silk Road connected Asia and Europe for centuries.
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The Sahara Desert is roughly the same size as the continental United States.
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The CIA’s Phoenix Program operated during the Vietnam War.
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The lyrebird of Australia can mimic almost any sound — including chainsaws, camera shutters, and car alarms.
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The border between Belgium and the Netherlands runs through a bar in the town of Baarle-Hertog.
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