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Why British tanks were disguised as water tanks
History

Why British tanks were disguised as water tanks

To hide the new armored vehicles, British engineers described them as mobile water tanks bound for the desert. The cover name stuck, and “tank” outlasted the…

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The first pulsar was nicknamed Little Green Men
History

The first pulsar was nicknamed Little Green Men

The radio pulses were so regular that Jocelyn Bell Burnell’s team jokingly wondered whether they came from aliens, dubbing the signal LGM-1, for “Little Green…

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Why mourners once wore black to hide from ghosts
History

Why mourners once wore black to hide from ghosts

Black clothing was supposed to help mourners blend into the darkness so ghosts wouldn’t recognize them. Grief came with a dress code—and, in this case, a…

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Chinese opera costumes use sleeves as visual props
History

Chinese opera costumes use sleeves as visual props

The long silk sleeves let performers make emotions visible from a distance: a sharp flick can signal anger, while hiding the face can suggest shyness.

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Larry Walters flew a lawn chair into busy airspace
History

Larry Walters flew a lawn chair into busy airspace

In 1982, Walters attached helium-filled weather balloons to a patio chair and rose to about 16,000 feet near Los Angeles. He descended by releasing lift,…

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An anonymous princess became a queen's infamous quote
History

An anonymous princess became a queen's infamous quote

Rousseau's Confessions tells of an unnamed princess suggesting brioche when people had no bread. He wrote the passage while Marie Antoinette was still a child…

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Why Romans kept snakes in their homes
History

Why Romans kept snakes in their homes

Romans valued rat snakes because they ate rodents, and treated them as good-luck charms. The trade-off was a useful housemate that could still startle anyone…

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A Portuguese king sent the pope an elephant
History

A Portuguese king sent the pope an elephant

King Manuel I gave Hanno to Pope Leo X in 1514, bringing an extraordinary diplomatic gift to Rome. Transporting and displaying such an animal advertised…

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United States Capitol dome consists of solid cast iron
History

United States Capitol dome consists of solid cast iron

White paint gives the Capitol dome its marble look; underneath are 8.9 million pounds of cast iron. The marble effect is a very heavy illusion.

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When Columbus mistook manatees for mermaids
History

When Columbus mistook manatees for mermaids

His journal measured the animals against the mermaids he expected: he said they had masculine faces and were not half as beautiful as paintings. The real…

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Why vodka means “little water”
History

Why vodka means “little water”

“Voda” means “water” in Russian, and the diminutive suffix “-ka” makes vodka roughly “little water.”

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Before chimneys, houses vented smoke through the roof
History

Before chimneys, houses vented smoke through the roof

Before chimneys, a roof opening let hearth smoke escape, but it wasn’t enough to keep it off the room’s walls—or the people inside. The house had a vent, not…

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American researchers launched a chimpanzee into space
History

American researchers launched a chimpanzee into space

Researchers needed to know whether a trained passenger could still perform simple tasks in space. During his flight, Ham pulled levers as trained, showing he…

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A quarrel with King John shut down ordinary church life
History

A quarrel with King John shut down ordinary church life

In 1208, Pope Innocent III placed England under an interdict during a dispute over the archbishop of Canterbury. Most public religious services stopped,…

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Ancient Chinese cartographers painted maps on pure silk
History

Ancient Chinese cartographers painted maps on pure silk

Silk gave mapmakers a large surface for detailed charts that could be rolled up and carried. The map could be expansive without being a burden to bring along.

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Why an extradition treaty may not be enough
History

Why an extradition treaty may not be enough

An extradition treaty opens the door; it doesn’t force a country to send someone into a trial it considers unfair. Courts and governments can still refuse, so…

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A pope investigated an assassination plot involving wax figures
History

A pope investigated an assassination plot involving wax figures

In 1317, John XXII faced a conspiracy allegation involving poison and magical attacks on images made in his name. The accusation helped bring sorcery into a…

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How nickname got its extra n
History

How nickname got its extra n

The “n” shifted from “an” into the word itself: “an ekename” was heard as “a nekename,” eventually becoming “nickname.”

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