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Why jetboards sink when they stop moving
Transport

Why jetboards sink when they stop moving

A hydrofoil beneath the board lifts it above the water as it moves; the flowing water over the foil supplies the lift. Stop the board and that lift…

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Anamorphic street art only looks correct from extreme angles
Culture & entertainment

Anamorphic street art only looks correct from extreme angles

Artists distort the image so it resolves into a 3D scene from one chosen viewpoint; from elsewhere, the drawing looks stretched and smeared.

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Astronomers theorize the Star of Bethlehem was just a rare astrological conjunction of Venus and Jupiter
Myths & mysteries

Astronomers theorize the Star of Bethlehem was just a rare astrological conjunction of Venus and Jupiter

One proposed explanation is a close conjunction in 2 BC: Venus and Jupiter appeared to merge in the sky, creating an unusually bright sight. The idea remains…

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Respected psychiatrist Ian Stevenson spent forty years interviewing toddlers who claimed they died in horrible ways
Myths & mysteries

Respected psychiatrist Ian Stevenson spent forty years interviewing toddlers who claimed they died in horrible ways

Stevenson collected thousands of reports and checked children’s specific claims against details about deceased people, though the accounts did not prove…

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Furious 7 really dropped cars out of a plane
Culture & entertainment

Furious 7 really dropped cars out of a plane

The production sent unmanned cars into free fall with parachutes, with skydiving camera operators filming the descent. Separate shots put the actors inside…

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Ancient Mesopotamians literally carved the very first recorded horoscopes onto heavy clay tablets around 410 BC
Myths & mysteries

Ancient Mesopotamians literally carved the very first recorded horoscopes onto heavy clay tablets around 410 BC

The earliest known personal examples were pressed into cuneiform clay in Babylon; rather than offering career advice, they warned whether a child was destined…

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Slurping noodles isn't a table-manners scandal in Japan
Travel

Slurping noodles isn't a table-manners scandal in Japan

It is an accepted way to eat dishes such as ramen and soba, rather than the automatic breach of etiquette it can be elsewhere. Drawing in air also changes the…

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Talcum powder physically absorbs friction between skin folds
Health

Talcum powder physically absorbs friction between skin folds

Fine powder particles settle between damp skin folds and reduce direct skin-on-skin contact. That makes them a dry lubricant: they help the surfaces slide…

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Why Brazil restricts travel to protect uncontacted tribes
Travel

Why Brazil restricts travel to protect uncontacted tribes

FUNAI patrols parts of the Amazon to keep loggers, missionaries, and tourists away because outsiders can bring diseases that isolated communities have little…

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Free radicals are cellular wrecking balls
Health

Free radicals are cellular wrecking balls

A free radical can take an electron from a nearby molecule, leaving that molecule more likely to react in turn. This chain of oxidative reactions can damage…

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Why the Ace of Spades is so ornate
Economy

Why the Ace of Spades is so ornate

The fancy design wasn’t just decoration: English authorities required a stamp showing the playing-card tax had been paid. Manufacturers put it on the top…

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Why intense envy can feel physically painful
Psychology

Why intense envy can feel physically painful

Watching someone else get what you desperately want can feel like a punch. Envy makes a comparison personal: their success becomes evidence of the gap between…

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Arabic parts use complex fractional math to calculate incredibly specific things like sudden wealth
Myths & mysteries

Arabic parts use complex fractional math to calculate incredibly specific things like sudden wealth

Astrologers calculate a Lot by adding and subtracting the degrees of three chart points; the Part of Fortune is the best-known example, associated with luck.

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Cardinal signs initiate the four seasons and use this astrological fact to justify being highly bossy
Myths & mysteries

Cardinal signs initiate the four seasons and use this astrological fact to justify being highly bossy

Aries, Cancer, Libra, and Capricorn mark the starts of spring, summer, fall, and winter in the zodiac, which is why astrology calls them “initiating” signs.

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Indian Ocean is the warmest body of water globally
Travel

Indian Ocean is the warmest body of water globally

It absorbs heat so effectively that its water can feel like a vast, warm bathtub.

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Expedited passport processing is completely unpredictable
Travel

Expedited passport processing is completely unpredictable

Paying for expedited processing doesn’t guarantee a faster arrival: bureaucratic delays can leave a rushed passport arriving no sooner than a standard one.

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Brazil borders almost every country in South America
Travel

Brazil borders almost every country in South America

Brazil shares land borders with every South American country except two, making it the continent's near-ubiquitous neighbor.

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A suffragette slashed one of London's most famous paintings
History

A suffragette slashed one of London's most famous paintings

In 1914, Mary Richardson attacked Velázquez's Rokeby Venus at the National Gallery in protest over the treatment of Emmeline Pankhurst. The museum closed to…

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Stardew Valley's Abigail talks about eating gifts that aren't food
Games

Stardew Valley's Abigail talks about eating gifts that aren't food

Her generic response to liked gifts says she was hungry and calls the present delicious. That includes objects such as quartz, helping produce the running…

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Why the Zerg sound like wet squishes
Games

Why the Zerg sound like wet squishes

The Zerg issue commands in gurgles, hisses, and squelches instead of words, so a match can sound like a bowl of macaroni being stirred.

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Palmistry became wildly popular in the nineteenth century because it gave aristocrats an excuse to touch hands
Myths & mysteries

Palmistry became wildly popular in the nineteenth century because it gave aristocrats an excuse to touch hands

Palm readers could turn a fortune-telling session into a socially acceptable excuse to hold a debutante’s hand, sometimes flattering her with claims about an…

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Why scientists can barely gather francium
Science

Why scientists can barely gather francium

Francium is hard to collect because it decays almost as soon as it is made. Even its longest-lived known isotope loses half its atoms in about 22 minutes, so…

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Why eucalyptus trees can burst into flames
Science

Why eucalyptus trees can burst into flames

Some eucalyptus leaves contain volatile oils that can add fuel when a fire is already burning. They don't make a tree ignite by themselves; the oils can help…

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Ninth house rules foreign travel and higher education
Myths & mysteries

Ninth house rules foreign travel and higher education

In astrological readings, it can point to relocating abroad or pursuing higher education—sometimes at the cost of student debt.

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