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How leapfrog can turn a game into a back injury
Games

How leapfrog can turn a game into a back injury

If the jumper misjudges the leap, their weight can land on the other person’s lower back.

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Why your gym clothes can stretch and snap back
Science

Why your gym clothes can stretch and snap back

Stretchy workout fabric gets its spring from elastane: its long molecules are coiled like tiny springs. Pull the cloth and the coils unspool; let go and they…

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When “bimbo” meant a brutish man
History

When “bimbo” meant a brutish man

Before it became an insult aimed at foolish women, “bimbo” described a brutish, intimidating man who relied on muscle over brains.

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How axe-throwing bars turn scrap wood into nightlife
Economy

How axe-throwing bars turn scrap wood into nightlife

The equipment is bargain-bin simple: construction lumber and axes from a hardware store. The bar charges groups premium prices for the chance to throw them at…

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Sliding down a giant magical rainbow
Transport

Sliding down a giant magical rainbow

Magic turns the rainbow into a solid, curved slide, and gravity does the rest, pulling riders down its arc. The colors offer excellent decoration; the laws of…

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Your body knows where your limbs are without looking
Psychology

Your body knows where your limbs are without looking

Your arm’s position is being reported from the inside. Receptors in muscles and joints send signals about how your body is moving, and your brain combines…

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Matterhorn bobsleds hide a secret basketball hoop
Culture & entertainment

Matterhorn bobsleds hide a secret basketball hoop

Employees installed a small basketball backboard in the hollow upper third of Disneyland’s Matterhorn as a break spot for climbers who scale the mountain.

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A handshake isn't a universal hello
History

A handshake isn't a universal hello

A greeting that feels friendly in one setting can feel overly familiar in another. Bows, curtsies, and handshakes signal different expectations about touch,…

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Carbon dating measures the radioactive decay of carbon-14
Technology

Carbon dating measures the radioactive decay of carbon-14

Living organisms continually take in carbon-14; after death, that intake stops and the isotope decays into nitrogen. Measuring how much remains helps estimate…

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Racing down steep playground chutes
Transport

Racing down steep playground chutes

The steeper the slide, the larger the downhill part of gravity’s pull, so riders pick up speed quickly. The plastic surface offers some resistance; it is not,…

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Municipal tap water uses chloramine for cheap disinfection
Technology

Municipal tap water uses chloramine for cheap disinfection

Treatment plants combine chlorine with ammonia to make chloramine, which lasts longer in pipes and helps protect water on its way to your tap.

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Ronald McDonald's original costume was pure nightmare fuel
Culture & entertainment

Ronald McDonald's original costume was pure nightmare fuel

His first costume used a cardboard tray as a hat, complete with a fake burger and fries, plus a paper cup strapped to his nose.

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Cheerleading uniforms update as fast as trends do
Economy

Cheerleading uniforms update as fast as trends do

A younger cheerleader may inherit a uniform that still fits, only to find the team has moved on to a new design. Frequent style updates make those…

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When barbers also performed surgery
Health

When barbers also performed surgery

Before medicine and barbering became separate trades, a barber's sharp razor was already a practical tool for procedures such as bloodletting and wound care.…

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The Lincoln Memorial once had a typo in stone
Travel

The Lincoln Memorial once had a typo in stone

An engraver carved an 'E' where an 'F' belonged; workers filled in part of the letter to correct the mistake.

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Why class rings disappear after graduation
Economy

Why class rings disappear after graduation

Students could buy oversized class rings right in the school cafeteria. After graduation, many stopped wearing them when the rings felt out of place in adult…

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Living E. coli can carry a video in its DNA
Technology

Living E. coli can carry a video in its DNA

Researchers encoded a video in the DNA of living E. coli, and the bacteria passed the data to their offspring—a squishy, self-replicating kind of storage.

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Vintage denim commands premiums for looking ruined
Economy

Vintage denim commands premiums for looking ruined

In the vintage market, the damage can be the selling point. Faded, worn jeans may cost more precisely because they look as if they survived a bear attack.

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