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Waiting for the marshmallow also means trusting the promise
Science

Waiting for the marshmallow also means trusting the promise

In an experiment, children waited longer after an adult had first demonstrated reliability. Taking the treat now can therefore reflect expectations about…

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Your memory can send you back in time
Science

Your memory can send you back in time

Episodic memory lets you revisit a particular scene from your past—where you were, what happened, and how it felt. But your brain rebuilds that scene from…

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Scotland's Black Dinner made an invitation into a trap
History

Scotland's Black Dinner made an invitation into a trap

In 1440, the young Earl of Douglas and his brother were executed after being invited to Edinburgh Castle. Later retellings add the ominous arrival of a black…

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The camera pill that photographs your intestines
Health

The camera pill that photographs your intestines

Inside the capsule are a camera and flashes; as it passes through the gut, they capture tens of thousands of pictures. Instead of steering a camera through…

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The actress who performed with bears and cougars
Culture & entertainment

The actress who performed with bears and cougars

Nell Shipman founded an independent production company in the wilderness and acted alongside bears and cougars. The cost of feeding the animals eventually…

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Early film editors wrestled with upright machines
Culture & entertainment

Early film editors wrestled with upright machines

Editors stood to operate the green Moviola with foot pedals, physically controlling the footage as it ran.

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An ice-pick-like tool reached the brain through the eye socket
Health

An ice-pick-like tool reached the brain through the eye socket

Walter Freeman promoted transorbital lobotomy, passing an instrument through the thin bone above the eye to cut connections in the frontal brain. The approach…

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The cruel study that tried to create stutters
Psychology

The cruel study that tried to create stutters

In the 1930s “Monster Study,” researchers tested whether harsh speech therapy could make children stutter. Some children at an orphanage were criticized and…

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Japan digs through 60 feet of snow each spring
Travel

Japan digs through 60 feet of snow each spring

At Japan's Tateyama Snow Corridor, crews reopen a mountain road by cutting through winter snow that can tower above visitors. The route becomes a narrow…

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One ship collision split Hobart's daily commute
Transport

One ship collision split Hobart's daily commute

In 1975, the bulk carrier Lake Illawarra struck the Tasman Bridge, bringing sections of the crossing down. People who had depended on a short route across the…

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When a Guidebook Told Tourists What to Admire
Travel

When a Guidebook Told Tourists What to Admire

The 19th-century Baedeker guides introduced star ratings for sights, and tourists became so devoted to them that they sometimes walked through Europe with…

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Harald Bode helped turn electronics into instruments
Technology

Harald Bode helped turn electronics into instruments

Bode developed electronic instruments and modular sound-processing equipment, including frequency shifters and vocoders. These devices let musicians reshape…

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We sent aliens a pixelated message in 1974
Technology

We sent aliens a pixelated message in 1974

The 1,679-bit Arecibo message, sent toward a star cluster 25,000 light-years away, encoded basic math, human DNA, and a pixelated human figure.

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The stolen star map that nearly vanished on the black market
History

The stolen star map that nearly vanished on the black market

Two metal detectorists found the 3,600-year-old Nebra Sky Disc in 1999 and tried to sell it on the black market. A police sting in a Swiss bar recovered it;…

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This Swiss railway climbs a 48% slope by gripping teeth
Transport

This Swiss railway climbs a 48% slope by gripping teeth

The Pilatus railway gains up to 48 meters in height for every 100 meters measured horizontally. Cogwheels engage a toothed rack, overcoming the limits of…

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Cholera fears put returning pilgrims into quarantine near Suez
Travel

Cholera fears put returning pilgrims into quarantine near Suez

An 1891 public-health report described Egyptian measures after an outbreak in Mecca: sea travelers were to spend 21 days under observation at El Tor, while…

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The medical student who discovered heparin by accident
Health

The medical student who discovered heparin by accident

In 1916, Jay McLean was looking for pro-coagulants—substances that help blood clot—in canine liver tissue. Instead, the medical student isolated heparin,…

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A stalled train turned an Italian tunnel into a gas trap
Transport

A stalled train turned an Italian tunnel into a gas trap

In the 1944 Balvano disaster, a heavily loaded train became stuck in a tunnel while its steam locomotives produced carbon monoxide. Poor ventilation let the…

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