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Some radio signals echo back 40 seconds later
Science

Some radio signals echo back 40 seconds later

A radio echo that takes 40 seconds to return has gone far beyond the quick bounce expected from ordinary reflections in the ionosphere. Such a delay would…

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How Jack Horkheimer turned astronomy into late-night camp
Culture & entertainment

How Jack Horkheimer turned astronomy into late-night camp

He hosted Star Hustler with a used-car-salesman's energy, pairing cosmic explainers with cheap green-screen effects and memorable catchphrases. His…

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How 29 reindeer became 6,000, then almost disappeared
Science

How 29 reindeer became 6,000, then almost disappeared

Introduced reindeer multiplied on Alaska's St. Matthew Island, where slow-growing lichens initially supplied abundant food. Heavy grazing depleted that…

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Why nuclear trains never made it to the tracks
Transport

Why nuclear trains never made it to the tracks

A nuclear reactor needs heavy shielding, cooling gear, and protection around its fuel. Put all that on a train and the power source starts eating the…

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A nuclear-war film won an Oscar while British TV kept it off air
Culture & entertainment

A nuclear-war film won an Oscar while British TV kept it off air

Peter Watkins made The War Game for the BBC in 1965, using a documentary style to portray a nuclear attack and its aftermath. The BBC withheld the broadcast,…

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An Ottoman traveler reported vampires fighting witches
History

An Ottoman traveler reported vampires fighting witches

Evliya Çelebi’s travelogue could move from useful observations about the Ottoman Empire to Russian vampires battling Circassian witches with uprooted trees.…

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Ships once listened for bells ringing underwater
Technology

Ships once listened for bells ringing underwater

Submarine signaling meant sound below the surface, not necessarily a submarine vessel. Bells installed beneath lightships or other navigation markers sent…

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Those glowing 1970s TV logos could be bent live on a screen
Culture & entertainment

Those glowing 1970s TV logos could be bent live on a screen

Scanimate manipulated analog video on a special CRT, letting operators stretch, rotate, and distort artwork in real time. A camera recorded the transformed…

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Typewriters could replay letters like player pianos
Technology

Typewriters could replay letters like player pianos

The Autotypist stored standard paragraphs as holes punched into paper rolls. Press a button, and air valves translated those holes into keystrokes on a…

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Thomas Manning reached Lhasa and still considered the trip a disappointment
Travel

Thomas Manning reached Lhasa and still considered the trip a disappointment

He met the young Ninth Dalai Lama in 1811 and recorded a deeply affecting encounter. But his larger ambition was to reach inland China, and he was sent back…

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Lightning can leave tree-like marks on your skin
Science

Lightning can leave tree-like marks on your skin

Lightning can damage tiny blood vessels near the skin’s surface, leaving branching marks called Lichtenberg figures. The vessels trace a fern-like pattern…

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Colonial hut taxes helped force people into cash work
Economy

Colonial hut taxes helped force people into cash work

In parts of colonial Africa, households faced taxes payable in money rather than the goods they produced. Obtaining that money could require work for colonial…

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The TV joke that made children rob their parents
Culture & entertainment

The TV joke that made children rob their parents

In 1965, Soupy Sales joked that children should take cash from their sleeping parents’ wallets and mail it to him. Some viewers actually did.

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Britain watched the Hajj for political ideas as well as disease
Travel

Britain watched the Hajj for political ideas as well as disease

Steamships and the Suez Canal brought more pilgrims together across the Red Sea and Indian Ocean. Late-nineteenth-century colonial officials worried both…

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Tiny balloons opened blocked arteries
Health

Tiny balloons opened blocked arteries

Instead of reaching a narrowed artery through open-heart surgery, doctors could thread in a thin catheter and inflate a tiny balloon at the blockage. The…

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Early television saved broadcasts by pointing a film camera at a screen
Culture & entertainment

Early television saved broadcasts by pointing a film camera at a screen

A kinescope recorded the picture from a television monitor onto motion-picture film. That gave live programs a physical copy that could be shipped, replayed,…

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Early desert pilots followed a line plowed in the sand
Travel

Early desert pilots followed a line plowed in the sand

On the RAF’s Cairo–Baghdad route in the 1920s, a furrow across the featureless desert helped crews navigate between landing grounds. From above, the ground…

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The controversial inventor who put sound in movies
Culture & entertainment

The controversial inventor who put sound in movies

He commercialized sound-on-film technology and brought synchronized sound to movies years before Hollywood adopted it, but the industry disliked him enough to…

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