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Ignoring infrastructure costs trillions
Economy

Ignoring infrastructure costs trillions

A tiny crack can be cheap to fix, but leaving it alone gives it time to grow. What could have been routine maintenance can become a much larger repair bill.

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Plymouth Rock has been chipped down by its own fame
Travel

Plymouth Rock has been chipped down by its own fame

The famous landmark is a modest, fractured boulder, not a monumental cliff. Over the years it was split, moved, and chipped for souvenirs. Visitors arrive…

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Why surgeons usually leave failed kidneys in place
Health

Why surgeons usually leave failed kidneys in place

Surgeons place the donor kidney low in the pelvis and connect it to the body’s circulation and bladder. Since the original kidneys can stay where they are,…

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Early typewriter ribbons were literally soaked in wet ink
Technology

Early typewriter ribbons were literally soaked in wet ink

Early typewriters used a fabric ribbon soaked in ink that had to be threaded through the machine—and could leave typists’ fingers stained.

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A rope bed needed tightening, just like an instrument
History

A rope bed needed tightening, just like an instrument

Instead of a modern spring base, a lattice of rope supported the bedding. As it stretched and sagged, tightening restored a firmer sleeping surface.…

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An electric car can make noise specifically for people outside it
Transport

An electric car can make noise specifically for people outside it

At low speeds, an electric drivetrain produces less of the engine sound pedestrians expect. An external warning sound makes the vehicle easier to notice, even…

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Indra's net is an infinite web of reflective nodes
Myths & mysteries

Indra's net is an infinite web of reflective nodes

In Hua-yen Buddhism, each jewel reflects every other one, making the net an image of how no person or action exists in isolation.

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FM radio signals die immediately behind obstacles
Technology

FM radio signals die immediately behind obstacles

FM signals generally travel by line of sight, so hills and buildings can weaken or block reception. They don't simply disappear the moment an obstacle gets in…

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Why groups wait for someone else to act
Science

Why groups wait for someone else to act

Imagine a group project where everyone gets credit whether they do the work or not. Each person has a reason to hang back and hope someone else contributes;…

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Why roundabouts make deadly crashes far less likely
Transport

Why roundabouts make deadly crashes far less likely

A roundabout replaces high-speed crossings with a curve that makes drivers slow down and travel in one direction. That cuts the chance of a car hitting…

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Why Instagram photos were once square
Technology

Why Instagram photos were once square

The square format was meant to evoke old-school instant cameras. Instagram kept it until 2015, when it began allowing other image shapes.

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Ephemerides accurately track exact sweeping celestial points
Myths & mysteries

Ephemerides accurately track exact sweeping celestial points

An ephemeris lists where celestial bodies are at specific times, giving astrologers planetary positions without requiring them to calculate each one from…

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How cave formations grow sideways
Science

How cave formations grow sideways

Helictites begin when water seeps through tiny channels and leaves minerals behind. Capillary forces and growing crystals can steer the deposit sideways,…

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Pectoralis major primarily forces internal arm rotation
Health

Pectoralis major primarily forces internal arm rotation

The pectoralis major spans the chest and attaches to the upper arm, so when it contracts it pulls that arm toward the torso and rotates it inward. Those…

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The bizarre dance ferrets do when excited
Science

The bizarre dance ferrets do when excited

An excited ferret may twist, hop, and crash around in what’s called the “weasel war dance.” It looks like a tiny fight scene, but it’s usually play or extra…

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Algol is notorious for causing intense physical danger
Myths & mysteries

Algol is notorious for causing intense physical danger

Astrology links Algol with danger and catastrophe, even blaming it for disasters like fires.

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Why a piano and guitar sound different on one note
Science

Why a piano and guitar sound different on one note

A note isn’t just one pitch; it comes with smaller overtones that give it its character. Piano strings are struck while guitar strings are plucked, so each…

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Dart flights stabilize trajectory like tiny wings
Economy

Dart flights stabilize trajectory like tiny wings

A dart’s fins do more than look like tiny wings: air resistance acts on them behind the dart, helping steer its point forward as it flies.

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