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The earthquake’s real center is underground
Science

The earthquake’s real center is underground

Think of an earthquake as a tear that starts below ground and then travels along a fault. The starting point is the hypocenter, and the epicenter is its…

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Why tantalum can stay inside the human body
Science

Why tantalum can stay inside the human body

Tantalum quickly grows a thin oxide layer when exposed to air or bodily fluids. That stable coating acts like a shield, keeping corrosive fluids from…

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Fumaroles constantly vent superheated sulfurous steam
Science

Fumaroles constantly vent superheated sulfurous steam

Water underground meets hot rock, heats up, and escapes through cracks as steam and gas. Some vents carry hydrogen sulfide, the gas behind rotten eggs’…

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San Andreas fault is a giant transform boundary
Science

San Andreas fault is a giant transform boundary

Where the San Andreas fault is locked, the plates keep trying to slide past each other even though the surface appears still. Their motion bends and strains…

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Modern lasers mostly function as intensely focused light
Science

Modern lasers mostly function as intensely focused light

In a laser, one photon can make an excited atom emit another photon just like it. As more matching photons are produced, their waves travel in step and stay…

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Friction forcefully resists sliding between surfaces
Science

Friction forcefully resists sliding between surfaces

Even surfaces that look smooth have tiny bumps. As they slide, those high spots catch, stick, and bend against one another, resisting motion as friction. At…

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Solfeggio frequencies are sold as miracle cures
Science

Solfeggio frequencies are sold as miracle cures

A calming tone can help you relax, but that doesn’t mean a special frequency is treating your skin or aligning your body. The specific healing claims made for…

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Sunlight can push on solid objects
Science

Sunlight can push on solid objects

Light may have no weight you can feel, but it does carry momentum. When photons bounce off a spacecraft’s reflective sail, they transfer some of that momentum…

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Schmidt realized quasars were incredibly far away
Science

Schmidt realized quasars were incredibly far away

A quasar looked like a tiny point of light, but its spectrum gave it away. Maarten Schmidt matched its shifted lines to hydrogen and realized the light had…

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Talc officially sits at the absolute bottom of Mohs scale
Science

Talc officially sits at the absolute bottom of Mohs scale

Talc sits at the softest end of the Mohs scale: a fingernail can scratch it, and it can be ground into powder. The scale ranks minerals by which can scratch…

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A bed bug changes shape when it feeds
Science

A bed bug changes shape when it feeds

An unfed adult is relatively flat and oval. After a blood meal it becomes more elongated, swollen and reddish-brown. That changing silhouette is one reason a…

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Law of Assumption states reality is subjective
Science

Law of Assumption states reality is subjective

Imagining success can change what you notice and what you do, but it doesn’t make reality obey your thoughts. Expecting an opportunity may help you spot it or…

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Accumulated volcanic ash chemically cements into rock
Science

Accumulated volcanic ash chemically cements into rock

Tuff starts as loose volcanic ash and fragments. Water carries minerals into the gaps between the grains; as the layers press together, those minerals harden…

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Why raccoons wash even dry food
Science

Why raccoons wash even dry food

A raccoon dunking dry food may be using water to feel it better, not to clean it. Its front paws are packed with touch receptors, and water may make the…

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John Napier invented logarithms to simplify calculations
Science

John Napier invented logarithms to simplify calculations

Napier’s trick was to turn a hard operation into an easier one: multiplying became adding. Find the logarithm of each number in a table, add those two…

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Halley realized the same large comet kept returning
Science

Halley realized the same large comet kept returning

Halley compared records of comets seen in different years and noticed their paths matched. He calculated when the returning comet should appear next, in 1758,…

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Python was named after Monty Python's comedy troupe
Science

Python was named after Monty Python's comedy troupe

Python got its name from the comedy troupe, not the snake: Guido van Rossum was reading Monty Python scripts when he chose it. The joke still pops up in code…

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The sound that supposedly makes people lose control
Science

The sound that supposedly makes people lose control

Infrasound is simply sound below the range human ears can hear. That label describes a frequency, not a secret button that takes control of the body; the…

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