Science
Discover facts about science. Small discoveries that change the way you see familiar things.
Science
Behaving exactly opposite to your actual feelings
If a little boy throws rocks at you, he doesn't like you—he is just violent. But in adult psychology, reaction formation is a defense mechanism where a person…
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Nanosecond represents exactly one billionth of a second
Humans invented a word for a unit of time so infinitely short that you will literally never be able to experience it. Light itself only travels about one foot…
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A medieval moment lasted 90 seconds
If someone asks for a moment of your time, you are legally allowed to walk away after a minute and a half. Medieval timekeepers divided the solar hour into…
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Viewing the entire world in strict polar extremes
Nuance is completely off the table. Common in borderline personality disorder, splitting is a defense mechanism where a person fails to bring together…
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Thermal imaging cameras detect heat signatures in darkness
Because everything emits thermal radiation, these cameras entirely ignore the visible spectrum and just map out temperature differences. A completely…
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How friction can weld metal without a torch
Instead of using a blowtorch to carefully melt two metal pipes together, engineers sometimes just spin one pipe incredibly fast and forcefully slam it into…
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Why global time is called UTC
When standardizing global time, English speakers wanted CUT, and French speakers demanded TUC. Instead of acting like adults, they compromised on UTC, an…
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The heatproof paste whose secret died with its inventor
An amateur inventor created a paste that could withstand a nuclear blast without transferring heat. He literally painted an egg with it, blasted it with a…
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Doomsday clock measures proximity to global catastrophe
Instead of measuring anything useful, a group of highly anxious experts updates a symbolic clock every year to show how close humanity is to totally…
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Batteries convert stored potential energy into electricity
A battery does not actually store raw electricity; it stores chemical potential that desperately wants to balance itself out. The moment you connect a…
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The kilogram used to live in a vault
Imagine guarding a lump of metal with your life just so the world knows how much a sack of potatoes weighs. Until recently, the definition of a kilogram was…
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Why wind turbines slow down in strong winds
You would assume a violently spinning wind turbine is generating peak power, but they actually have to hit the brakes during major storms. If they spin too…
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The year Sweden had a February 30
In 1712, Sweden completely botched their transition from the Julian calendar to the Gregorian one, skipping leap days irregularly. Realizing their calendar…
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Birch trees droop while you sleep
It seems humans aren't the only ones completely exhausted by the simple act of existing all day. Scientists using laser scanners discovered that trees have…
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Mass remains identically constant wherever you go in space
Your weight fluctuates wildly depending on whatever local gravity field you inhabit, but mass is stubbornly absolute. It strictly measures exactly how much…
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Stationary objects require aggressive force to start moving
Inertia guarantees that resting masses are incredibly lazy. An object completely at rest will happily sit perfectly still until the end of time unless an…
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Squeezing trapped gas abruptly spikes its internal pressure
If you severely shrink the available volume of a sealed gas, you are forcefully packing the same chaotic molecules into a tragically small space. They start…
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Pulling your arms inward forces you to spin much faster
Conserving angular momentum is incredibly strict. If a spinning mass suddenly compacts itself into a smaller radius, it is completely forbidden from slowing…
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Why a dropped spring's bottom hangs in midair
Physics sometimes looks like terrible CGI. If you hold a long stretched spring by the top and let go, the bottom section will literally hover in mid-air…
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Perfect black bodies theoretically swallow all radiation
In absolute theoretical physics, a perfect black body is a ruthless entity that absorbs literally every single frequency of incoming radiation without…
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Rolling objects lose drastically less momentum than sliding
Wheels are considered brilliant purely because they cheat friction. Instead of aggressively dragging two rough surfaces across one another and losing…
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Your center of mass can float in empty space
The exact balance point of a solid object does not actually need to reside inside the physical material. If you perfectly balance a heavy solid ring, its…
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Two bright lights can create darkness
When two perfect light waves crash into each other, they don't necessarily get brighter. If the peak of one precisely hits the trough of another, they…
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Mirages are simply bent light hovering over very hot ground
That shimmering puddle on a hot road is a complete lie. The aggressively heated air near the asphalt bends light from the sky perfectly upward before it hits…
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