Science
Discover facts about science. Small discoveries that change the way you see familiar things.
Science
This bird kills snakes by stomping on their heads
A secretary bird keeps its face away from the snake and strikes down with its long, scaled legs. The tough covering helps guard against bites while the bird…
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Rolling resistance originates from structural bending
A rolling tire squashes slightly where it meets the road, then springs back as it rolls on. The tire doesn’t return all that bending energy as motion; some…
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A distant quasar contains 140 trillion Earth oceans of water
The water is vapor spread through an enormous region around an active black hole, not a liquid ocean orbiting in one piece. The black hole's feeding activity…
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Law of large aggregates guarantees predictable averages
Imagine tracking a game’s score over just a few rounds: one lucky win can dominate the average. Keep adding independent rounds under similar conditions, and…
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The liquid lakes hidden beneath miles of ice
At the bottom of a glacier, heat from Earth can melt ice where it meets the ground. The immense weight of the ice above presses on the water, helping it stay…
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Badgers rapidly excavate incredibly elaborate dirt dens
A badger’s home can be a whole underground neighborhood, not just one hole. Its tunnels may link several entrances, sleeping chambers, and passages that let…
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Raindrops look more like hamburger buns than tears
Surface tension tries to make a falling drop round, but air pressure pushes against its underside. A small drop stays ball-like; a larger, faster one gets…
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Halite serves as the formal geological term for rock salt
Halite is the mineral name for rock salt—and it can be the same sodium chloride as the salt on your fries. As salty water evaporates, sodium and chloride ions…
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Some tapeworms can live inside you for 30 years
A tapeworm doesn’t need its own stomach: it absorbs nutrients through its body surface from food its host has already digested. That lets some species persist…
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Heat flows exclusively from warmer to cooler objects
A cooler object does send energy to a warmer one, but the warmer object sends even more back. The difference is the net heat flow: energy moves toward the…
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Why some beliefs blame your bed for financial ruin
In some feng shui traditions, a bed facing a doorway is believed to let qi—often described as vital energy—become disrupted or depleted. That is the tradition…
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Eratosthenes sift finds primes by elimination
The sieve finds primes by crossing out numbers that are multiples of smaller primes. It can stop once it reaches the square root of its chosen limit: any…
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JavaScript's first prototype took just ten days
Brendan Eich created the initial version in 1995 so web pages could respond to users rather than merely display information. Decades of development followed…
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Why nitroglycerin is so dangerously unstable
A jolt can start nitroglycerin breaking down, and the reaction quickly creates hot gas. As that gas expands, it produces an explosion—so a small shock can set…
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How a moth jams a bat’s sonar
A bat sends out clicks and uses their echoes to pinpoint a moth. Some moths answer with clicks of their own, muddying the returning sound so the bat briefly…
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Tame foxes started looking like dogs
Breeders selected foxes for being less afraid of people, not for doglike looks. Yet after generations, some foxes also developed traits such as floppy ears…
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A thunderstorm can produce antimatter
Strong electric fields accelerate electrons, which can generate energetic gamma rays. Under the right conditions, those photons help create electron-positron…
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Molecular polarities prevent oil and water from ever mixing
Shaking oil and water breaks the oil into tiny droplets, making the bottle look mixed for a while. But water molecules don’t interact well with oil, so the…
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Penetrating gamma rays require thick concrete shields
Gamma rays don’t hit a shield and stop at a tidy line; they lose energy through interactions with the material. They can knock electrons loose or scatter off…
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Chocolate starts with fermenting piles of cocoa beans
Chocolate flavor begins taking shape while cocoa beans are still surrounded by bitter pulp. Yeasts and bacteria ferment that pulp, producing heat and acids…
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You may be only six acquaintances from anyone
Six introductions is a useful image for how connected social networks can be, not a guarantee that every stranger is exactly six steps away. Someone who…
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Psyche is a metal-rich asteroid, not a ready-made gold mine
Observations suggest a mixture of metal and rock rather than one solid exposed core. NASA's mission is designed to investigate what that unusual world is…
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Time is more than what clocks measure
A clock moving fast or sitting in stronger gravity ticks at a different rate than another clock. GPS depends on extremely precise timing, so its system…
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Why mirrors often look faintly green
An ordinary glass mirror reflects a little more green light than some other wavelengths. One reflection looks nearly colorless, but repeated reflections…
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