Science
Discover facts about science. Small discoveries that change the way you see familiar things.
Science
The sunlight you see is already eight minutes old
Sunlight takes about eight minutes to travel from the Sun’s surface to Earth, but that’s only the final leg. Energy made deep in the core repeatedly interacts…
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How a number can become a copyrighted key
The digits matter because software can treat a number as instructions for unlocking a program. If those instructions reveal the key, publishing the number may…
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Stainless steel can still turn rusty
Stainless steel’s defense is a microscopic film of chromium oxide. Chromium reacts with oxygen to build the thin shield, and a small scratch can expose fresh…
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Why pure gold is too soft for most jewelry
Pure gold is soft enough to scratch or bend more easily than most jewelry can handle. Jewelers mix in harder metals such as copper or silver to make it…
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The number Roman numerals couldn't write
Roman numerals had no symbol for zero because they didn’t use empty place-value slots. In 205, zero tells you the tens column is empty; Roman numerals build…
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Why A4 paper never gets distorted
A4 paper keeps its shape when halved because its long side is about 1.414 times its short side. Cut it across the middle and the new rectangle has that same…
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The berry that grows on a giant herb
A banana plant’s apparent trunk is really leaf bases wrapped tightly around one another, so the plant is an herb rather than a woody tree. Its fruit counts as…
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Storms sometimes make frogs and fish fall from the sky
The leading idea is that powerful winds, perhaps around a waterspout, can scoop small animals out of shallow water and carry them away. When the animals…
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A jiffy is an actual unit of time
The word “jiffy” can be precise, but only after you know the context. Some electrical fields use it for one alternating-current cycle, making it about 1/60 of…
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How one infinity can be bigger than another
Imagine listing every number between 0 and 1. Build another decimal by choosing each digit as 1 or 2, always different from the corresponding digit of the…
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A drop of ocean water can take 1,000 years to return
Cold and salty makes North Atlantic water dense, so it sinks and joins deep currents that flow across the ocean. Some of that water later rises in the…
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The lightning flash you see starts on the ground
The bright bolt is the return trip. First, a faint channel of charged air reaches down from the cloud; when it meets a streamer rising from the ground, a…
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Your shoes have billions of possible lacing patterns
Each time a lace crosses between eyelets, it can take another route. With enough eyelets, those choices stack up into billions of possible patterns—and each…
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The pirates who stole America's metric standards
A meter or kilogram only works as a shared unit if everyone can compare it with the same reference. Joseph Dombey reportedly carried prototype standards to…
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Some dinosaur feathers preserved clues to their color
Fossilized pigment-bearing structures called melanosomes can be compared with those in living animals. A 2010 study used them to infer reddish-brown bands on…
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A sloth's grip is much stronger than its sleepy image
Long claws and specialized limbs let sloths hang beneath branches for long periods. Their slow movement saves energy, while a powerful grip keeps them…
Discover moreOctopuses bypass slow evolutionary constraints by aggressively editing their messenger RNA on the fly, allowing them to rapidly alter their neural proteins to survive freezing…
Most animals adapt to changing environments over millions of years by slowly mutating their DNA. Octopuses, however, lack that kind of patience. When the…
Discover moreOxford scientists introduce deliberate chemical impurities into perovskite solar cell crystal lattices to strategically trap wandering electrons, paradoxically healing structural…
Silicon solar panels are getting a serious reality check from artificial crystals. Perovskite materials have a brilliant lattice structure for absorbing…
Discover moreSvante Pääbo proved Neanderthal bones aren't just contaminated rocks by identifying cytosine deamination, a degradation process where ancient DNA mutates into uracil, essentially…
Nothing screams 'authenticity' like molecular decay. When a creature dies, its DNA doesn't just sit there waiting patiently for a museum plaque; it…
Discover moreAtolla jellyfish employ a brilliant burglar alarm survival strategy where they flash blindingly bright bioluminescent light when attacked, intentionally summoning even larger…
In the pitch-black abyss of the deep ocean, drawing attention to yourself is generally a terrible idea. Unless, of course, you are an Atolla jellyfish trapped…
Discover moreResearchers at Pic du Midi proved that ocean microplastics launch into the troposphere and fiercely ride high-altitude jet streams across continents, effectively turning…
You’d think climbing an isolated mountain would get you away from city trash, but the atmosphere has other plans. Scientists sampling the air high up at the…
Discover moreAstronomers cracked the mystery of bizarrely toxic barium stars by realizing these giant glowing spheres secretly siphoned massive amounts of heavy radioactive elements from the…
It turns out even stars commit identity theft. Barium stars look suspiciously young and possess heavy elements that they are way too cold to have forged…
Discover moreResearchers recently engineered mind-bending photonic time crystals where the refractive index pulses rhythmically over time rather than space, forcing light waves passing…
Why respect the universe's speed limits when you can bend light with time itself? Traditional crystals have structures that repeat in physical space. But in…
Discover moreRed abalone sea snails meticulously construct their incredibly resilient nacre shells by stacking microscopic hexagonal calcium carbonate bricks between squishy layers of organic…
A squishy sea snail somehow manufactures better body armor than the Pentagon. If you look at chalk, it shatters easily because it's just pure, disorganized…
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