Science
Discover facts about science. Small discoveries that change the way you see familiar things.
Science
Korean festival Chuseok involves eating half moon rice cakes
Songpyeon, the half-moon rice cakes eaten during Chuseok, are often steamed over pine needles. The needles add a subtle aroma and help keep the cakes from…
Discover more
A Japanese tea ceremony can last four hours
A formal Japanese tea gathering can take hours because the tea is only one part of the event. Guests may share a meal, pause between stages, and be served…
Discover more
Could a low rumble be mistaken for a haunting
A very low rumble may be too deep to hear clearly but still strong enough to make your body or nearby objects vibrate. That unfamiliar sensation can feel…
Discover more
Indian cuisine relies heavily on ghee for high heat cooking
Ghee handles high heat better than ordinary butter because making it removes most of the water and milk solids that scorch first. The result still tastes…
Discover more
Pulling your arms in makes you spin significantly faster
Pulling your arms in moves mass closer to your spin axis, so your body has less resistance to turning. Because its angular momentum stays the same, your…
Discover more
Traditional Korean Ondol architecture warms floors directly
A fire could go out, but the warmth under an ondol floor kept coming. Hot smoke traveled through passages beneath the masonry, which soaked up heat and then…
Discover more
STACKY FOR IPHONEA bigger world.
One discovery
at a time.
Keep discovering with Stacky. Interesting facts in an app that is always within reach.
A treatment can win in both groups and lose when they're combined
Imagine treatment A works better than B for both mild and severe cases, but A is given mostly to severely ill patients. Its overall success rate can still be…
Discover more
Even mathematics cannot comb a hairy ball flat
Imagine an arrow lying flat at every point on a sphere, with neighboring arrows changing direction smoothly. The hairy ball theorem says they cannot all…
Discover more
Epigenetics alter gene expression without touching pure DNA
A cell can change which genes it uses without changing the DNA letters themselves. Epigenetic marks affect how tightly DNA is packaged, making some stretches…
Discover more
Would you try ice-cold noodles for dessert
Faludeh gets its unusual texture from soft noodles suspended in partly frozen rosewater syrup. A squeeze of citrus cuts through the floral sweetness, so one…
Discover more
Cellular memory dictates highly specific tissue development
Cells read changing patterns of genes and chemical signals as clues to where they are in the body. Those molecular directions help a cell maintain the right…
Discover more
Arrow's impossibility theorem ruins fair voting systems
A group’s preferences can chase their own tails: a majority picks A over B, B over C, then C over A. Arrow’s theorem says that for three or more options, no…
Discover more
How an infinite hotel finds room for one more guest
The trick is to move every guest one room higher: room 1 to 2, room 2 to 3, and so on. Each person still gets a room, while room 1 opens up—even though the…
Discover more
Gödel showed that math has unprovable truths
Imagine a rulebook for proving number facts. Gödel showed that, if the system meets certain conditions, there are true statements it cannot prove using that…
Discover more
Your eyes can get sunburned too
Too much ultraviolet light can inflame the cornea, the clear layer at the front of the eye. The damage may not hurt right away; hours later, your eyes can…
Discover more
Your retina is brain tissue facing the outside world
The retina is part of the central nervous system, not just a passive camera sensor. Its cells turn light into electrical signals and begin processing…
Discover more
Center of mass entirely dictates if an object tips over
An object tips when gravity’s downward pull acts outside the area holding it up. Picture a plumb line dropping from its center of mass: if the line lands…
Discover more
The Japanese garden trick that borrows a mountain
A gate or a few plants can act like a picture frame around a distant mountain. Your eye links the view beyond the garden with the carefully arranged space in…
Discover more
Propulsion relies entirely on tossing mass backwards
A rocket pushes forward by throwing hot exhaust backward. The exhaust carries momentum one way, so the rocket gains momentum the other way; it doesn't need…
Discover more
Why four colors are enough for any flat map
A flat map can always be colored with four colors so neighboring regions differ. The key is that two regions count as neighbors only if they share a border;…
Discover more
Euler's identity puts five famous constants on one line
Euler's formula describes motion around the unit circle using e raised to an imaginary angle. At an angle of π radians, the point has traveled halfway around…
Discover more
Why one guitar string makes many frequencies
Pluck a guitar string and you start several overlapping vibrations: one across its full length, others across shorter sections. The shorter waves add higher…
Discover more
Genetic recombination shuffles DNA during reproduction
Meiosis doesn't just pass chromosomes along; matching chromosomes can exchange corresponding DNA stretches first. Each resulting egg or sperm can carry a new…
Discover more
How a hidden trait can reappear generations later
Two parents can carry a recessive variant without expressing the trait themselves. If a child gets that variant from both, the trait can appear; with two…
Discover more