Science
331 concepts
Entropy, black holes, relativity — how the world actually works.
Economy
320 concepts
Interest rates, exchange rates, opportunity cost — the news, decoded.
Everyday
292 concepts
Dunning–Kruger, the Pareto principle — ideas worth knowing.
Tech
291 concepts
APIs, the cloud, AI — the tech you use daily, finally explained.
Long reads See all
The History of the Sewing Machine
The story of how the person who knew an entire garment from start to finish vanished
About 22 min readA History of Firefighting
Putting Out a Fire Saves the House Next Door Too—So Who Pays the Bill?
About 24 min readThe History of Hangul Character Encoding
Within two bytes, neither side could hold everything, and the assembly principles of the defeated side survived as rules in the next character set
About 22 min readHow about these today?
Transaction Utility Theory
It's the mental math that makes you buy a jacket you'll never wear, just for the thrill of 'I got it for 70% off!'
EconomyCodec
It's a magic compressor, like squeezing a bulky winter comforter into a vacuum storage bag, then opening the zipper later to bring it back to its fluffy self.
TechLens Flare
Think of it as light playing ping-pong inside your camera lens whenever you face a bright sun.
TechDelisting
It's like a store getting kicked out of a mall when something goes wrong. A stock that misses the standards gets pushed out of the trading market.
EconomyMoral Hazard
It's like running through the rain because you have a sturdy umbrella, and splashing everyone next to you.
EconomyThe Sapir-Whorf Hypothesis
Just as your drawing changes depending on whether you have a 12-pack or a 48-pack of colored pencils, the words you use shape the subtle contours of your thoughts.
EverydayConnection Timeout
Just like hanging up after letting the phone ring for a set number of times without an answer, it is the maximum time your device waits for a server to open the door.
TechLiving Fossil
Like creatures stepping straight out of a multimillion-year-old time capsule, they roam our modern Earth looking almost just as their ancient ancestors did.
ScienceHofstadter's Law
It's the sneaky habit of schedules: even a plan padded with extra time still runs late.
EverydayThe Texas Sharpshooter Fallacy
It's the mental illusion of firing a gun wildly at a wall, drawing a target around the tightest cluster of bullet holes, and then posing as a crack shot.
SciencePreferential Repayment Right in Korea
Like a government-issued queue ticket ensuring you get your rental deposit back before other creditors who registered later.
EverydayCircadian Rhythm
An internal 24-hour clock that wakes you up right on time without an alarm and makes you feel sleepy as night falls.
Science