The BrainSnail Blog
Small, practical ideas for learning more with less stress. Study tips, memory tricks and the science of slow and steady.
846 articles · page 9 of 36
How Does a Football League Work? Points, Promotion, Relegation and the Table
A football league is a round robin in which every club plays every other twice. How the points work, why goal difference matters, and what relegation does.
What Is a Virus? A Particle That Runs on Borrowed Cells
A virus is a package of genes in a protein coat with no metabolism of its own. How it hijacks a cell, why it is hard to call alive, and where viruses came from.
What Was the Russian Revolution? From Tsar to Soviet Power in One Year
In 1917 Russia went from absolute monarchy to the first communist state in eight months. Why the Tsar fell, how Lenin took power, and what came after.
What Is Gothic Architecture? Pointed Arches, Flying Buttresses and Walls of Light
Gothic is the style of the great medieval cathedrals, built from about 1140 to 1500. The three inventions behind it, and why its walls could be made of glass.
What Is Entropy? Why Things Fall Apart and Time Runs One Way
Entropy counts how many ways the parts of a system can be arranged without changing how it looks. Why it always rises, and why it gives time a direction.
What Is Nuclear Fission? Splitting the Atom and What Comes Out
Fission is the splitting of a heavy nucleus into two lighter ones, releasing energy and neutrons that split more. How it was found, and how a reactor tames it.
Why Is Glass Transparent? A Solid That Never Quite Froze
Glass lets light through because its electrons cannot absorb visible photons and its structure has no grain to scatter them. What glass is, and why sand is not.
How Do Mountains Form? Collision, Uplift and the Slow Work of Erosion
Mountains rise where the Earth's plates collide, pull apart or slide over hot spots, and they are worn down as fast as they grow. The four main ways they form.
Why Does Popcorn Pop? A Pressure Vessel the Size of a Seed
A popcorn kernel is a sealed shell around a starchy core. What happens at 180 degrees, why only one kind of corn does it, and why some kernels refuse to pop.
How Does a Piano Work? Hammers, Strings and the Trick of the Escapement
A piano is a harp struck by felt hammers that fly free of the key. What happens between finger and string, why it plays soft and loud, and what the pedals do.
How Does Bluetooth Work? Short-Range Radio That Hops Between Channels
Bluetooth links headphones, cars and watches over a few metres of radio. How devices pair, why the signal hops 1,600 times a second, and why the name is Viking.
What Is Occam's Razor? Why the Simpler Explanation Usually Wins
Occam's razor says not to multiply assumptions beyond what is needed. Who William of Ockham was, what the rule actually claims, and where it is misapplied.
What Is Confirmation Bias? Why We See What We Expect to See
Confirmation bias is the habit of seeking evidence that fits what we already believe. Where it comes from, how it is measured, and what curbs it.
How Does the Stock Market Work? Shares, Prices and What Moves Them
A share is a slice of a company, and the stock market is where slices change hands. Why companies sell them, how a price is set, and what an index measures.
What Is a Prime Number? The Atoms of Arithmetic
A prime number has exactly two divisors, itself and one. Why primes are the building blocks of arithmetic, how they are found, and why they guard bank cards.
What Is Etymology? Where Words Come From and How to Trace Them
Etymology is the history of words: where they came from and how their meanings changed. How it is done, what it shows, and the trap of folk etymology.
How Does Boxing Scoring Work? Rounds, Judges and the Ten-Point Must System
A boxing match is scored round by round by three judges on the ten-point must system. What they reward, how knockdowns count, and why decisions are disputed.
What Is the Story of Orpheus and Eurydice? A Song, a Descent and a Backward Glance
Orpheus sang his way into the underworld to bring back his wife and lost her with one glance. The myth, its early versions, and why the ending keeps changing.
Why Did the Woolly Mammoth Go Extinct? Climate, Hunters and the Last Island Herd
Mammoths survived several ice ages and then vanished, the last herd on an Arctic island 4,000 years ago. The evidence for climate, for hunting, and for both.
How Big Did Dinosaurs Get? The Sauropods and the Limits of Size
The largest sauropods weighed as much as ten elephants. How they grew so big, what their bodies had to solve, and why nothing on land has matched them since.
What Is Freedom of Speech? What It Protects and Where It Stops
Freedom of speech protects saying what others would rather you did not. Where the idea came from, what it covers, and the limits every legal system draws.
What Is Shinto? Japan's Way of the Spirits
Shinto is Japan's native tradition of kami, the spirits of places and things. Its shrines and rituals, its long history with Buddhism, and how it is practised.
How Does an Octopus Change Colour? Skin That Thinks for Itself
An octopus can match a rock in under a second without seeing colour. The pigment sacs in its skin, the nerves that drive them, and the puzzle of how it chooses.
How Do We Measure Distances in Space? Parallax, Cepheids and the Cosmic Ladder
Nobody has a tape measure to the stars. How parallax, Cepheid variables and exploding stars form a ladder of methods, each calibrated on the one below.
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