The BrainSnail Blog
Small, practical ideas for learning more with less stress. Study tips, memory tricks and the science of slow and steady.
797 articles · page 6 of 34
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 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 the Story of Prometheus? Fire, Punishment and the Gift to Humanity
Prometheus stole fire from the gods, gave it to humans and paid with an eagle at his liver. The myth in Hesiod and Aeschylus, and what it came to mean.
What Is the Prisoner's Dilemma? Why Rational People Fail to Cooperate
Two suspects, each better off confessing whatever the other does, both end up worse than if they had stayed silent.
What Is a Neutron Star? A Sun Squeezed Into a City
A neutron star packs more than the Sun's mass into a ball twenty kilometres across. How it forms, what its matter is like.
What Is the Difference Between Rugby Union and Rugby League?
Two sports with one ancestor and a split in 1895 over paying players. Fifteen against thirteen, rucks against tackle counts.
What Are Prisons For? Four Answers That Pull in Different Directions
Retribution, deterrence, incapacitation and rehabilitation recommend different sentences, which is why penal policy is incoherent in nearly every country.
How Does a Guitar Make Sound? Strings, Bodies and Pickups
A plucked string on its own is nearly silent; the guitar is what makes it heard. How the string sets the pitch, how the body amplifies it, and pickups.
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.
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.
Who Were the Neanderthals? Our Closest Relatives and What Became of Them
Neanderthals lived across Europe and western Asia for 350,000 years before vanishing. What they were like, how they lived, and why most of us carry their genes.
What Is Taoism? The Way, Effortless Action and the Tao Te Ching
Taoism is the Chinese tradition of living in accord with the Tao, the way of nature. Its founding text, wu wei, and how a philosophy became a religion.
What Is Imposter Syndrome? Feeling Like a Fraud When the Evidence Says Otherwise
Imposter syndrome is the persistent belief that your success is undeserved. Where the term came from, who reports it, what keeps it going, and what helps.
What Is Pi and Why Does It Turn Up Everywhere?
Pi is the ratio of a circle's circumference to its diameter, about 3.14159, and it goes on forever without repeating.
What Is Satire? Ridicule With a Purpose, From Swift to the Present
Satire attacks folly and vice by making them look ridiculous. How it differs from parody, the tools it uses, and why it gets mistaken for the real thing.
How Did Dinosaurs Reproduce? Eggs, Nests and the Evidence for Parents
Every dinosaur hatched from an egg, and fossil nests, embryos and brooding adults show how. What the eggs were like, who brooded, and how fast the young grew.
What Is Sculpture? Carving, Modelling, Casting and Assembling in Three Dimensions
Sculpture is art that occupies space rather than picturing it. The four ways of making it, the materials each suits, and how the form left the human figure.
What Were the Crusades? Two Centuries of Holy War Explained
The Crusades were wars from 1095 to 1291 in which European Christians tried to seize and hold Jerusalem. Why they began, what happened, and what they left.
How Do Wolf Packs Work? The Family Behind the Myth of the Alpha
A wolf pack is a family, two parents and their young, not a hierarchy won by fighting. Where the alpha idea came from, and how packs really hunt.
What Is the Jet Stream? The River of Wind That Steers the Weather
The jet stream is a band of wind ten kilometres up that drives storms across the continents. Why it exists, how it bends, and what happens when it stalls.
How Does a Transistor Work? The Switch That Built the Modern World
A transistor is a switch with no moving parts, turned on and off by a voltage. How a slice of silicon controls current, and why that lets it compute.
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.
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.
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.
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