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 10 of 34
What Did the Marshmallow Test Really Show?
Children who waited for a second marshmallow seemed to do better in life, and the study became a parable about willpower.
How Do Computers Store Images? Pixels, Bytes and Compression
A photo is a grid of numbers, three per dot. Why a phone picture would be 36 megabytes without compression, how JPEG throws detail away.
What Is the Epic of Gilgamesh? The Oldest Story We Have
Written on clay four thousand years ago, the epic follows a king who loses his friend and goes looking for a way not to die. The plot, the flood.
How Are Fossils Dated? Layers, Isotopes and Index Fossils
A fossil's age comes from the rock around it. Layers give the order, radioactive decay gives the numbers, and the two combine to date a bone.
How to Revise Maths Without Just Rereading Worked Examples
Reading a solution feels like learning and mostly is not. Attempt first, mix problem types, log your errors, and practise under exam conditions.
How Do Bees Communicate? The Waggle Dance Explained
A honeybee that finds flowers tells the hive where they are with a dance. How the waggle code works, how it was cracked, and what else bees say.
What Are the Main Branches of Christianity?
Catholic, Orthodox and Protestant, and the families within them. How two great splits produced the branches, what each holds, and where they overlap.
What Is a Logarithm? The Scale That Turns Multiplication Into Addition
A logarithm is the power a base must be raised to in order to give a number. Why that turns multiplying into adding, and where log scales hide in daily life.
How Is Ice Cream Made? Why It Stays Soft in a Freezer That Turns Water to Stone
Ice cream is a frozen foam of tiny ice crystals, fat, sugar syrup and air. How it is made, why the crystals must stay small, and what churning does.
How Does Bitcoin Work? A Ledger With No Bank Behind It
Bitcoin is a shared public ledger kept honest by cryptography and competition rather than a bank. How transactions are recorded, what mining is, and its limits.
How Was Photography Invented? From the Camera Obscura to the Sensor
Photography needed a way to fix the image a lens had projected for centuries. The chemists who found it in the 1830s, the rival processes, and the sensor.
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.
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.
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.
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.
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.
How Does Fire Work? The Chemistry of Combustion
Fire is a chain reaction between fuel and oxygen that makes its own heat. Why it needs three things to start, why the flame glows, and what the colours mean.
How Do Aeroplanes Fly? What Actually Holds a Wing Up
A wing stays up by pushing air down. Why the textbook explanation is wrong, what the angle of the wing does, and why a plane can fly upside down.
How Do Antibiotics Work, and Why Do Bacteria Stop Responding?
Antibiotics attack structures bacteria have and human cells do not. What the main kinds target, why they fail against viruses, and how resistance spreads.
What Is a Haiku? Seventeen Syllables and What Goes Into Them
A haiku is a three-line Japanese poem that catches one moment, usually in nature, with a turn in the middle.
How the Aztec Empire Rose and Fell in Under Two Centuries
The Mexica built a city on a lake, an empire of tribute across central Mexico, and a capital larger than any in Europe, then lost it all in two years.
How Do Animals See Colour? Dogs, Bees, Birds and the Mantis Shrimp
Colour vision depends on how many kinds of light-sensing cell an eye has. Why dogs see fewer colours than we do, why birds and bees see more.
How Do Appeals Work? What a Higher Court Can and Cannot Change
An appeal is not a second trial. Which mistakes a higher court will correct, why new evidence is rarely allowed, what the outcomes are.
Why Ice Floats When Almost Nothing Else Does
Most solids sink in their own liquid. Ice floats because water molecules lock into an open lattice as they freeze, with effects from icebergs to burst pipes.
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