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 13 of 36
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.
How GPS Works: Satellites, Clocks and a Little Relativity
A phone finds itself by timing signals from satellites 20,000 kilometres up. Why it needs four, why the clocks allow for Einstein, and what limits accuracy.
Why Eggs Turn Solid When You Cook Them
Heat unfolds the proteins in an egg and tangles them into a solid mesh. The temperatures at which white and yolk set, and what that means for cooking.
How to Learn Vocabulary in a New Language So It Stays Learned
Which words to learn first, why spaced recall beats rereading, how to use the keyword trick without becoming dependent on it, and a daily routine that adds up.
How Cricket Scoring Works: Runs, Wickets, Overs and Formats
Runs, wickets, overs and extras, why a score like 245 for 6 makes sense, and how Test, one-day and T20 cricket differ. A guide for reading any scorecard.
What Was the Permian Extinction? The Day Life Nearly Ended
About 252 million years ago most species on Earth vanished in the worst extinction known. What caused it, how long recovery took, and what it says about carbon.
Why Do Cats Purr? What the Sound Means and How It Is Made
Cats purr when content, but also when injured, frightened or giving birth. How the sound is produced, what it signals, and the evidence on whether it heals.
How Echolocation Works: Seeing With Sound
Bats, dolphins and a few blind humans build a picture of the world from echoes. The physics of the calls, how the brain reads them, and the moths that jam them.
What Is the Hajj? The Pilgrimage to Mecca Explained
Two million people perform the same rites over five days each year. The Hajj step by step, where each ritual comes from, and how a crowd that size is managed.
What Is the Difference Between Sunni and Shia Islam?
The split began over who should lead after Muhammad. What the two branches share, where they differ, and why today's conflicts are mostly political.
What Is Habeas Corpus? The Right to Be Brought Before a Judge
The centuries-old court order that forces a jailer to justify a detention: where it came from, how it is used today, and when governments have suspended it.
How Voting Systems Change Election Results
The same votes can produce very different parliaments depending on the counting rule. First past the post, proportional, mixed and ranked systems compared.
Why Pluto Is No Longer Called a Planet
In 2006 astronomers finally defined the word planet, and Pluto did not fit. From its 1930 discovery to the rival world found in 2005 and the 2015 flyby.
How the Sun Makes Its Energy: Fusion at the Heart of a Star
The Sun is not burning. Deep in its core, hydrogen nuclei are fused into helium, and the small mass lost in each fusion is what lights the solar system.
Why Do We Cook Food?
What heat does to nutrients and safety, the theory that cooking shaped human evolution, and why raw is not always better.
What Is International Law?
Where it comes from without a world government, how it is enforced, and why it works better than critics expect.
Why Does Bread Go Stale?
Why does bread go stale? It is not simply drying out. Here is what starch retrogradation does, and why the fridge makes bread stale faster.
Where Does the English Language Come From?
Where does the English language come from? Its Germanic roots, the Norse and Norman layers, and why English vocabulary is such a mixture.
Why Do Languages Die?
The pressures that cause speakers to shift, how fast it is happening now, and what successful revival efforts have achieved.
How Does Anaesthetic Work?
The difference between local and general anaesthesia, what happens to consciousness, and why the mechanism is still not fully understood.
Why Do We Yawn?
The leading theories including brain cooling, why the oxygen explanation is wrong, and why yawning is so contagious.
What Is the Fibonacci Sequence?
How the pattern works, where it genuinely appears in nature, and which famous claims about it are overstated.
Who Built the Egyptian Pyramids?
The evidence for a paid, organised workforce, how the blocks were moved, and why the slave theory does not hold up.
What Is Dark Matter?
Why galaxies spin too fast to hold together, the evidence for invisible mass, and the honest state of the search.
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