Q0966'Decimate' comes from a brutal Roman punishment: executing one in every ten soldiers.
Today it loosely means 'to devastate', but its root is the Latin for a tenth. The original was a literal, grim arithmetic.
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Q0966Q0967'Sarcasm' comes from a Greek word meaning to tear flesh — fitting for a biting remark.
The vivid image captures how a cutting comment is meant to wound. Language often hides such violent origins in everyday words.
Q0968'Hello' only became a common greeting with the spread of the telephone.
Edison is said to have championed 'hello' as the way to answer a call, over Bell's preferred 'ahoy'. The phone reshaped how we greet each other.
Q0969YouTube's first-ever video, uploaded in 2005, is a 19-second clip called 'Me at the zoo'.
Filmed in front of the elephants, it was posted by a co-founder. From that humble clip grew the world's biggest video platform.
Q0970'Creeper', made in 1971, is often called the first computer virus — a harmless experiment that simply displayed a message.
It hopped between early networked machines printing 'I'm the creeper, catch me if you can'. A program called 'Reaper' was written to remove it.
Q0971The tech giant Nokia started in 1865 as a riverside pulp and paper mill in Finland.
Over time it made rubber boots and cables before moving into electronics and phones. Few companies have reinvented themselves so completely.
Q0972Year after year, analyses find that simple strings like '123456' remain among the most common passwords.
Reusing easy passwords is one of the biggest everyday security risks. A long, unique passphrase or a password manager helps far more than complexity rules.
Q0973A life lived without reflection, Socrates suggested, is barely worth living at all.
In Plato's Apology, Socrates says this while on trial in Athens in 399 BC, accused of impiety and corrupting the young. He refuses to stop questioning, arguing that self-examination is not a hobby but the condition of a genuinely human life.
Q0974The Stoic practice of 'premeditatio malorum' means calmly imagining setbacks in advance.
Far from pessimism, it's meant to lessen fear and increase gratitude — if you've already faced a loss in your mind, it shocks you less in life.
Q0975Plato argued that beyond the imperfect things we see lie perfect, eternal ideals — his 'theory of forms'.
A real circle is always slightly flawed, yet we grasp the idea of a perfect circle. For Plato, those ideals were more real than the physical world.
Q0977Jean-Paul Sartre declined the 1964 Nobel Prize in Literature.
He said a writer should not let himself be turned into an institution, and refused all official honours. The committee awarded it anyway.
Q0978Samuel Johnson's 1755 Dictionary of the English Language was largely the work of one person, a remarkable act of literary organisation.
Modern dictionaries are usually institutional projects, but Johnson's leaned heavily on one man's reading, definitions and chosen quotations. It didn't freeze English so much as shape how people understood it — a reminder that order itself can be a creative act.
Q0979In 1926 Agatha Christie disappeared for 11 days, sparking a nationwide search; she was found at a hotel.
She never fully explained it, and the episode remains one of literature's real-life mysteries — fitting for the queen of crime.
Q0980Smell is wired unusually close to memory and emotion circuits, which is why one scent can reopen a whole place or year.
Olfactory signals connect strongly with brain regions involved in emotion and memory. That is why a kitchen, perfume, rain or hospital smell can feel immediate before you find words for it. This matters across cultures because scent carries home, danger, grief and comfort. The lesson: memory is not only visual; it can arrive through the air.
Q0981Laughter can lower stress signals and briefly relax the body, making it a small physical event as well as a social one.
A laugh changes breathing, muscle tension and social connection for a moment. It is not medicine for every problem, but it can interrupt stress and create relief. This matters globally because humour is one of the cheapest shared regulators humans have. The lesson: lightness can be physiological, not only emotional.
Q0982The human eye can distinguish on the order of a million colours, depending on light, context and the person seeing them.
Colour perception comes from cone cells, brain processing and comparison with surrounding light. We have far fewer colour words than colour differences we can notice. This matters in art, design, safety signs and screens around the world. The so-what: seeing is measurement and interpretation at once.
Q0983Bone can be remarkably strong for its weight, combining mineral hardness with living structure rather than behaving like dead steel.
The popular 'stronger than steel' comparison depends on the type of force and how strength is measured, so it is safer to say bone is impressively strong for its weight. It also repairs and remodels itself, which steel cannot do. This matters for ageing, training and injury. The lesson: biological materials win by combining strength with renewal.
Q0985The bystander effect is the tendency for people to be less likely to help when others are present and responsibility feels diffused.
When many people witness a problem, each may assume someone else will act or understand the situation better. The effect is not automatic, but it is strong enough to matter in emergencies and public spaces. Help often begins when responsibility stops floating and lands on one person.
Q0986The Pygmalion effect: higher expectations placed on people tend to improve how they actually perform.
Belief shapes behaviour — teachers and leaders who expect more often, subtly and unconsciously, draw more out of people.
Q0987The 'frequency illusion' is when a thing you just noticed suddenly seems to appear constantly.
Nothing has actually changed — your brain has simply started filtering for it. Also called the Baader–Meinhof phenomenon.
Q0988At water's triple point, solid, liquid and vapour can coexist in equilibrium under one precise temperature and pressure.
The triple point is not everyday boiling or freezing; it is a precise laboratory condition where three phases meet. It shows that states of matter depend on pressure as well as temperature. This matters in physics, calibration and engineering. The lesson: simple substances can have exact hidden thresholds.
Q0991Lightning hits the Earth on the order of several million times every day.
Roughly a hundred bolts flash somewhere on the planet every second, each superheating the air to several times the temperature of the Sun's surface.
Q0992The human genome contains about 3 billion base pairs of DNA.
Written out, that genetic code would fill many thousands of books — yet it fits inside the nucleus of nearly every cell in your body.
Q0993Ordinary glass is made by melting silica-rich sand at very high temperatures, then cooling it into an amorphous solid.
Glassmaking turns common minerals into a transparent material that can become windows, lenses, bottles, screens and fibre optics. The process depends on heat, additives and careful cooling. This matters globally because glass changed homes, science, medicine and communication. The lesson: civilisation often begins by changing what a material can do.