Intellect PlusInventions
983 cards. Each one is a 40-second story with a five-minute read behind it. Page 16 of 17.
Crew Dragon has seats for seven but has never flown more than fourSpaceX's Dragon 2 capsule was designed to carry seven astronauts, yet on real missions it takes two to four. It docks itself to the International Space Station without human help,…
Junk email is named after singing Vikings in a 1970 Monty Python sketchIn a 1970 Monty Python's Flying Circus sketch, a café menu puts Spam in nearly every dish while a chorus of Vikings drowns out all talk by chanting its name. Early internet users …
Singer sold sewing machines on credit and built the world's biggest factory in ScotlandIsaac Singer did not invent the sewing machine, and he lost a patent fight over it. What his company mastered was selling: door-to-door demonstrators, rent-to-own deals and a Scot…
Siri's first voices were recorded years before anyone knew they would talk backIn July 2005 voice actor Susan Bennett spent sessions reading odd phrases for a speech company, with no idea what they were for. Six years later her voice was answering questions …
Soviet socialist realism required art to be cheerful, clear and loyalFrom 1934 the Soviet state allowed exactly one way to make art: socialist realism. Paintings had to show muscular workers, sunlit fields and busy factories, and tragedy was banned…
Civilizations last about 340 years on average, and age may not matterOne researcher surveyed dozens of ancient civilizations and found they typically endured for roughly 340 years. The Kushite Kingdom managed 1,150; China's Qin dynasty fell after j…
Sennacherib built a Palace without Rival and was killed by his sonsSennacherib's name means the moon god has replaced the brothers, a hint that his older siblings died before he was born. He became one of Assyria's mightiest kings, rebuilt Nineve…
Can they suffer? How sentience became the test for moral concernJeremy Bentham argued that what matters about an animal is not whether it can reason or talk, but whether it can suffer. That question about sentience, the capacity to feel, now s…
The Sentinelese have refused the outside world for centuries, and India protects that choiceOn a small, reef-ringed island in the Bay of Bengal live the Sentinelese, one of the most isolated peoples on Earth. They hunt with bows, push canoes with poles, and have met near…
Five centuries after expulsion, Sephardic Jews still carry medieval SpanishWhen Spain expelled its Jews in 1492, many exiles carried their Castilian speech to Istanbul, Salonica and North Africa. Their descendants kept it alive as Ladino, a language root…
Dušan built a Balkan empire by sieges alone, and it lasted barely 25 yearsIn the 1340s Stefan Dušan doubled the size of Serbia without fighting a single field battle, taking city after city by siege. By 1346 he ruled from the Danube to the Gulf of Corin…
Your SIM card guards a secret key it will never hand to your phoneInside every SIM sits a 128-bit key that the chip is built never to reveal, not even to the handset it lives in. Instead the card signs random challenges from the network, proving…
Secular humanism, from Victorian positivist churches to ethics without GodVictorian London briefly had a Church of Humanity, complete with sacraments, founded by followers of the French thinker Auguste Comte. It was one odd branch of a family tree that …
The Great Reform Act of 1832 and the rotten boroughs it swept awayBefore 1832, the rotten borough of Gatton had just 7 voters, while booming Birmingham had no seat at all. Old Sarum, the most notorious case, kept 13 burgage plots so a patron cou…
Rent-seeking, and the puzzle of why political favours come so cheapSuppose a single government rule would hand a company a billion dollars. Economist Gordon Tullock noticed that such favours can often be bought for around ten million, roughly one…
The Republic of Florence, a merchant state whose gold coin ruled European tradeIn 1252 Florence minted a gold coin with a fixed, trustworthy weight. Within decades the florin had become the standard money for big deals across Western Europe, displacing bars …
How spiral grooves in a gun barrel made bullets fly straightA bullet leaving an M4 carbine spins more than 300,000 times a minute. That rotation comes from rifling, the spiral grooves cut inside a barrel, and it works like a gyroscope to k…
SanDisk and the 20-megabyte flash drive that cost a thousand dollarsIn 1991 a young company called SunDisk built IBM a solid-state drive in the shape of a laptop hard disk. It held 20 megabytes and cost about $1,000. The idea behind it, storage th…- Satoshi Nakamoto, bitcoin's creator, who vanished leaving a fortune untouched since 2010Bitcoin's first block, mined on 9 January 2009, carries a hidden line of text: a front-page headline from The Times about a second bank bailout. Its author signed himself Satoshi …
The Schengen Area, where 29 countries dropped the checkpoints between themEvery day about 1.7 million people cross an internal European border on the way to work without showing a passport. That freedom traces back to a deal signed in 1985 by just five …
Scramjets, the engines that burn fuel in air rushing faster than soundA scramjet has no fans, no turbine and no moving parts at all. It relies on sheer speed to squeeze incoming air, then burns fuel in a stream still moving at supersonic pace. The c…
The ramjet: a jet engine that only works once it's already flying fastA ramjet has no spinning compressor. It simply scoops air by rushing forward, so it cannot start from a standstill and must be flung to speed first. Once there, it thrives, workin…
How a missile maker ended up giving kitchens the microwave ovenIn 1945 Percy Spencer, an engineer at Raytheon, noticed that the magnetron tubes his company built for wartime radar could heat food very quickly. Two years later Raytheon showed …
Two shrinking quarters is not the official definition of a recession everywhereAsk most people what a recession is and they'll say two quarters in a row of falling GDP. In Britain and Canada that is roughly right. In the United States it is not: the governme…
The nearest known exoplanet circles its star in just eleven daysProxima Centauri b orbits the closest star to the Sun, about 4.2 light-years away, and sits in that star's habitable zone. It is probably rocky and a little heavier than Earth. Bu…
Punctuation was invented for reading aloud, not for grammarFor most of history, Western scribes wrote words in one unbroken stream, without spaces or sentence breaks. The earliest marks were there to help people read aloud: Greek playwrig…- India's income per person nearly quadruples once you compare local pricesConvert India's output per person into US dollars at market exchange rates and you get about 1,965. Measure it instead by what that money actually buys at home, and the figure jum…
Quakers took their name from a magistrate's insult in 1650Hauled before magistrates on a blasphemy charge in 1650, George Fox told them to tremble at the word of the Lord. One of them, Gervase Bennet, mockingly called Fox and his followe…- RadioShack's name came from the cramped radio room on shipsOn a ship, the radio shack was the small wooden hut that housed the wireless gear. When brothers Theodore and Milton Deutschmann opened a Boston store for ship radio officers and …
A railgun fires with magnetism and millions of amps, no gunpowderA railgun has no powder charge and usually no explosive warhead. Instead a surge of current, on the order of a million amperes, races down one metal rail, through a sliding projec…
Americans called the slump after 1873 the Great Depression until 1929 came alongThe crash of 1873 started in Vienna and spread across Europe and North America, dragging economies down until 1877 and in Britain and France until 1879. Americans named it the Gre…- A rope maker's failed bid to corner hemp helped sink markets in 1893The National Cordage Company, a rope manufacturer and the most actively traded stock of its day, tried to corner the market in imported hemp. Rumours of trouble made lenders call …
The PDF began as Camelot, a plan to tame PostScript for screensIn 1991 Adobe co-founder John Warnock wrote a paper for a project code-named Camelot. He wanted a trimmed-down PostScript, the language printers used, that would show a page exact…
A penny dreadful gave literature its first vampire with sharpened teethVarney the Vampire, a cheap weekly serial that ran from 1845 to 1847, set down many of the habits fictional vampires still have, and it was the first story to give one sharpened t…
The plastic in most 3D printers starts life as fermented corn or sugarcanePLA, the most common filament in desktop 3D printers, is a plastic made from plants. Starch from corn, cassava, sugarcane or beet pulp is fermented into lactic acid, which is link…
Pope Leo X was made a cardinal at 13 and a priest only after his electionGiovanni de' Medici received the tonsure at seven, held dozens of income-paying church posts by ten and was named a cardinal at 13. When he was elected pope on 9 March 1513, he wa…- All eight billion people could stand in an area smaller than Puerto RicoPack every person on Earth into a loose crowd, allowing each just under a square metre, and the whole of humanity would fit into about 8,000 square kilometres. That is a little sm…
Our nearest stellar neighbour will keep shining for another four trillion yearsProxima Centauri, the closest star after the Sun at 4.25 light-years, is too dim to see without a telescope. Yet this small red dwarf will outlast the Sun by an enormous margin, s…
NASA's Orion capsule packs a gym that doubles as a doorstepSpace inside a deep-space capsule is precious, so objects earn their keep twice. Orion's compact flywheel exercise device lets astronauts do aerobic and resistance workouts on a c…
Why emergency crews still carry pagers in the smartphone ageA commercial paging transmitter typically radiates about 1,000 watts, while a mobile phone tower puts out roughly 0.6 watts per channel. Each paging mast therefore blankets a far …
A Scottish mill town gave its name to a Kashmiri teardrop designThe curling teardrop known across the Western world as Paisley originated in Kashmir and was woven in several European countries. Yet Paisley, a weaving town just west of Glasgow,…
Volcanic glass carries a chemical fingerprint that maps ancient trade routesEach volcano, and sometimes each single eruption, yields obsidian with its own chemical signature. That lets archaeologists match a blade to the hillside it came from. Pieces from…
The first steamship across the Atlantic sailed with none of its booked passengersWhen SS Savannah left for Liverpool in 1819, all thirty-two people who had reserved places stayed ashore. Their caution was understandable: the ship ran on steam for no more than …
Athens used red-dyed ropes to herd citizens into the AssemblyWhen the Athenian Assembly was summoned, public slaves swept the Agora with ropes soaked in red ochre. Anyone dawdling there instead of heading to vote risked a stained cloak, and…
Okinawa's old kingdom paid tribute to two empires at onceAfter Satsuma invaders captured its king in 1609, the Ryukyu Kingdom answered to Japan while still sending tribute to China. China traded only with tributary states, so the island…
Titanic's fourth funnel was mostly for showThe original plan for White Star's giant liners had three stacks. Designers added a fourth to improve their appearance, and on all three sisters it was a dummy that vented galley …
NAFTA began with Mexico's pitch and Canada's fear of being left outAfter Canada and the United States signed a free trade deal in 1988, Mexico's president Carlos Salinas de Gortari proposed a similar pact to attract investment following Latin Ame…
North West England holds the country's highest peak and deepest lakeOne region of England collects most of its natural records. Scafell Pike in Cumbria, at 978 metres, is the country's highest summit. Windermere is its largest natural lake, Wast W…- Northampton nearly had England's third university before Oxford and CambridgeIn 1261 Henry III granted Northampton a university by royal charter. Had it lasted, it would rank behind only Oxford and Cambridge in age. Four years later the king shut it down, …
Nobody agrees where the North of England actually startsAsk southerners and northerners to draw the line between North and South, and southerners put it further south. Some jokingly start the North at the Watford Gap between Northampto…- A reactor at sea cannot count on gravity to shut itself downOn land, a reactor's control rods can simply drop into place under gravity. A ship pitches and rolls, so marine reactors need shutdown systems that work at any angle. That is just…
- A tiny fraction of late neutrons is what makes reactors controllableMost neutrons from splitting uranium fly out instantly, but about 0.65 percent arrive late, released by fission products over milliseconds to minutes. That small delay is the whol…
How nuclear testing moved from open skies to sealed shafts undergroundThe first atomic test lit the New Mexico desert on July 16, 1945, with the force of about 20 kilotons of TNT. Over the following decades more than 2,000 tests followed, first on t…- Ayn Rand named Objectivism only because existentialism was already takenAyn Rand wanted to call her philosophy existentialism, since it rested on the primacy of existence over the mind. Another school had already claimed that label, so she settled on …
The Nordic model pairs free trade and high taxes with unions almost everywhereIn 2019, 90.7 percent of Icelandic workers belonged to a union, against 16.3 percent in Germany and 9.9 percent in the United States. That density is one pillar of the Nordic mode…
The Motorola Razr sold on looks alone, with ordinary insidesInside, the 2004 Motorola Razr V3 was nearly identical to the unremarkable V500 and V600 phones that preceded it. What changed was the shell: a startlingly thin aluminium flip bod…
Hunter-gatherers in Louisiana raised earthworks before Egypt built its pyramidsArchaeologists long assumed that only farming societies with food surpluses could organise monumental building. Then radiocarbon dates from Watson Brake in northern Louisiana came…- The first multinationals kept armies and ran colonial portsToday's global companies trace their lineage to chartered trading firms of the 1600s. The British East India Company, founded in 1600, did more than buy and sell: it appointed loc…
- One lost battle in 711 opened almost all of Visigothic SpainIn 711 a commander named Tariq ibn Ziyad sailed from North Africa to southern Spain. Watchers on shore reportedly mistook his ships for ordinary trading vessels. By July his army …
Why city children who stay indoors are losing their distance visionAmong children in rural Nepal, nearsightedness affects around 1 percent. In some big Chinese cities the figure reaches 37 percent. Genes matter, but a difference that large points…