Intellect PlusIndustry
243 cards. Each one is a 40-second story with a five-minute read behind it. Page 4 of 5.
Japanese shops were selling recycled paper back in 1031Recycling feels like a modern virtue, but the first recorded sale of repulped paper came from Japanese shops nearly a thousand years ago. Europeans melted scrap bronze long before…
Before fridges, New England ice was shipped to Havana and sold at a profitIn the early 1800s Frederic Tudor had an idea people thought mad: cut frozen lake ice in New England and sail it to the Caribbean. He lost thousands at first. Then better insulati…
Steel gets rolled like pastry dough, and that shapes more metal than anything elseSqueeze a slab of metal between spinning rollers and it thins and lengthens, much as dough does under a rolling pin. This humble idea handles more tonnage than any other manufactu…
Why modern towns keep toilet waste and rainwater in entirely different pipesBeneath most streets built since the mid-twentieth century run two networks that never meet. One carries rain to the nearest river; the other takes only what leaves homes and busi…
Sanitation pays back about five and a half dollars for every one spentToilets rarely make headlines, yet billions of people still lack a safe way to deal with human waste. The quiet chain that carries excreta away from homes, treats it and keeps it …
Porcelain is named after a seashell, and Europe spent centuries chasing its secretThe word porcelain comes from an old Italian name for the cowrie shell, whose glossy surface the ware resembled. Chinese potters took centuries to perfect it. European makers need…- Rome's lead water pipes were lined with protective mineral scalePlumbing takes its name from plumbum, Latin for lead, because Roman pipes were made of it. Surprisingly, their aqueducts seldom poisoned anyone: the water was so rich in calcium t…
Rubber got its English name from erasing pencil marksIn 1770 Joseph Priestley noticed that a lump of the strange South American gum rubbed pencil marks off paper beautifully, and the name rubber stuck. Olmec players had been bouncin…
A submarine engine choice shaped most of the world's nuclear power plantsWhen the U.S. Navy needed a reactor for USS Nautilus, it picked the pressurized water design because it was compact, simpler and easier to run in a cramped hull. The submarine wen…
China drilled oil wells with bamboo poles in 347 CEThe earliest known oil wells were sunk in China in 347 CE, using bits fixed to bamboo poles and reaching as deep as about 240 metres. The oil was not the prize. It was burned to b…
Captured prisoners at Talas probably did not bring papermaking westA popular tale says the Islamic world learned papermaking in 751, when Chinese craftsmen taken prisoner at the Battle of Talas were forced to reveal the secret. Documents dig hole…
In 1490 one writer bet that parchment would outlast printed paper by centuriesIn 1490 Johannes Trithemius confidently argued that handwriting on parchment would survive a thousand years, while printing on paper might manage two hundred at best. He underesti…
Pasteurization started as a fix for sour wine, not safe milkOn a summer holiday in Arbois in 1864, Louis Pasteur tackled a local complaint: aged wines kept turning acidic. He found that briefly warming young wine to around 50 to 60 °C kill…
PVC was first spotted as white gunk in a flask left in sunlightIn 1835 the French chemist Henri Victor Regnault left vinyl chloride sitting in the sun and later found a white solid at the bottom of the flask. It was polyvinyl chloride, now th…
Venice turned out nearly a warship a day centuries before FordAt its height the Venetian Arsenal employed 16,000 people and launched almost one ship every day, assembling vessels from prefabricated parts in what has been called the world's f…
One litre of fuel can match a day of many workers' toilA human labourer turns only about 1 to 5.5 percent of the energy in food into useful work. Burn a single litre of fossil fuel in an engine and you get roughly what 50 hands could …
Ancient Indian steel hid nanostructures that modern researchers finally decodedBy around 200 BCE smiths in southern India were making an ultra-high carbon steel in crucibles. Rome imported it as Seric Iron, and Europe later knew blades made from it as Damasc…
Isaac Asimov's case for gold as humanity's first metalIsaac Asimov reasoned that gold was probably the first metal people worked. Its chemistry means it lies around in nature as nearly pure nuggets, and it is soft and stretchy enough…
The rotten-egg smell of a gas leak is added on purposeMethane, the main ingredient of natural gas, has no colour and no smell at all. The stink you notice near a leaking stove comes from an odorant such as methanethiol, deliberately …
The earliest known industrial robot was built from Meccano partsIn 1937 an engineer named Bill Griffith P. Taylor assembled a crane almost entirely from Meccano, the toy construction set, and drove it with one electric motor. A punched paper t…
Eli Whitney's famous musket demonstration hid a handmade secretIn 1801 Eli Whitney took apart ten muskets before Congress, mixed the pieces in a pile and reassembled them. Lawmakers were thrilled and ordered standard equipment across the mili…
A kerosene lamp once lit an emergency operation in LvivOn the night of 31 July 1853, surgeons in Lviv faced an urgent operation that candlelight could not support. They sent for Ignacy Lukasiewicz, a local pharmacist tinkering with a …
A modern landfill is really a giant, slow-cooking microbial reactorRubbish dumped in a sanitary landfill does not just sit there. Engineers design these sites as bioreactors where microbes spend decades dismantling food scraps, paper and garden w…
The first production laser cutter drilled holes in diamondLaser cutting started with about the hardest job imaginable. In 1965 a machine from the Western Electric Engineering Research Center went into production boring holes through diam…
In Catalan, to do the laundry means to gossipAcross Europe, villages that could afford it built a lavoir, a wash-house fed by a stream, where women beat and rinsed their families' clothes every week. It became a women-only m…
Plunge hot steel into water and its crystals rearrange near sound speedHeat steel until it glows red to orange, around 820 to 870 degrees Celsius, then dunk it in water. Carbon atoms get trapped before they can escape the shifting crystal lattice, st…
Hydroelectricity began with one lamp in a Victorian art galleryIn 1878 the industrialist William Armstrong rigged a water-driven generator at Cragside, his Northumberland house, to light a single arc lamp in his picture gallery. It was the fi…- A waterfall can compress air for mines with no moving partsIn 1910, on the Montreal River near Cobalt, Ontario, engineers built a trompe. Water tumbled down a shaft dragging air bubbles into an underground chamber, where the trapped air w…
A famous stage magician was showing off light bulbs before Edison was bornIn 1851 the French illusionist Jean Eugene Robert-Houdin lit incandescent bulbs on his estate at Blois, and they now sit in the town's chateau museum. He was one of dozens who glo…
An early rocket firework called the earth rat once startled a Chinese empressAt a feast given in her honour by Emperor Lizong in the 13th century, Empress Dowager Gong Sheng was badly startled when a dilaoshu, or earth rat, went off near her. This scurryin…- Why a hammered car part beats a cast one by a fifthSqueeze or pound metal into shape instead of pouring it into a mould, and it comes out tougher. Forged parts typically have about 20 percent more strength for their weight than ca…
- Medieval Baghdad had tar-paved streets and a doctor who distilled keroseneLong before the oil age, the streets of Baghdad were paved with tar from nearby petroleum fields, and the Persian physician al-Razi wrote down how to distil crude oil into kerosen…
The first geothermal generator in 1904 lit exactly four light bulbsOn 4 July 1904 at Larderello in Italy, Prince Piero Ginori Conti hooked a generator up to volcanic steam and switched on four light bulbs. Seven years later the same spot hosted t…
An old-style light bulb turns about 95 percent of its power into heatA classic incandescent bulb heats a tungsten coil until it glows, and only 2 to 5 percent of the electricity comes out as visible light. Getting even that far took more than a cen…
The last few miles of wire between the power grid and your socketElectricity crosses the country at enormous voltages, but it would be lethal and useless at that level inside a house. Distribution is the final stage: substations and pole transf…
Power lines run at huge voltages so less energy is lost as heatPush electricity down a long wire and some of it warms the metal instead of reaching anyone. Raising the voltage lowers the current and cuts that waste, which is why transmission …- Across a whole continent, grid generators turn in lockstepOn a synchronous electrical grid, every generator's alternating current rises and falls at almost the same instant, across areas as large as continental Europe. North American gri…
- Chinese alchemists seeking eternal life invented the first explosiveTaoist alchemists in China, searching for an elixir of immortality, produced something very different: gunpowder. It went to war by 1161 and remained the only chemical explosive f…
Extrusion shapes metal, plastic and pasta the same way you squeeze toothpastePush soft material through a shaped opening and it comes out with that exact profile, as long as you like. Extrusion makes window frames, pipes, tubes and even food this way. When…
Venice was mass-producing ships on assembly lines centuries before steamThe factory seems a child of the Industrial Revolution, yet the Venice Arsenal, founded in 1104, was already building ships on assembly lines from standard parts. What changed in …
Die casting began as a way to make printing typeThe machines that now stamp out car parts and appliance housings trace back to 1838, when die casting was invented to produce movable type for printers. By forcing molten metal in…
Fossilised algae from the Elbe made nitroglycerin safe to carryNitroglycerin was far more powerful than gunpowder but so unstable it was useless for business. Alfred Nobel tried mixing it with cement, coal and sawdust before hitting on diatom…- Michael Faraday's spinning copper disc started the age of generated powerAlmost all electricity reaching homes comes from spinning machines that turn motion into current. The principle behind them was discovered by Michael Faraday in 1831 and 1832, and…
Turning seawater into drinking water now takes a tenth of the energyIn 1970, stripping the salt from a cubic metre of seawater took roughly 20 to 30 kilowatt hours of energy. By 2018 the global average had fallen to about 3. That tenfold improveme…
Modern detergent was born from a wartime shortage of soap fatsSoap has washed clothes since Sumerian times, around 2,500 BC. But when the First World War left Germany short of fats, chemists turned to coal tar for substitutes. Those early ef…
A carpenter was originally a maker of carriages, not housesCarpenter traces back through Old French to the Latin carpentarius, a maker of carriages. English once had its own word for a builder in wood, wright, related to work, and it surv…
People fired clay figurines thousands of years before they made potsThe oldest known ceramics, from southern central Europe and at least 26,000 years old, are sculpted figures rather than dishes. Everyday pottery became common only around 10,000 y…
Henry Ford turned car-factory sawdust into the Kingsford charcoal briquetteBackyard barbecue briquettes owe a debt to the car industry. Ellsworth Zwoyer of Pennsylvania patented the American briquette in 1897, but Henry Ford popularised it by feeding lef…
Fewer than one in a hundred chemical plant designs ever gets builtBefore a new chemical plant rises, engineers sketch dozens of alternatives, and typically under 1 percent of design ideas reach commercial use. Cost studies kill most of them earl…
A Roman recipe for underwater concrete still matches modern practiceWriting around 25 BC, the Roman architect Vitruvius advised mixing one part lime with two parts volcanic ash from Pozzuoli, near Naples, for concrete meant to sit underwater. That…- Those giant power station towers are breathing out mostly water vapourThe huge waisted towers beside power stations look like smokestacks, and many people assume they pour out fumes. What rises from them is almost entirely water vapour. Their job is…
- Whether biofuel helps the climate depends on where its crops are grownBurning biofuel releases carbon that the crops pulled out of the air only months before, which is why it is often called carbon-neutral. Yet if forests or grasslands are cleared t…
- Bleaching linen once took six months and involved sour milkIn 17th-century Western Europe, whitening cloth was a slow industry. Fabric was soaked in alternating baths of lye and acid, the acid often lactic acid from soured milk, and the w…
Modern candle wicks are designed to trim themselves as they burnBefore the 19th century, anyone burning a candle had to keep trimming the wick with scissors or snuffers, or it would smoke and gutter. Today's wicks are built to curl over as the…
Your toothpaste and a glacier both work as abrasivesAn abrasive does not strictly need to be harder than what it wears down. Any two solids rubbed together long enough will erode each other: soft shoe soles hollow out stone steps o…- Neanderthals were making glue from birch bark 200,000 years agoThree stone tools found in central Italy, about 200,000 years old, still carry traces of birch bark tar used to fix them to wooden handles. They are the oldest known hafted tools …
Aqueducts are older than Rome by well over a thousand yearsAqueducts call to mind Roman arches, but the Minoans of Crete were probably building them around 2000 BC. By the 7th century BC the Assyrians had run an 80-kilometre limestone cha…
Ford's moving assembly line was inspired by a Chicago slaughterhouseThe idea behind the Model T production line came from a place that took things apart. After watching carcasses glide along a conveyor at a Chicago meatpacker, with each worker cut…
The ancient sunlight powering our modern world is running outEvery time you burn coal, oil, or gas, you are releasing energy captured by prehistoric organisms millions of years ago. While this chemical legacy built the Industrial Revolution…- From ancient medicine to global power: the long, oily history of petroleumLong before it fueled the Second Industrial Revolution, petroleum was a tool of war, a medicinal salve, and a construction material. This complex mixture of hydrocarbons has shape…