Intellect PlusCards starting with E
1,803 cards. Page 11 of 31.
Einstein once lectured on why rivers wiggle, and a Turkish river named the loopsThe word meander comes from a Turkish river so twisting that ancient Greeks used its name for anything winding. In 1926 Albert Einstein proposed that Earth's rotation might start …
Einstein promised his Nobel money to his ex-wife before he had won itWhen Albert Einstein and Mileva Marić divorced on 14 February 1919, part of the settlement said that if he ever won a Nobel Prize, the cash would go to her. It was a bet on his ow…
Einstein tweaked his own equations to stop the universe from movingIn 1917 Einstein added a cosmological constant to general relativity for one reason: to keep the universe static, as he believed it was. Within about a decade a Belgian priest pro…
Einstein used his own theory to argue that black holes were impossibleIn 1939, Albert Einstein published a calculation meant to show that black holes could not exist. He assumed pressure or spin would always halt a collapsing star before it shrank t…- Einstein's 'greatest blunder' may decide how the universe endsBelieving the cosmos was static, Einstein added a cosmological constant to his equations to hold gravity in check. When Hubble showed the universe was expanding, Einstein called i…
- Einstein's self-described ugly fudge factor came back to explain an accelerating cosmosIn 1917 Albert Einstein bolted an extra term onto his equations to hold the universe still, and he disliked it from the start. Once the cosmos was found to be expanding, he droppe…
Einstein's wildest predictions about the universe were actually correctWhen Albert Einstein first proposed his theories, his most radical ideas were dismissed as far-fetched. Even he doubted their likelihood. Yet, these three staggering predictions—e…
Eisenhower made the phrase military-industrial complex famous, but he did not invent itOn 17 January 1961, departing president Dwight Eisenhower, a retired five-star general, warned Americans to guard against the unwarranted influence of the military-industrial comp…
Eisenstein's Potemkin turned a mutiny into montage legendThe 1925 Soviet silent Battleship Potemkin retells the 1905 revolt aboard a Black Sea warship. Directed by Sergei Eisenstein for Mosfilm, it became a textbook of montage—especiall…
Eisenstein's Soviet masters punished him for the very montage the world admiredBattleship Potemkin made Sergei Eisenstein famous far beyond Moscow in 1925. His obsession with editing, camera angles and crowds thrilled foreign critics, yet at home it drew att…
Ejaculation is a complex biological reflex that functions in two distinct, involuntary stages.Ejaculation is more than a simple release; it is a sophisticated two-phase biological process driven by muscular contractions and spinal reflexes. While often associated with sexu…
El Al broke an airline taboo by shrinking the Atlantic Ocean in an advertAirlines in the 1950s never showed the ocean in their advertising, fearing it would remind passengers of crashes. In 1958 El Al ran an American newspaper ad with a shrunken Atlant…
El Capitan is a 3,000-foot granite monolith with a history of myth and mastery.Rising from Yosemite Valley, this massive rock formation has evolved from a legendary inchworm site into the world's premier big wall climbing destination. Whether through the len…
El Dorado was originally a golden man, not a city of goldThe legend began with a ruler, the Golden One, who coated himself in gold dust and washed it off in a sacred lake. Spanish treasure hunters turned that ritual into a lost golden k…
El Niño began as a goalkeeper and learned to strike from a cartoonFernando Torres first played in goal. At seven he switched to attack for a neighbourhood indoor team, taking inspiration from the anime Captain Tsubasa, and at ten he scored 55 go…
El Niño was named by Peruvian fishermen after the Christ ChildWarm water showing up off Peru around Christmas gave El Niño its name, the Boy. Today the term describes one phase of a Pacific-wide swing in winds and sea temperatures that bring…
El Paso is a desert metropolis defined by its unique geography and border identityStraddling the Rio Grande and the Franklin Mountains, El Paso is a city of deep contradictions. It is a major American urban center that sits further from its own state capital th…
Elam was a Mesopotamian label for many highland peoplesElam occupied lowlands and highlands of what is now western Iran and bits of southern Iraq. Writing appears around 3000 BC beside Sumer. Scholar Daniel Potts argues the name itsel…
Elamite Susa stars in Esther, Ezra, and Aeschylus alikeSusa, in Iran’s lower Zagros about 250 kilometres east of the Tigris between the Karkheh and Dez, underlies modern Shush. An Elamite name (Šušun/Šušan), it ranks among the Ancient…- Elche CF: A Century of Resilience, Financial Turbulence, and Dramatic Spanish Football RivalriesFounded in 1923, Elche CF has navigated a century of extreme highs and lows, from reaching the Copa del Rey final to suffering administrative relegation. This Spanish club, define…
Elche is home to the largest palm grove in Europe, a desert-like oasis.While Spain is known for its coast, Elche hides a massive, UNESCO-protected palm forest within its borders. This city, which evolved from ancient Iberian roots to a modern industr…
Elder: the instant hedge whose name comes from an ancient Greek whistleElder twigs have soft pith that pushes out easily, so people hollowed them into whistles, flutes, blowguns and taps for maple syrup. The genus name Sambucus even recalls an ancien…
Eleanor of Aquitaine wore two crowns, yet almost nothing she wrote survivesEleanor of Aquitaine was queen of France, then queen of England, and mother of two English kings. She ranked among the richest people in 12th-century Europe. Yet no one wrote her …
Election denialism has shifted from national rhetoric to local control of voting infrastructureWhile national attention focuses on the White House, a persistent movement of election deniers is quietly embedding itself within local government. By securing positions as poll w…
Election law is the hidden architecture that determines who holds power and why.Election law is more than just counting ballots. It is the complex legal framework governing everything from voter registration and campaign finance to the redrawing of electoral …
Electoral fraud is more than just stuffing ballot boxes; it is a systemic subversion.Electoral fraud encompasses any illegal interference designed to manipulate election results, from ballot stuffing to sophisticated voter suppression. While laws vary globally, th…
Electric 'eels' are knifefish split into three speciesSouth America's electric eels stun prey with shocks of up to 860 volts, yet they are knifefish, not true eels. Linnaeus described one species in 1766, and for over two centuries t…
Electric cars ruled the roads once before, until the electric starter killed themAround 1900 electricity was a favoured way to power a car: quiet, clean and free of crank handles. Electric cabs carried London's first motorised fares, and in 1899 an electric ca…
Electric flux measures the total reach of an electric field across a specific areaImagine an electric charge as a source radiating invisible influence into space. Electric flux quantifies how much of that influence passes through a defined boundary. It is a fun…
Electric organs evolved eight separate times, mostly from ordinary muscleSome 350 fish species can generate electric fields, and they did not inherit the trick from one ancestor. Electric organs arose independently eight times, built mostly from modifi…
Electric potential energy is the hidden work required to assemble a system of charges.Imagine building a structure from invisible, repelling magnets. Electric potential energy represents the total work an external agent performs to bring charged particles from infi…
Electric power is just voltage times current, until alternating current complicates thingsA watt is one joule of energy moved every second, and in a simple circuit you find the power by multiplying voltage by current. That tidy rule hides some oddities: electrons actua…
Electric trains passed 200 km/h in 1903, sixty years before bullet trainsIn October 1903 two experimental electric railcars raced along a military line south of Berlin, one reaching 206.7 km/h and the other 210.2 km/h. They proved fast electric rail co…- Electric trucks are older than petrol ones, and are now making a comebackBattery-powered goods vehicles have been on sale continuously since the mid-19th century, before Karl Benz built the first combustion-engined truck in 1895. Liquid fuels, packing …
Electric vehicle charging is simpler than you might expectThis video serves as a foundational guide to electric vehicles, clarifying the technology behind how they are powered. It addresses common misconceptions about charging equipment …
Electric vertical take-off and landing vehicles are set to redefine how we navigate citiesElectric vertical take-off and landing aircraft, or eVTOLs, merge drone-like agility with advanced electric propulsion to bypass urban congestion. By utilizing multiple rotors for…
Electrical discharge machining uses controlled sparks to carve the world's hardest metal components.Instead of cutting metal with physical force, electrical discharge machining (EDM) uses intense, recurring sparks to erode material with extreme precision. By submerging parts in …
Electrical forces can pull polymer solutions into nanometre-scale fibresResearchers demonstrated that a process called electrospinning can create incredibly fine polymer fibres. By applying electrical forces to a polymer solution or melt, the research…
Electricity is not just a modern invention but a fundamental force of nature.Long before we harnessed it for light and computation, humans encountered electricity through the numbing shocks of electric fish. Today, we understand it as a core interaction of…
Electricity is the invisible highway powering modern civilizationImagine a world without the internet, medical imaging, or smartphones. Electrical engineering is the invisible discipline that made our modern life possible by mastering the flow …
Electrification is more than just switching to power; it is a strategic economic shift.Electrification is the process of converting devices and sectors from non-electric energy sources to electricity. Far from being a singular goal, it is a versatile tool for decarb…
Electrocatalysis offers a new way to control reactive intermediates in organic synthesisA review of recent innovations in electrochemistry found that electrocatalysis is becoming a vital tool for organic synthesis. By using redox-active catalysts, researchers can mor…
Electrolux got its name from a vacuum motor maker and a lamp companyThe word Electrolux is a merger in miniature. Elektromekaniska, a Stockholm firm making motors for vacuum cleaners, joined forces with Lux, which made outdoor kerosene lamps. In 1…
Electronic Arts almost became Electronic Artists until one employee objectedAt an off-site meeting in 1982, Trip Hawkins' tiny games start-up was stuck choosing a name. Several staff liked Electronic Artists, a nod to the film studio United Artists. Then …
Electronic literature is a born-digital art form that cannot exist on paperElectronic literature is not just digitized books; it is a genre where computation is the canvas. From 1950s generative poetry to modern social media netprov, these works rely on …
Electronic noise is not just interference; it is a fundamental property of the physical universe.We often think of electronic noise as a nuisance to be filtered out, but it is deeply rooted in thermodynamics and quantum physics. From the random thermal motion of electrons to …
Electronic warfare is the invisible battle for control of the electromagnetic spectrum in modern conflict.Modern warfare is fought as much in the airwaves as on the ground. By manipulating the electromagnetic spectrum, militaries can blind enemy radar, silence communications, and spoo…
Electrons do not actually spin, yet they possess an intrinsic angular momentum called spin.The term spin suggests a physical rotation, but this is a misleading metaphor. If electrons truly spun like tops, they would need to rotate faster than the speed of light to match…
Electrophones: sound born in circuits, not vibrating woodAn electronic musical instrument—musicology’s electrophone—makes sound with circuitry, sending a signal to an amp and speaker. Keyboards often control pitch, yet modern setups spl…
Eleftherios Venizelos: The Cretan Revolutionary Who Became the Maker of Modern GreeceFrom a hilltop rebel in Crete to an eight-term Prime Minister, Eleftherios Venizelos reshaped the Greek state. He navigated the collapse of the Ottoman Empire, survived internal c…
Element 121: Why the next frontier of the periodic table remains stubbornly out of reach.Unbiunium, or element 121, is the hypothetical gateway to the superactinides. While theoretical models place it near the elusive island of stability, synthesizing it remains a mon…
Element 122: The elusive superheavy atom that may exist only in theoryUnbibium, or element 122, remains a chemical ghost. Despite decades of intense laboratory efforts to synthesize this hypothetical superheavy element, it has never been observed. W…
Elements in coal exist in various chemical forms and complex associationsA review of 73 elements and rare gases in coal found that these substances do not all exist in a single state. Instead, they are distributed across inorganic minerals, organic str…
Eleonora Duse: The actress who redefined truth by disappearing into her charactersEleonora Duse was the antithesis of the performative star. While her rival Sarah Bernhardt projected a singular, magnetic personality, Duse sought to vanish, believing that true a…
Elephant cousins the size of a stout marmotHyraxes—dassies of family Procaviidae—are thickset African herbivores thirty to seventy centimetres long and two to five kilograms. They look like overgrown pikas, yet their close…- Elephants are closer kin to golden moles than to rhinos or hipposElephants, manatees, aardvarks, hyraxes and tiny golden moles look nothing alike, yet they share one family tree. Nobody recognised it until DNA studies in 1998. The group, Afroth…
Elephants are closer kin to golden moles than to rhinos or hipposAfrotheria includes golden moles, elephant shrews, tenrecs, aardvarks, hyraxes, elephants, sea cows; little resemblance; Africa island continent until about 20 million years ago
Elephants carry 20 copies of the gene nicknamed the guardian of the genomeElephants have huge bodies and trillions of dividing cells, yet they rarely get cancer. Part of the explanation may be that they carry 20 copies of TP53, the gene for a protein ca…
Elephants carry a fetus for 23 months; jumping mice need just 18 daysA fetal stage lets animals give birth to young that are already well developed, at a real cost to the mother. How long that takes varies enormously: placental mammals carry young …
Elephants communicate over dozens of miles by listening with their sensitive, fatty feetWhile African elephants possess magnificent ears, they also rely on a hidden seismic network to exchange information across the savanna. By detecting low-frequency vibrations thro…