Intellect PlusCards starting with R
1,301 cards. Page 5 of 22.
Rashida Tlaib: The First Palestinian-American Woman Elected to the United States CongressAs a member of the Squad and the first Palestinian-American woman in Congress, Rashida Tlaib has become a polarizing figure in American politics. Her vocal criticism of Israeli go…
Rason is the strategic North Korean port city where three nations converge and collide.Tucked into the northeast corner of North Korea, Rason serves as a vital, ice-free gateway to the Sea of Japan. Bordering both China and Russia, this special city has evolved from…
Rastafari took its name from an Ethiopian emperor's title before his coronationBefore he was crowned Haile Selassie in 1930, the future emperor of Ethiopia was Ras Tafari Makonnen, ras being a noble rank like duke. Jamaican preachers such as Leonard Howell h…
Rastafarians revere Haile Selassie as divine, though he stayed Ethiopian OrthodoxTo followers of Rastafari, which arose in the 1930s, Haile Selassie is the returned Jesus. The man himself remained a member of the Ethiopian Orthodox Church. He ruled Ethiopia fo…
Rathlin Island reveals deep genetic continuity and a unique history of human settlementOff the coast of Northern Ireland, tiny Rathlin Island holds secrets of ancient populations and modern health. While known for its seabird colonies and shipwrecks, the island serv…
Ratification is the legal bridge between a proposed agreement and its binding realityRatification is more than a rubber stamp; it is the formal mechanism that transforms a negotiated promise into a legally enforceable obligation. Whether in private contracts, inte…
Rationalists believed you could discover truths without getting off the couchCan you know something for certain without looking at the world? Rationalists say yes. The number three is prime and bigger than two, so a prime greater than two exists, and no ex…
Rationals are exactly the fractions of two integersA rational number is a quotient p/q of integers with q nonzero—every integer included when q is 1. The set of rationals closes under addition, subtraction, multiplication, and div…
Ratios began as Greek logos and now shape your TV screenEight oranges and six lemons give a ratio of 8 to 6, which reduces to 4 to 3. That same 4:3 once described television screens, before widescreen sets moved to 16:9. Behind the hum…
Rats did not start plague—starving fleas didYersinia pestis still causes roughly 600 reported cases a year, mostly in places like Congo, Madagascar, and Peru. Antibiotics cut death risk to about 10% from roughly 70% untreat…
Rats raised in darkness grow fewer spines on their visual neuronsYoung rats kept in the dark develop brain cells in their visual cortex with fewer tiny spines on their branches, and with branches laid out differently. Those branches are dendrit…
Rattan is a climbing palm that can stretch hundreds of metresThe cane in a wicker chair comes from a palm, not a vine. Rattan is a group of roughly 600 climbing palm species from the tropical forests of Asia and Africa, whose hooked spines …
Ratu Sir Kamisese Mara: The Hereditary Chief Who Shaped Modern Fiji’s Tumultuous Political LandscapeAs the founding father of independent Fiji, Ratu Sir Kamisese Mara navigated decades of ethnic tension, economic transformation, and military coups. A hereditary paramount chief w…
Rauf Denktaş: The Barrister Who Shaped the Contested History of Northern CyprusFrom a Paphos-born lawyer to the founding president of a state recognized only by Turkey, Rauf Denktaş defined the Turkish Cypriot political landscape for decades. His career span…
Raúl Esparza is the rare performer nominated for every eligible Tony acting categoryRaúl Esparza has built a career defined by extraordinary versatility, moving seamlessly between Broadway musicals, intense plays, and television dramas. While he is widely recogni…
Raul Pompeia: The brilliant Brazilian novelist whose life ended in a tragic, public spiralRaul Pompeia was a central figure in Brazilian literature, best known for his masterpiece O Ateneu. Yet, his life was defined by intense political fervor, broken friendships, and …
Ravel rejected Impressionism yet ruled French music anywayMaurice Ravel is forever paired with Debussy under the Impressionist sticker both men refused. In the 1920s and 1930s he was nonetheless ranked France's greatest living composer—a…
Ravi Shankar shortened Ravindra to mean the sunBorn Robindro Shaunkor Chowdhury in Benares on 7 April 1920, the sitarist toured as a child dancer with brother Uday's troupe before committing to the instrument. From 1956 he car…
Ravi Shastri: From Record-Breaking All-Rounder to Architect of Indian CricketBefore he became the voice of Indian cricket and its head coach, Ravi Shastri was a towering, versatile force on the pitch. Standing 6' 3", he evolved from a spin bowler into a ba…
Ravidas, the leatherworker's son whose hymns sit in the Sikh scriptureBorn into a Chamar family of leatherworkers, a caste then treated as untouchable, Ravidas became a poet-saint whom Brahmins reportedly bowed to. Forty-one of his poems were placed…
Rawalpindi is Islamabad's older twin on the Potohar PlateauRawalpindi—Pindi for short—is Punjab's third-largest city and Pakistan's fourth-most populous, sitting on the Soan River beside the capital Islamabad as the twin cities. Founded i…
Rawls asked what society you'd pick without knowing your place in itJohn Rawls imagined people designing a society from behind a veil, unaware whether they would be rich or poor. He argued they would choose equal basic liberties, fair opportunity,…
Ray Charles was a master of sound who redefined the boundaries of American music.Often called The Genius, Ray Charles transcended genre by blending gospel, jazz, and blues into a singular, emotive style. From his early days in Florida to his status as a global…
Ray filmed Apu's life on a shoestring and rewrote world cinemaSatyajit Ray's Bengali trilogy—Pather Panchali (1955), Aparajito (1956), The World of Apu (1959)—follows one boy's path from village poverty to adult grief. Shot with amateurs on …
Ray Kurzweil: The Inventor Who Believes We Can Outrun Our Own DeathsRay Kurzweil is a prolific inventor and futurist who views the human body as a system of programs waiting to be upgraded. From pioneering optical character recognition to predicti…
Ray Lewis: The Intense Linebacker Who Redefined Defensive Dominance in the NFLWidely regarded as the greatest middle linebacker in professional football history, Ray Lewis anchored the Baltimore Ravens for 17 seasons. Beyond his record-breaking tackling sta…
Ray Mancini fulfilled his father's dream, but the cost was a tragic ring death.Ray Mancini rose to boxing stardom in the 1980s, driven by a vow to win the world title his father never could. He achieved that goal, yet his career became forever linked to the …
Ray tracing mimics light to create photorealistic images, but it works in reverse.While light travels from sources to our eyes, computer graphics ray tracing sends rays from the camera into the scene. This backward approach is vastly more efficient, allowing co…
Ray-finned fish own almost every living fish nicheNearly ninety-nine percent of more than thirty thousand living fish species are ray-finned actinopterygians. Teleosts alone make up over half of all living vertebrates. From deep …
Raye's second album is a maximalist exploration of hope, emotion, and musical rebellionAfter a harrowing incident where her car and songbooks were stolen, British singer-songwriter Raye returned to create a sprawling, 73-minute record. This Music May Contain Hope bl…
Raye’s search for a lifelong partner became the first UK number one of 2026British singer-songwriter Raye turned a personal search for love into a global pop phenomenon. With its brassy, retro-inspired sound, the track Where Is My Husband! resonated acro…
Raymond Burr's own life story was full of details nobody could verifyRaymond Burr won two Emmys as the unbeatable lawyer Perry Mason, but after his death in 1993 much of his biography proved impossible to confirm. His accounts of what he did around…
Raymond Carver transformed the American short story by finding profound meaning in blue-collar life.Before he became a literary icon, Raymond Carver was a janitor and sawmill worker who wrote in the margins of his shifts. His work, often labeled as minimalism, captured the quiet…
Raymond Chandler wrote his first original screenplay while fueled by a dangerous drinking bingeThe 1946 noir classic The Blue Dahlia was born from a desperate studio deadline and a writer pushed to the brink. To finish the script, Raymond Chandler demanded a bizarre array o…
Raymond Queneau: The French Writer Who Treated Literature Like a Mathematical EquationRaymond Queneau was a novelist, poet, and co-founder of Oulipo who believed that literature could be constructed using mathematical constraints. From his famous phonetic experimen…
Rayo Vallecano: The Working-Class Football Club That Challenges Spanish Political NormsBased in a historic Madrid stronghold, Rayo Vallecano is more than a football team. Its supporters, known as the Bukaneros, maintain a fierce anti-fascist identity, frequently cla…- Rays protrude their jaws from flattened cartilaginous bodiesBatomorphs—rays—are cartilaginous fishes sometimes ranked as superorder Batoidea; Fishes of the World treats them as division Batomorphi. Like sharks they lack true bone. Most are…
RCA was born because the US Navy feared British control of radioAfter the First World War, American naval officers worried that a British-linked company would dominate transatlantic wireless. Their solution was to press General Electric into b…
RCA's Capacitance Electronic Disc was a late, strange gamble in the home video market.This video examines the Capacitance Electronic Disc (CED) system, a late-to-market home video technology from RCA. It explores the company's desperate push to make the format a su…
Reaching orbit means going sideways at nearly 8 kilometres every secondGetting to space is mostly about speed, not height. An orbital rocket must climb to roughly 150 kilometres, then push its cargo sideways at no less than 7,814 metres per second so…
Reaching Sahul required seafaring over 50,000 years agoMaritime history studies human life with the sea—fishing, navies, law, ships, and ocean science—often globally. Rafts may be older than a million years if Homo erectus crossed str…
Reactive armour turns a tank's greatest vulnerability into a defensive weapon against incoming fire.Instead of relying solely on thick steel, reactive armour uses controlled explosions to disrupt incoming projectiles. By sandwiching explosives between metal plates, tanks can def…
Read-only memory spent fifty years learning how to be rewrittenThe Apollo Guidance Computer stored its programs by threading wires through tiny magnetic rings, a memory nobody could change once woven. Early chip-based ROM was just as permanen…
Reading 507 Years in a Clam's ShellHow scientists count the annual growth bands in an ocean quahog (Arctica islandica) shell, how one wild clam from Iceland was dated to 507 years, and why that record is a maximum …
Reading a childhood classic while floating in microgravityExperience a moment of cosmic nostalgia as NASA astronauts aboard the International Space Station share a beloved children's book and answer questions from Earth.
Reading an Animal's Age: Five Methods and Their LimitsHow scientists estimate the ages of named animals, from Greenland shark eye lenses to an albatross's leg band, and the stated limits of each method.
Reading an attack on your worldview can make thoughts of death surfacePatriotic Canadians who read an essay attacking their national values became more likely to complete COFF__ as COFFIN. Psychologists say that is because a worldview, the deep fram…
Reading Chinese carried Cixi from junior concubine to ruler behind the curtainMost Manchu women in the Qing palace could not read Chinese. Cixi could, and an ailing emperor began having her read state papers and write out his instructions. That apprenticesh…
Reading comprehension is a complex mental construction, not just the ability to decode words.Reading comprehension is more than basic literacy; it is a creative, multifaceted process of integrating text with prior knowledge. While decoding characters is essential, true un…
Reading is not just a hobby; it is a vital act of civic duty.Novelist Ann Patchett argues that fostering a culture of readers is a collective responsibility. She explores how literature combats isolation, preserves our capacity for deep foc…
Reading the 17-character code that tells a car's whole backstoryStamped on every modern car is a string of 17 letters and digits that quietly records who built it, where, when and in what order. It never contains the letters I, O or Q, and one…
Reading The Golden Bough turned a sickly Polish philosopher into anthropology's great fieldworkerBronisław Malinowski started out studying mathematics and physics in Kraków. Illness, travel and one book by James Frazer sent him to the Trobriand Islands, where years of living …
Real analysis rebuilds calculus on a gapless number lineUndergraduate and graduate courses use real analysis to make limits, continuity, derivatives, integrals, and series rigorous over the reals and Euclidean space. Completeness—no ho…
Real estate development is the high-stakes art of transforming raw land into functional space.Developers act as the master architects of our built environment, orchestrating complex projects from initial land acquisition to final construction. It is a high-risk, high-rewar…
Real Madrid and Barcelona were once told to share Di StéfanoIn 1953 two Spanish giants both claimed the Argentine striker Alfredo Di Stéfano. A FIFA-appointed mediator proposed a strange compromise: he would alternate seasons, playing one …
Real Velociraptor was turkey-sized, not movie-monster tallVelociraptor—"swift thief"—was a small Asian dromaeosaur living about 75 to 71 million years ago in the Late Cretaceous. Two species are recognised. At roughly 1.5–2.07 m long and…
Real-time broadcasting is reshaping global commerce, entertainment, and the nature of digital intimacy.Livestreaming has evolved from experimental personal broadcasts into a massive economic engine. Beyond gaming and social connection, it now powers retail, professional sports, and…
Real-time computing is not about speed; it is about meeting a strict deadline.Many assume real-time computing means high-performance, but a supercomputer can be slow by these standards. Real-time systems are defined by their ability to guarantee a response …
Real-time physics: simulating complex object deformation as it happensThis video explores a breakthrough in computer graphics that allows for detailed rigid body simulation using Extended Position Based Dynamics, bringing realistic deformation to li…
Realgar: The beautiful, toxic mineral that turns into dust in the lightKnown historically as ruby of arsenic, this vibrant orange-red mineral has been used for centuries as a pigment, medicine, and pesticide. Yet, its beauty is deceptive. Exposure to…