Intellect PlusCards starting with D
3,445 cards. Page 43 of 58.
Divergence measures how much a flow swells or shrinks at a pointWarm a pocket of air and it expands in every direction, so arrows describing its motion all point outward. Mathematicians capture that outward push with a single number called div…
Divers found a 2,000-year-old computer in a Greek shipwreck.In 1901, sponge divers pulled a lump of corroded bronze from a Roman-era wreck off the Greek island of Antikythera. Hidden inside were dozens of interlocking gears. The device cou…
Divers found medieval Mongol bombs in a shipwreck off JapanWhen Mongol fleets attacked Japan in the 13th century, they brought thunder-crash bombs: iron shells packed with gunpowder. Centuries later, underwater archaeologists recovered so…
Divers have captured the first in situ images of a rare Indonesian coelacanthLong considered an elusive deep-sea phantom, the Sulawesi coelacanth has finally been documented in its natural habitat by human divers. Using technical diving gear, researchers o…
Divers off Dwarka found walls, a jetty and anchors beneath the seaLegend says Krishna reclaimed land from the sea to build Dwarka, a fortified city of gates on India's western coast. Underwater surveys by the Archaeological Survey of India have …
Diverse crops and organic matter can partially replace nitrogen fertilizersA meta-analysis of 30 long-term experiments across Europe and Africa found that ecological intensification practices—such as increasing crop diversity and adding organic matter—ca…
Diverse IoT data sets are needed to train reliable security systemsResearchers evaluating Internet of Things (IoT) security found that current network intrusion data sets often lack the variety needed for real-world use. By analyzing a new data s…
Diverse organisms use similar organic solutes to survive water stressResearchers observing various life forms found striking convergent evolution in how organisms manage water stress. A review of bacteria, plants, and animals revealed that most spe…
Diverse personality traits may actually reflect a single stable dimension of negative affectivityResearchers who reviewed various personality scales found that traits like neuroticism and trait anxiety are likely different ways of measuring the same underlying, pervasive char…
Diverse strategies are needed to help agriculture adapt to climate changeA scoping review of sixty-five studies found that agricultural adaptation requires a wide range of interventions. Researchers identified strategies spanning from local crop manage…
Diverticulitis hurts on the left in Europe but usually on the right in AsiaSmall pouches in the wall of the large intestine are common in Western countries and rare in rural Africa. When they become inflamed, the result is diverticulitis. Oddly, where th…
Divide and conquer is the secret to solving the world's most complex computational problems.By recursively breaking massive tasks into smaller, manageable pieces, this algorithmic paradigm transforms impossible challenges into efficient solutions. From sorting data to mu…
Divided by war and defined by mountains, this province is South Korea's rugged frontier.Gangwon State is a land of extremes, home to South Korea's least populated regions and its highest peaks. Once a unified province, it was split by the 38th parallel in 1945 and re…
Divine right made kings answerable to God alone, and it was newer than it soundsThe idea that a monarch answers only to heaven feels ancient, yet in Europe it hardened only after the Reformation. Medieval kings could be excommunicated and even deposed by the …
Divine was the Godzilla of drag, a countercultural icon who defied mainstream expectations.Born Harris Glenn Milstead, Divine transformed from a bullied teenager into a global cult legend. Through his collaboration with filmmaker John Waters, he pioneered a brand of tra…
Diving in a suit of armor that defies ocean pressureImagine descending into the crushing depths of the ocean without feeling the weight of the water. Atmospheric diving suits allow humans to reach 2,300 feet while maintaining surfa…
Division is not commutative, and order changes the answerDivision splits a dividend by a divisor to yield a quotient. Share 20 apples among 4 people and each gets 5; divide 21 among 4 and 1 remains. Unlike multiplication, swapping numbe…
Diwali peaks on the darkest night, and four faiths light it differentlyIts name means a row of lamps, and its climax falls on a new moon, the blackest night of the lunar month. Hindus remember Rama's homecoming, Jains mark Mahavira's final liberation…
Dixie Dean scored 60 league goals in one season, a record that still stands today.In the 1927–28 season, Everton striker Dixie Dean achieved the impossible: 60 league goals in just 39 appearances. A master of aerial play and a gentleman on the pitch, he never r…
Dixieland jazz is less a fixed genre and more a shifting musical conversationOften associated with the New Orleans sound, Dixieland is a complex, evolving style that defies simple categorization. While frequently defined by polyphonic improvisation, its hi…
Diyarbakır: A Ten-Thousand-Year-Old City Caught in the Crossfire of Modern IdentityInhabited since 8,000 BCE, this ancient fortress city on the Tigris has been a crossroads for empires, from the Romans to the Ottomans. Today, it stands as the informal capital of…
Djed Spence waited 881 days for his first Tottenham startTottenham paid a reported 20 million pounds for Djed Spence in 2022, and manager Antonio Conte promptly called him a club investment rather than his own choice. Four loan spells a…
Djelfa: An Algerian Crossroads of Ancient Rock Art, Roman Ruins, and Nomadic TraditionsNestled in the Ouled Naïl Range, Djelfa serves as a vital transition point between Algeria's high plateaus and the Sahara. This historic city, founded as a French military post in…
Djenné: The ancient Malian city built from the earth and defined by its floodsInhabited since 250 B.C., Djenné stands as a masterpiece of earthen architecture in sub-Saharan Africa. Located on a floodplain in Mali, the town transforms into an island during …
Djerba: The North African Island Where Ancient Jewish and Muslim Traditions CoexistOff the coast of Tunisia lies Djerba, a 514-square-kilometer island with a history stretching back over 20,000 years. Once speculated to be the mythical home of the lotus-eaters, …
Djibouti City: The Strategic Peninsula That Became a Modern Red Sea CrossroadsFounded on a barren coast in 1888, Djibouti City transformed from a French colonial outpost into a vital maritime gateway. Today, this cosmopolitan capital serves as the primary e…
Djuna Barnes: The Modernist Recluse Who Turned Her Traumatic Family History Into High ArtDjuna Barnes was a central figure of early 20th-century modernism, known for her acerbic wit and the cult classic Nightwood. Yet, behind her literary fame lay a life defined by a …
Dmitri Prigov: The Soviet conceptualist who wrote 36,000 poems on tin cansDmitri Prigov was a titan of the underground, a sculptor-turned-poet who navigated the absurdity of the Soviet era by turning everyday objects into canvases. From psychiatric dete…
Dmitry Merezhkovsky: The Russian Intellectual Who Tried to Reconcile History and FaithDmitry Merezhkovsky was a pivotal Russian thinker who bridged the gap between literature and religious philosophy. Known for his historical novels and critical studies, he became …
Dmitry Ustinov: The Soviet Kingmaker Who Built the USSR's Massive Military-Industrial ComplexDmitry Ustinov was the architect of the Soviet Union's immense military power, rising from a working-class engineer to the nation's Defence Minister. A hardline strategist who fav…
DMX: The Rapper Who Made History by Debuting Five Consecutive Albums at Number OneEarl Simmons, known as DMX, transformed hip-hop with his aggressive delivery and raw, personal storytelling. He remains the only artist to debut his first five studio albums at th…
DNA barcoding reveals ten hidden species within a single butterfly speciesResearchers studying the neotropical skipper butterfly Astraptes fulgerator found that what was once thought to be one widespread species is actually a complex of at least ten dis…
DNA is not just a double helix; it can adopt many different shapes.While the double helix is the most famous depiction of DNA, the molecule is surprisingly versatile. This video explores how DNA can shift into alternative structures under specifi…
DNA is not the only architect of the living bodyWe often view DNA as the sole blueprint for life, but it is only one part of the construction crew. Biologist Michael Levin reveals a mysterious bioelectric layer that directs cel…
DNA ligase is the essential molecular glue that keeps our genetic code from unraveling.Without DNA ligase, the blueprint of life would be a collection of broken fragments. This remarkable enzyme acts as a biological adhesive, sealing breaks in the double helix to en…
DNA now ties Danube Avars to ancient Northeast Asian migrantsPannonian Avars—distinct from Caucasian Avars—were a Eurasian nomad confederation that settled the Carpathian basin. Byzantine writers called them Pseudo-Avars or Varchonitai; Rus…
DNA replication must navigate the geometric constraints of double helicesDNA is synthesized in opposite directions, creating a logistical puzzle for the cell. This video breaks down how enzymes coordinate to replicate both strands simultaneously, ensur…
DNA sequencing is the blueprint for life, revealing the code that builds every organism.DNA sequencing is the laboratory technique used to determine the exact order of nucleotides in a DNA molecule. By reading these four chemical bases—adenine, thymine, cytosine, and…
DNA showed Himalayan Skeleton Lake holds people who died a thousand years apartA shallow Himalayan lake at over 5,000 metres gives up hundreds of skeletons each summer when its ice melts. For decades everyone assumed a single deadly hailstorm had killed a ro…
DNA stores, proteins work, RNA does a bit of both: life's giant moleculesEvery living thing depends on three long chain molecules, each shaped for a different job. DNA is built for safekeeping, proteins for getting chemistry done, and RNA sits awkwardl…
DNA studies swelled the primrose family to nearly 2,800 speciesThe primrose takes its name from Latin for little first of spring, one of the earliest blooms of the year. Its family, Primulaceae, once seemed tidy. Then molecular studies reshuf…
DNA tests found most beefalo contain no detectable buffalo at allBeefalo is sold as a cattle-bison hybrid, officially three-eighths bison. Yet when geneticists sequenced 47 animals in 2024, including samples from the founding herd, 39 showed no…- DNA was found in 1869 and ignored as the stuff of heredity for decadesFriedrich Miescher pulled a strange substance out of cell nuclei at Tübingen in 1869 and called it nuclein. Seventy-five years passed before an experiment showed it carried geneti…
- DNA's double helix has a wide groove where proteins read the codeTwist two strands of DNA around each other and the gaps between them form grooves of unequal size, 22 and 12 ångströms across. The wider one leaves the edges of the bases exposed,…
Dnieper capital that once ruled Kievan Rus’Kyiv, Ukraine’s capital and largest city, straddles both banks of the Dnieper in the country’s north-centre. In January 2022 it counted 2,952,301 residents—Europe’s seventh-most p…
Dnipropetrovsk Oblast: The Industrial Heart of Ukraine and a Land of Ancient TradeSpanning the Dnieper River, this vital Ukrainian province is a powerhouse of iron ore mining and steel production. Beyond its modern industrial might, the region holds a deep hist…
Do all animals really only get one billion heartbeats in a lifetime?This video investigates the heartbeat hypothesis, which suggests a finite limit on the number of heartbeats an animal experiences. It explores the biological scaling principles be…- Do all mammals really share a fixed budget of one billion heartbeats?This video examines the scientific debate surrounding the idea that mammals are limited to roughly one billion heartbeats in a lifetime. It explores the mathematical foundations o…
Do all wasps possess the ability to exert mind control over their prey?Explore the specialized biology of emerald wasps with Museum scientist Dr. Gavin Broad. This video investigates the reality behind wasp mind control and highlights the vast scient…
Do ancient Near Eastern military codes still define our modern understanding of justice?Rory Cox investigates the earliest foundations of military ethics. By examining how ancient societies navigated the tension between violence and morality, he questions whether con…
Do androids mirror our own humanity, or are we simply becoming mechanical ourselves?In Philip K. Dick’s 1968 novel, Earth is a radioactive wasteland where owning a real animal is a luxury and androids are indistinguishable from humans. As bounty hunter Rick Decka…
Do animals actually exercise, or is that a uniquely human pursuit?We often think of exercise as a deliberate human activity, but do animals engage in similar behaviors? This video explores how we define exercise and examines whether animals perf…
Do animals experience grief when they lose a member of their group?This video examines whether animals mourn their dead, specifically highlighting the behavior of chimpanzees toward their deceased infants. It explores the scientific inquiry into …
Do animals experience grief when they lose a member of their social group?When an orca named Tahlequah carried her deceased calf for 17 days, it sparked a debate: was she mourning, or simply confused? This video examines whether nonhuman animals possess…- Do animals experience the searing pain of grief and love?Biological anthropologist Barbara J. King examines evidence that diverse species, from orcas to ducks, express profound emotions. This exploration challenges us to consider how un…
Do animals feel pain the same way that humans do?While humans can distinguish between a needle prick and a toothache, the internal experiences of other species remain a mystery. This video explores how pain is processed across t…
Do animals possess a hidden pharmacy of plants, insects, and minerals?From chimpanzees chewing bitter leaves to bears rubbing resin into their fur, non-human animals engage in zoopharmacognosy. This is the practice of self-medication, where species …- Do animals possess a sixth sense for predicting impending earthquakes or is it folklore?Reports of animals acting strangely before seismic events are common, but scientific evidence remains elusive. This video examines whether these accounts are grounded in reality o…
Do animals possess an internal compass, and how does human activity disrupt it?Many animals navigate the world using an innate magnetic sense. This video explores the mechanics behind this biological ability and explains how modern human activity is interfer…
Do animals seek a high or just a better snack?From dolphins behaving lethargically near puffer fish to monkeys raiding Caribbean bars, the line between medicinal self-medication and recreational intoxication is blurred. While…