Cards starting with A
11,854 cards. Page 189 of 198.
Arsenide minerals are rare metal compounds defined by their unique atomic coordination structuresArsenide minerals are a rare group of compounds where metals bond with arsenic. While often overshadowed by their more common sulfide cousins, these minerals reveal complex atomic…
Arsine is a lethal, invisible gas that once revolutionized forensic science and criminal investigations.Arsine is a colorless, odorless, and highly toxic gas that destroys red blood cells upon inhalation. While it was once considered for chemical warfare, its true legacy lies in the…
Arslantepe: The Ancient Anatolian Mound That Rewrites Early Urban HistoryRising thirty meters above the Turkish plains, Arslantepe—or Melid—is a treasure trove of human history. From its origins in the Chalcolithic period to its role as a Neo-Hittite c…
Art academies replaced guilds and ruled taste for centuriesAcademic art means painting and sculpture shaped by Europe's art academies, from their birth in mid-sixteenth-century Italy to their fade in the early twentieth century. The style…
Art as a defense against the erosion of cultural memoryKayla Briët explores why she creates art to preserve her diverse heritage. This talk examines how creative expression can serve as a vessel for stories that risk being lost to tim…
Art as a vehicle for dialogue in the face of war crimesCan a play actually bridge the chasm between victims of war and the leaders who govern them? Director Adong Judith uses provocative art not just as entertainment, but as a deliber…
Art as testimony: The harrowing drawings of Japanese prisoner campsRebecca Salter RA explores how artists captured the brutal reality of World War II POW camps. These works serve as visceral historical evidence of survival, documenting conditions…
Art Blakey: The Drummer Who Turned Jazz Into a Proving Ground for GenerationsKnown as Thunder for his explosive, polyrhythmic style, Art Blakey did more than define hard bop drumming. For 35 years, he led The Jazz Messengers, a legendary ensemble that func…
Art born from the discarded: the evolution of assemblageWhat happens when the debris of everyday life is elevated to high art? Assemblage transforms found objects—from metal scraps to charred wreckage—into three-dimensional sculptures.…
Art Deco named a style decades after its Paris heydayShort for Arts décoratifs, the look bloomed from 1910s Paris through the 1920s and early 1930s on skyscrapers, liners, jewelry, and radios. The label itself only stuck after a 196…
Art is not a fact of nature, but a social agreement.Why is a canvas with a single stripe of paint considered a masterpiece while a similar object in a hardware store is just a tool? The answer lies in the "art world"—a complex netw…
Art is rarely just a solo act; it is a powerful engine for community.We often view art as individual expression, but it frequently serves as a foundation for collective identity. This video explores how diverse groups, from Alaskan communities to g…
Art is the most ancient language we already speakExplore how Wangechi Mutu uses found materials and mesmerizing structures to unearth deep-rooted emotions and celebrate the historical role of women.
Art may be older than Homo sapiens alone can claimUndisputed figurative sculpture from Hohle Fels is about 40,000 years old—but Neanderthal cave marks in Spain date to 64,800 years, and a 2018 South African find pushed the earlie…
Art Nouveau grew from plant curves and iron glassAn international decorative wave of the 1890s chased sinuous stems, whiplash lines, and open spaces built from iron, glass, ceramics, and later concrete. Brussels houses by Victor…
Art without a script: the chaotic rise of the 'happening'In the late 1950s, artists began abandoning plots and predictable endings for something far more volatile. By inviting the audience to step onto the stage and embracing pure chanc…
Art's Concept: Was Skill Always the Measure of Value?The very idea of 'art' differs significantly across cultures. For some traditions, artistic merit wasn't about individual genius, but about something far more deeply rooted in com…
Artaud's meningitis diagnosis at five was probably wrongBorn in Marseille on 4 September 1896 to first-cousin parents with Smyrna roots, Antonin Artaud became a cross-media French artist of page and stage. Biographer David Shafer doubt…
Artaxerxes II: The Persian King Who Ruled Through Greek Discord Rather Than Imperial StrengthKnown as Mnemon, or the mindful, Artaxerxes II navigated a reign defined by internal rebellion and shifting alliances. While he successfully maintained the Achaemenid Empire, his …
Artem Chigvintsev is the only professional dancer to win both Strictly and Dancing with the StarsBorn in the Soviet Union, Artem Chigvintsev rose to international prominence as a master of Latin dance. After a triumphant debut on the UK's Strictly Come Dancing, he transitione…
Artem Dzyuba: The Controversial Striker Who Redefined Russian Football Scoring RecordsArtem Dzyuba retired in 2026 as the most prolific goalscorer in Russian football history. From his debut at Spartak Moscow to his final stint at Akron Tolyatti, his career was def…
Artemis I: How NASA tested the limits of deep space travelNASA's Artemis I mission marked a pivotal step in human space exploration. This video chronicles the journey of the Orion spacecraft, detailing its record-breaking flight and the …
Artemis II astronauts discuss their historic lunar mission while returning to EarthAs the Artemis II crew nears their return to Earth, they host a live news conference from the Orion spacecraft. This briefing offers a rare, mid-flight perspective on a mission th…
Artemis II astronauts visit the European teams behind their historic lunar missionFollowing their mission, the four Artemis II astronauts traveled to the Netherlands to meet the engineers who supported their flight. This visit highlights the international colla…
Artemis II returns to Earth, setting a new record for deep space travel.Following a 10-day mission, the Artemis II crew has safely splashed down in the Pacific Ocean. This briefing covers the mission's key achievements, including breaking distance rec…
Artemis II will send four astronauts on a historic ten-day lunar flyby mission.NASA's upcoming Artemis II mission marks the first time in over five decades that humans will travel to the Moon. This animation details the mission's trajectory, from launch to s…
Artemis II: A historic mission nearing its conclusion in the Pacific OceanFollowing the April 1, 2026 launch, the Artemis II crew is preparing for their return to Earth. This briefing covers the mission's major milestones, including manual flight tests …
Artemis II: The First Human Journey Beyond Low Earth Orbit in Over Fifty YearsIn April 2026, four astronauts ventured further from Earth than any humans in history. By looping around the Moon and returning safely, they validated the Orion spacecraft and the…
Artemis III will test lunar landers in Earth orbit instead of landing on the MoonOriginally planned as the first crewed lunar landing since 1972, Artemis III has been repurposed as a complex risk-reduction mission. Instead of heading to the Moon, the crew will…
Artemis protected children and midwives, yet Greek myth made her fearsomeThe Greek goddess of the hunt also watched over childbirth, young girls and animal cubs. Her temple at Ephesus ranked among the Seven Wonders of the Ancient World. Yet in tragedy …
Artemis: The Complex Greek Goddess of the Hunt, Wilderness, and Eternal MaidenhoodArtemis occupies a unique space in Greek mythology as a protector of young girls and a deity of both the wilderness and childbirth. This overview explores her origins as the daugh…
Arterial stiffness feeds back to worsen blood pressure and organ strainA review of research on hypertension describes arterial stiffness as more than a side effect of ageing blood vessels: it was linked to increased pulsatile strain on the brain, kid…
Arteries were once thought to carry air, not bloodAncient Greek writers found empty arteries in cadavers and linked them to the windpipe—artēría once named the airway. Herophilos separated vessel types; only William Harvey in the…
Arteriosclerosis is the slow stiffening of the body's blood pipesThe word comes from Greek for artery and hardened, and that is the core of it. Artery walls thicken, stiffen and lose their stretch, gradually squeezing the flow of blood to organ…
Artery-clogging plaque often starts in childhood and stays silent for decadesAutopsies of 300 American soldiers killed in Korea, average age just 22, found visible coronary artery disease in more than three quarters of them. Atherosclerosis begins young, h…
Arthritis means joint cartilage worn until bone grindsPain and stiffness follow; swelling, warmth, and lost motion often join. Osteoarthritis tops the list at over 3.8 percent of people, rheumatoid arthritis about 0.24 percent—yet in…
Arthropods own more than eighty percent of animal speciesPhylum Arthropoda—jointed-leg animals with chitinous exoskeletons, segmented bodies, and paired limbs—holds estimates from about one point seventeen million to five or ten million…
Arthur Cayley wrote hundreds of maths papers while working as a London lawyerFor fourteen years Arthur Cayley earned his living drawing up property deeds, and in his spare hours produced between two and three hundred mathematics papers. He and his friend J…
Arthur Conan Doyle’s first Sherlock Holmes novel was a commercial failure that sold for £25Published in 1887, A Study in Scarlet introduced the world to Sherlock Holmes and Dr. Watson. Despite launching the most famous detective duo in literature, the book initially att…
Arthur Griffith: The Architect of Irish Independence Who Was Almost Erased From HistoryArthur Griffith founded Sinn Féin and led the negotiations for the Anglo-Irish Treaty, yet he remains a polarizing and often overlooked figure. From his early, virulent antisemiti…
Arthur Guinness signed a 9,000-year lease on his Dublin breweryOn 31 December 1759, Arthur Guinness took over an unused brewery at St. James's Gate in Dublin on a lease running 9,000 years, at £45 a year. The site grew into one of the biggest…
Arthur Hailey turned meticulous industrial research into a global literary empire of best sellersBefore he became a titan of commercial fiction, Arthur Hailey was a pilot and trade magazine editor. He pioneered a formula of placing ordinary people into extraordinary industria…
Arthur Koestler: From Communist Party insider to anti-totalitarian voice and death-row survivorBorn in Budapest, Arthur Koestler lived a life defined by radical shifts. He was a committed communist who witnessed Soviet famine, a death-row prisoner in Spain, and eventually a…
Arthur Lee: The visionary behind Love and the architect of a psychedelic masterpieceBefore he became a cult icon, Arthur Lee was a Memphis-born prodigy who shaped the sound of 1960s Los Angeles. As the leader of the band Love, he crafted the legendary album Forev…
Arthur M. Schlesinger Sr. shifted the focus of American history from leaders to society.Before Arthur M. Schlesinger Sr., history textbooks largely ignored the contributions of the common person. By championing social and urban history, he moved the spotlight away fr…
Arthur Meighen: The brilliant orator who became Canada's most polarizing political figureArthur Meighen was a formidable intellect and a master of debate, yet his career was defined by bitter rivalries and electoral misfortune. As Canada's ninth prime minister, he nav…
Arthur Miller’s The Crucible used 17th-century witch trials to critique 1950s American political paranoia.When Arthur Miller premiered The Crucible in 1953, he wasn't just retelling the 1692 Salem witch trials. He was crafting a blistering allegory for McCarthyism, where the fear of c…
Arthur Mitchell shattered the color barrier in ballet, proving that excellence knows no race.In 1957, George Balanchine shocked the dance world by pairing Arthur Mitchell, a black dancer, with Diana Adams, a white ballerina, in the ballet Agon. Despite the era's intense r…
Arthur Rimbaud’s A Season in Hell: A Poet’s Final, Failed Attempt at Spiritual AlchemyPublished in 1873, A Season in Hell is the only work Arthur Rimbaud ever personally released. It serves as a spiritual autobiography, documenting his attempt to reach the unknown …
Arthur Saint-Léon was a virtuoso dancer, violinist, and the visionary behind Coppélia.Before he became a legendary choreographer, Arthur Saint-Léon was a celebrated dancer who performed alongside his wife, Fanny Cerrito. A true polymath, he famously played the viol…
Articulation is the musical equivalent of speech, defining how every single note is sounded.Beyond just pitch and rhythm, articulation dictates the life cycle of a note. It shapes the attack, decay, and timbre, acting as the bridge between a written score and a living pe…
Artificial gravity is not just a sci-fi switch, but a complex engineering challenge.In movies, astronauts walk through spacecraft as if they were on Earth. In reality, creating artificial gravity is a complex hurdle for long-duration missions. Scientists are inve…
Artificial intelligence achieves a landmark victory in the complex world of Dota 2Witness a historic moment in machine learning as OpenAI Five secures a 2-0 victory against the reigning world champions of Dota 2, proving that AI can master high-level strategic …
Artificial intelligence faces the challenge of learning new tasks without forgetting old onesResearchers who review the field of continual learning found that intelligent systems must incrementally acquire and exploit knowledge throughout their lifetimes. However, these s…
Artificial intelligence is accelerating the creation of custom proteins to solve global challenges.Protein engineer César Ramírez-Sarmiento explains how AI is revolutionizing the design of new proteins. This talk explores how these tools can address critical biomedical and envi…
Artificial intelligence is no longer science fiction in the pharmaceutical development processArtificial intelligence is actively being used to assist in the creation of new pharmaceuticals. This video explores how researchers are integrating advanced technology into drug …
Artificial intelligence is now discovering entirely new materials for the next generation of batteriesFor two centuries, battery innovation relied on slow, costly trial and error. Now, AI is accelerating discovery by simulating new crystal structures, optimizing electrode design, …
Artificial Intelligence is reshaping global industry, yet its actual impact on revenue remains debated.From optimizing agricultural yields to generating entire films, artificial intelligence is rapidly integrating into professional life. While some sectors report significant produc…
Artificial intelligence is streamlining the identification of human remains through dental analysisA scoping review of 28 research papers found that artificial intelligence is becoming a vital tool for forensic odontology. By automating the analysis of dental records, these tec…
Artificial intelligence took center stage during Big Brother 26's high-stakes summer seasonIn the twenty-sixth season of the American reality phenomenon Big Brother, contestants faced more than just each other. An artificial intelligence theme permeated the house, featu…
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