Intellect PlusCards starting with A
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Aeschines of Sphettus: The Socratic disciple whose voice was nearly lost to historyA follower of Socrates who wrote dialogues as compelling as Plato's, Aeschines of Sphettus was once a celebrated intellectual. Today, his work survives only in fragments and citat…
Aeschylus' Suppliants was once thought to be his earliest work, but it is actually late.Long considered the oldest surviving play by Aeschylus due to its heavy reliance on choral lyrics, modern evidence reveals The Suppliants was written near the end of the playwrigh…
Aeschylus' The Persians is the oldest surviving play in the history of Western drama.Written in 472 BC, this ancient Greek tragedy offers a rare perspective: it depicts the Persian defeat at the Battle of Salamis from the viewpoint of the enemy. It remains a power…
Aesop on perseverance“Slow but steady wins the race.” (Aesop, Aesop's Fables)
Aestivation is summer's version of hibernation, and snails, frogs and even lemurs do itHibernation gets all the attention, but plenty of living things sleep through summer instead. When heat and drought set in, snails glue themselves shut, frogs wrap up in mucus coc…
Aether was the personification of the bright upper sky in ancient Greek mythology.Beyond the physical atmosphere, Aether held a complex role as a primordial deity. Depending on the tradition, he was either the son of darkness and night or the offspring of time …
AEW's Redemption event marks a historic first for the promotion in Montreal, CanadaIn July 2026, All Elite Wrestling brought its inaugural Redemption pay-per-view to the Bell Centre in Montreal. The event featured eleven high-stakes matches, including a headline…
Afar: The Afroasiatic language that bridges three nations across the Horn of AfricaSpoken by over 2.6 million people, Afar is a vital Cushitic language native to Djibouti, Eritrea, and Ethiopia. While it maintains a rich oral tradition, its modern identity is de…
Afeni named Tupac for global revolutionaries, not a block aloneTupac Shakur (1971–1996), also 2Pac and Makaveli, was born in East Harlem to Black Panther parents and raised by mother Afeni, who wanted a name tied to indigenous revolutionaries…
Affine geometry is the study of parallel lines without measuring distance or angles.Imagine stripping away the rulers and protractors from geometry. What remains? Affine geometry ignores metric notions like length and angle, focusing instead on the fundamental pr…
Affine transformations keep straight lines straight and parallel lines parallelStretch, slide, rotate, reflect or shear a drawing, and lengths and angles may change, but straight lines stay straight and parallel lines never meet. That guarantee defines an af…
Afghanistan was the ancient world’s roundaboutOn the Silk Road, this land sat where empires crossed. Paleolithic tools and a Neanderthal bone fragment suggest people here by about 52,000 years ago. Ahmad Shah Durrani’s 1747 e…
Afghanistan's last king reigned 40 years without signing a political death warrantMohammad Zahir Shah took the throne at 19 after his father was assassinated, and held it for almost four decades, longer than any Afghan ruler since the Durrani Empire began in th…
Afghanistan’s opium trade is collapsing, but a more dangerous synthetic market is risingOpium poppy cultivation in Afghanistan has plummeted by 20 percent in just one year, marking a sharp departure from the country's long-standing status as a global drug hub. As far…
Aflatoxin was unmasked by a mystery disease killing English turkeysIn 1960, young turkeys across England were dying of a mystery illness dubbed Turkey X disease. The culprit turned out to be a poison made by a common mould growing on peanut feed.…
Africa has officially entered the era of the supertall skyscraper in the desert.This video examines the construction of Africa's first supertall skyscraper, a landmark project located in Egypt's new administrative capital. It provides a look at the scale and …
Africa holds the world's oldest record of human technological and mathematical achievement.From the earliest stone tools crafted 3.3 million years ago to sophisticated geometric traditions and advanced astronomical observations, Africa’s scientific history is vast. Ofte…
Africa is building a massive, continent-spanning high-speed rail network to boost economic tradeThe African Union’s Agenda 2063 aims to connect all African capitals with a modern, high-speed rail network. By replacing nine different rail gauges with a single standard, the pr…
Africa is building an 8,000km living wall to stop desertification and transform millions of lives.Spanning the Sahel from Djibouti to Senegal, the Great Green Wall is an ambitious African-led initiative to restore degraded landscapes. Originally conceived as a simple tree-plan…- Africa is home to thousands of languages, from ancient clicks to colonial legaciesWith estimates ranging from 1,250 to over 3,000 distinct languages, Africa holds some of the world's greatest linguistic diversity. While major families like Niger-Congo and Afroa…
Africa is not a monolith: exploring the continent's profound and diverse cultural tapestryAfrica is the birthplace of humanity, yet its cultural identity is often flattened by external labels. From the savanna kingdoms of the west to the Bantu-speaking societies of the…
Africa is not just adopting AI, it is rewriting the global playbook entirely.Hardy Pemhiwa argues that Africa is bypassing traditional AI adoption models. By leveraging a young population and massive mobile connectivity, local entrepreneurs are deploying a…
Africa is now home to more Christians than either Europe or Latin America.Christianity in Africa is not merely a colonial import; it is a deep-rooted, ancient faith that has evolved through centuries of indigenous adaptation. From early monastic traditi…
Africa is the cradle of humanity and the world's youngest, most biodiverse continent.Spanning 20% of Earth's land, Africa is a continent of profound contrasts. It is the birthplace of the human species, yet holds the world's youngest population. While it faces sig…
Africa is warming faster than the global average, triggering unprecedented climate-related humanitarian crises.The African continent is heating up at a rate unseen in the last thirty years. This warming is not just a statistical anomaly; it is driving a surge in extreme weather, from devas…- Africa's banana-eaters flash green and shout go-awayTuracos of family Musophagidae—"banana-eaters," including plantain-eaters and go-away-birds—are nearly unique among birds for being endemic to Africa (mousebirds are another). Sem…
- Africa's coastline is shorter than Europe's despite its massive sizeYou might assume a continent covering one-fifth of Earth's land surface would boast an incredibly jagged, expansive shoreline. However, Africa possesses a paradox: its coast is si…
Africa's expanded path to the 2026 World CupFor the first time, the African continent secured a massive increase in World Cup berths. This shift fundamentally altered the competitive landscape, moving from a high-pressure f…
Africa's football championship began in 1957 with three teams and two matchesThe first Africa Cup of Nations, staged in Khartoum in February 1957, needed only two games to crown a champion. South Africa had been thrown out for insisting on an all-white squ…
Africa's great forest stores three years of global emissionsSecond only to the Amazon, Congolian rainforests cloak more than two million square kilometres across Central Africa—about a quarter of remaining tropical forest worldwide. Peat s…
Africa's largest eagle is a high-speed apex predator currently facing a survival crisis.The martial eagle is a formidable raptor capable of diving at speeds of 230 kilometers per hour to strike prey. Despite its status as an apex predator across sub-Saharan Africa, t…- Africa's largest high roof split by a salt-lake riftLittle of the Ethiopian—or Abyssinian—Highlands falls below 1,500 metres, forming the continent's largest continuous elevated mass from Ethiopia into Eritrea. The Main Ethiopian R…
Africa's largest hydroelectric plant, the Grand Ethiopian Renaissance Dam, is finally fully operational.Spanning the Blue Nile, this massive gravity dam is designed to power Ethiopia's energy future. While it promises to transform the region's electricity supply, the project has spa…
Africa's largest rainforest reserve remains a mysterious, river-bound sanctuary for rare wildlifeDeep within the Congo River basin lies Salonga National Park, a sprawling 36,000-square-kilometer wilderness. Largely inaccessible by road, this massive rainforest reserve serves …
Africa's lowest point is a shimmering, hypersaline crater lake of white gold.Lying 155 meters below sea level in the Danakil Desert, Lake Assal is a geological marvel. This hypersaline crater lake, with salt concentrations far exceeding the Dead Sea, serve…
Africa's oldest Portuguese capital on a foggy dry coastLuanda is Angola’s capital, chief Atlantic port, and largest city—over 8.8 million people in 2024, about a third of the nation. Paulo Dias de Novais founded São Paulo da Assunção …
Africa's past runs deeper than colonial maps admitModern humans emerged in East Africa some 300,000 to 250,000 years ago; archaic relatives had already left far earlier. From Egypt and Kerma to Mali, Aksum, and Great Zimbabwe, th…
Africa's prehistoric stone tool traditions reveal a continent of deep, localized innovation and complexity.Long before the rise of ancient civilizations, Africa was home to sophisticated toolmaking cultures. From the earliest pebble tools in Kenya to the specialized blade complexes of …- Africa's rift lakes shelter more than 1,500 species of cichlid fishStrung along the East African Rift, the African Great Lakes include Victoria, the world's second-largest freshwater lake by area, and Tanganyika, second-largest by volume and dept…
Africa's secretarybird is an eagle on crane legs that stamps snakesThe secretarybird Sagittarius serpentarius is a large, mostly terrestrial African raptor of open grasslands. An eagle-like body on crane-like legs can lift it to about 1.3 metres;…
Africa's smallest wild cat can kill 14 animals in a single nightThe black-footed cat weighs barely two kilograms and stands under 25 centimetres at the shoulder, yet it is a formidable night hunter. Radio-tracked individuals roam up to 16 kilo…
Africa's snowy Mountains of the Moon are losing their glaciers fastStraddling the equator between Uganda and Congo, the Rwenzori carry permanent snow and ice, and explorers once matched them to Ptolemy's legendary Mountains of the Moon at the Nil…
Africa's toughest mustelid wears armour of loose skinThe honey badger, or ratel, ranges from sub-Saharan Africa through Arabia to India as the only living Mellivorinae. Loose hide lets it twist inside its own skin, neck skin reaches…
Africa's tsetse folds its wings like stacked bladesTsetse—genus Glossina, in their own family—are large biting flies across much of tropical Africa and parts of the Arabian Peninsula. Twenty-three living species are known; fossils…- Africa’s biggest economy sits on a 2,798-kilometre shoreSouth Africa, the continent’s southernmost state, wraps about 2,798 kilometres of Atlantic and Indian Ocean coast around nine provinces and more than 63 million people—Africa’s si…
- Africa’s deepest lake is also Earth’s longest freshwater trenchLake Tanganyika ranks second only to Baikal in freshwater volume and depth, yet stretches farther than any other freshwater lake. Shared by Tanzania, the Democratic Republic of th…
Africa’s eastern horn was Rome’s land of aromaticsThe Horn of Africa—also the Somali Peninsula—is mainland Africa’s easternmost projection and the world’s fourth-largest peninsula. Geographically it comprises Somalia, Djibouti, E…
Africa’s famous cape is not actually the continent’s tipThe Cape of Good Hope is a rocky Atlantic headland on South Africa’s Cape Peninsula—not the continent’s southernmost point, which is Cape Agulhas about 150 kilometres farther east…
Africa’s free-standing roof was renamed Freedom PeakMount Kilimanjaro in Tanzania stands 5,895 metres above sea level and about 4,900 metres above its plateau—Africa’s highest mountain, the world’s highest free-standing peak, the E…
Africa’s giant hosts 250 peoples and a Nok beginningNigeria, between the Sahel and the Gulf of Guinea, covers 923,769 square kilometres and holds more than 242 million people, making it Africa’s most populous country and sixth worl…- Africa’s largest lake lives mostly on rainfall, not riversLake Victoria covers about 59,947 square kilometres: Africa’s largest lake, the world’s largest tropical lake, and second only to Superior among freshwater surfaces. Tanzania hold…
- Africa’s last absolute monarchy rebranded its English nameEswatini is a landlocked Southern African kingdom wrapped by South Africa except where Mozambique touches the east. Swazi kings built the realm in the mid-eighteenth century under…
Africa’s oldest known boat was dug from Nigerian clayNear Lake Chad’s edge, the Dufuna canoe dates to about 6300 BC—the oldest boat yet found in Africa and the second oldest worldwide. Long before oil or independence, the land that …- Africa’s only Hindu-majority country sits east of MadagascarMauritius, an Indian Ocean republic roughly 2,000 kilometres off southeastern Africa east of Madagascar, includes the main island plus Rodrigues, Agaléga, and St. Brandon. It is A…
Africa’s only hydraulic empire taxed rivers into powerOn the Horn of Africa the Ajuran Sultanate rose in the thirteenth and fourteenth centuries and, by the fifteenth, ran what sources call Africa’s only hydraulic empire—dykes, dams,…- Africa’s only Spanish-speaking country got rich—unevenly—on oilEquatorial Guinea, 28,000 square kilometres of Central African mainland Río Muni plus Bioko and Annobón islands, is Africa’s sole Hispanic state. Pygmy and later Bantu settlers pr…
Africa’s second summit named a whole country KenyaMount Kenya, just 16.5 kilometres south of the equator and about 150 kilometres north-northeast of Nairobi, is Africa’s second-highest mountain. Batian tops 5,199 metres, Nelion 5…- Africa’s second-largest country is still nicknamed the CongoThe Democratic Republic of the Congo—Congo-Kinshasa, once Zaire—covers Central Africa as the continent’s second-largest country and the world’s eleventh, with roughly 124 million …
- Africa’s smallest country was empty until Europeans stayedSeychelles scatters 115 Indian Ocean islands about 1,500 kilometres east of mainland Africa, with its capital at Victoria. Roughly 100,600 people in 2022 make it Africa’s least po…
- Africa’s surging megacity built between lagoon and seaLagos, southwestern Nigeria’s port metropolis, was estimated in November 2025 at roughly 17 to 21 million people—the country’s largest city, Africa’s most populous urban area, and…