Entries starting with M
- Machine learningMachine learning is the branch of computing in which systems improve at a task by finding patterns in data instead of following hand-written rules.
- Madagascar: Geography, History, Wildlife and Key FactsMadagascar is an island nation off East Africa renowned for extreme biodiversity, with the majority of its species found nowhere else on Earth.
- Madrid: History, Geography, Culture and Key FactsMadrid is Spain's capital and largest city, a European political and cultural center known for royal heritage and world-class art museums.
- Malawi: Geography, History, Government and Key FactsMalawi is a landlocked southeastern African nation defined by Lake Malawi, famous for its extraordinary diversity of endemic cichlid fish.
- Malaysia: Geography, History, Economy and Key FactsMalaysia is a Southeast Asian nation split between the Malay Peninsula and Borneo, known for rapid economic growth and the Petronas Twin Towers.
- Maldives: Geography, History, Economy and Key FactsThe Maldives is a low lying Indian Ocean archipelago of coral atolls, known for luxury tourism and its exposure to sea level rise.
- Mali: Geography, History, Government and Key FactsMali is a landlocked West African country in the Sahara and Sahel, historically home to Timbuktu, a major center of Islamic scholarship.
- Malta: Geography, History, Government and Key FactsMalta is a small Mediterranean archipelago nation known for prehistoric megalithic temples and the fortified capital of Valletta.
- Manchester: Birthplace of the Industrial RevolutionManchester is a city in northwest England that became the world's leading center of cotton textile manufacturing during the Industrial Revolution.
- Manila: Geography, History, Culture and Key FactsManila is the capital of the Philippines, a Manila Bay port city that served as the Spanish and American colonial capital in Asia.
- Margin of errorA margin of error shows how far a survey estimate could sit from the true population value simply because only a sample was measured.
- Marrakesh: History, the Medina and Key Facts About Morocco’s Red CityMarrakesh is one of Morocco's four imperial cities, founded by the Almoravids in the mid-11th century.
- Marshall Islands: Geography, History, Government and Key FactsThe Marshall Islands is a Pacific atoll nation known for Cold War nuclear testing at Bikini Atoll and extreme vulnerability to sea level rise.
- Mauritania: Geography, History, Government and Key FactsMauritania is a mostly Saharan West African nation famous for the Richat Structure, a vast eroded geological dome visible from space.
- Mauritius: Geography, History, Culture and Key FactsMauritius is a volcanic Indian Ocean island nation famous for the extinct dodo and the historic refuge of Le Morne Brabant.
- Mecca: Geography, History, Religion and Key FactsMecca is Islam's holiest city, centered on the Kaaba, and the Prophet Muhammad's birthplace and the destination of the annual Hajj.
- Medina: Geography, History, Religion and Key FactsMedina is Islam's second-holiest city, where the Prophet Muhammad is buried, home to the Prophet's Mosque.
- Melbourne: History, Flinders Street Station and Key Facts About Victoria’s CapitalMelbourne is Victoria's capital and Australia's second-largest city, founded in 1835 and transformed by the gold rush.
- Mercator projectionThe Mercator projection is a world map design that keeps compass directions true but makes land far from the equator look much larger.
- Meta-analysisA meta-analysis statistically combines the results of two or more separate studies to produce a single, more precise estimate of an effect.
- MetaphorA metaphor describes one thing as though it were another, transferring its qualities, without using like, as or than.
- MethaneMethane is a colorless gas, the main component of natural gas, and the second largest human-driven contributor to global warming after carbon dioxide.
- Mexico City: Built on the Ruins of TenochtitlanMexico City is the capital of Mexico, built in the 16th century by the Spanish on the ruins of the Aztec capital Tenochtitlan.
- Mexico: Geography, History, Culture and Key FactsMexico is a federal republic in southern North America, home to ancient Maya and Aztec civilization and the Chichen Itza pyramid.
- Mexico: Geography, History, Culture, and Key FactsMexico is a federal republic in southern North America bordering the United States, Guatemala, and Belize, home to roughly 132 million people.
- Miami: History, Geography, Culture and Key FactsMiami is a Biscayne Bay city incorporated in 1896 that became a major Latin American gateway through waves of migration.
- Micronesia: Geography, History, Culture and Key FactsThe Federated States of Micronesia is a four-state island nation in the western Pacific, home to the ancient megalithic site of Nan Madol.
- Milan: Fashion, Finance, and HistoryMilan is northern Italy's financial and fashion capital, a Lombardy city with Roman origins, the Gothic Duomo, and global economic influence.
- Mitochondrial DNAMitochondrial DNA is a small, separate loop of DNA inside a cell's mitochondria, inherited almost entirely from the mother.
- Moldova: Geography, History, Culture and Key FactsMoldova is a landlocked Eastern European country between Romania and Ukraine, known for its ancient winemaking and the cliffside site of Orheiul Vechi.
- Mole (chemistry)A mole is the SI unit of amount of substance: exactly 6.02214076 times 10 to the power 23 entities, such as atoms, molecules or ions.
- MoleculeA molecule is an electrically neutral group of two or more atoms held together as a single unit by chemical bonds.
- Moment magnitude scaleThe moment magnitude scale, written Mw, states an earthquake's size from the slip, fault area and rock rigidity at its source.
- Monaco: Geography, History, Culture and Key FactsMonaco is a tiny, densely populated sovereign city-state on the French Riviera, famous for the Monte Carlo Casino and Grand Prix.
- Monetary policyMonetary policy is the action a central bank takes to influence how much money is in an economy and what it costs to borrow.
- Mongolia: Geography, History, Culture and Key FactsMongolia is a vast, sparsely populated landlocked country between Russia and China, the birthplace of Genghis Khan's Mongol Empire.
- Montenegro: Geography, History, Culture and Key FactsMontenegro is a small, mountainous Adriatic country in the Western Balkans, home to the Bay of Kotor and Our Lady of the Rocks.
- Montreal: Quebec’s Historic Island CityMontreal is the largest city in Quebec, Canada, founded in 1642 as a French Catholic mission on an island in the Saint Lawrence River.
- Morocco: Geography, History, Culture and Key FactsMorocco is a constitutional monarchy in northwest Africa known for its Islamic dynastic history and the Hassan II Mosque.
- MorphemeA morpheme is the smallest meaningful unit in a language, such as dog, the prefix un- or the plural ending -s.
- Moscow: Russia’s Kremlin CapitalMoscow is the capital of Russia, first recorded in 1147 and built around the Kremlin, the historic seat of Russian political power.
- Mozambique: Geography, History, Culture and Key FactsMozambique is a coastal Southern African nation, a former Portuguese colony, and home to the historic Island of Mozambique.
- Mumbai: Geography, History, Culture and Key FactsMumbai, formerly Bombay, is India's financial capital, built on reclaimed islands and home to the Gateway of India.
- Munich: Bavaria’s Historic CapitalMunich is the capital of Bavaria in southern Germany, known for its historic old town, major industries, and Oktoberfest.
- Myanmar: Geography, History, Culture and Key FactsMyanmar is a Southeast Asian country shaped by Theravada Buddhism, military rule, and its most sacred site, the Shwedagon Pagoda.