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2050 topics available. Showing 1921-1944 on page 81 of 86.
Oracle is an enterprise software and cloud company known for relational databases, Oracle Cloud Infrastructure, business applications, Java, analytics, security, and technology used by organizations that run mission-critical data and operations.
Opportunity cost is the value of the best alternative given up when a choice is made. It helps explain why economic decisions are not only about money, but also about time, attention, resources, risk, and the options people or societies leave behind.
Ocean currents are organized movements of seawater driven by wind, Earth's rotation, gravity, tides, and differences in temperature and salinity. They move heat, nutrients, carbon, organisms, ships, pollutants, and floating debris, making them central to climate, marine life, weather, and human activity at sea.
The ocean is the vast, connected body of salt water that covers most of Earth, stores heat and carbon, shapes weather, supports marine life, feeds communities, carries trade, and links climate, biodiversity, economies, and coastal safety into one global system.
NVIDIA is a technology company known for graphics processors (GPUs) and accelerated computing platforms used in gaming, data centers, artificial intelligence, robotics, and scientific computing.
Notre-Dame de Paris is the medieval cathedral on the รle de la Citรฉ in Paris, famous for its Gothic architecture, sculpture, stained glass, public memory, 2019 fire, and major restoration that returned it to worship and visitors in December 2024.
Niagara Falls is the famous waterfall system on the Niagara River between the United States and Canada, where Great Lakes water, glacial geology, erosion, hydropower, tourism, and cross-border management converge.
Netflix is a global entertainment technology company that streams films, series, documentaries, games, and live programming to members across many countries, using subscriptions, advertising, personalization, product design, and original content investment to compete for audience attention.
Mount Everest is Earth's highest mountain above sea level, rising on the border between Nepal and Tibet in the Himalayas, where tectonic collision, extreme altitude, glaciers, weather, and human ambition meet.
The Moon landing was the Apollo 11 mission in July 1969, when NASA astronauts Neil Armstrong and Buzz Aldrin landed the lunar module Eagle on the Moon while Michael Collins orbited above in Columbia. It was a technical achievement, a Cold War symbol, a media event, and a lasting story about risk, teamwork, science, and human ambition.
The Mongol Empire was a vast thirteenth- and fourteenth-century empire founded by Genghis Khan after he united Mongol and steppe groups in 1206. Its armies built the largest contiguous land empire in history, linking East Asia, Central Asia, the Middle East, and eastern Europe through conquest, tribute, trade, migration, and administration.
MongoDB is a technology company known for its document database and MongoDB Atlas cloud platform, helping developers store, query, sync, search, analyze, and build applications around flexible JSON-like data models.
Monetary policy is how a central bank influences money, credit, interest rates, and financial conditions to help guide inflation, employment, output, and financial stability. Its tools and goals differ across countries and exchange-rate systems.
The Mona Lisa is Leonardo da Vinci's early sixteenth-century portrait, now in the Louvre, whose subtle expression, atmospheric technique, mysterious identity, theft history, and global reproduction made it one of the most recognized paintings in the world.
Microsoft is a global technology company known for Windows, Microsoft 365, Azure, Copilot, Teams, GitHub, LinkedIn, Xbox, developer tools, cybersecurity, cloud infrastructure, and AI-powered software used by individuals, businesses, developers, and governments.
Microplastics are tiny plastic particles, usually defined as less than five millimeters across, that come from manufactured small plastics and the breakdown of larger plastic waste, spreading through water, soil, air, wildlife, and human environments.
Meta Platforms is the technology company behind Facebook, Instagram, WhatsApp, Messenger, Threads, Meta AI, Quest devices, and Reality Labs, with a business model centered on digital advertising and growing investments in AI infrastructure and immersive technologies.
MercadoLibre is a Latin American ecommerce and fintech company known for its marketplace, Mercado Pago payments, logistics network, merchant services, advertising, credit products, and digital commerce ecosystem across the region.
Mathematics studies patterns, quantities, structures, spaces, change, and uncertainty through precise definitions, symbolic language, logical proof, computation, and models. It is both a creative field of abstract ideas and a practical toolkit behind science, technology, finance, engineering, and everyday decisions.
Market failure happens when private markets do not allocate resources efficiently for society. It can arise from externalities, public goods, monopoly power, incomplete information, coordination problems, or missing markets.
Mangroves are salt-tolerant trees and shrubs that grow where land and sea meet in tropical and subtropical regions. Their roots stabilize shorelines, shelter young marine life, store carbon-rich sediments, and help coastal communities face storms and erosion.
Magna Carta was a 1215 peace agreement between King John of England and rebellious barons. Most of its clauses answered feudal grievances, but later generations turned parts of it into a symbol of limited government, lawful judgment, and the idea that rulers are not above the law.
Madagascar is the large island nation off southeastern Africa whose long isolation, varied habitats, Malagasy societies, endemic species, and conservation challenges make it one of Earth's most distinctive living laboratories of evolution and culture.
Machu Picchu is an Inca site high in the Andes of Peru, built in the 15th century and later abandoned during the upheavals of Spanish conquest. Its terraces, temples, plazas, water channels, and finely fitted stonework reveal Inca engineering, landscape knowledge, sacred geography, and the modern challenges of protecting a world-famous heritage site.
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