Explainers & Big Questions
Georgian Grape Varieties
Close your eyes and inhale—the heady scent of fermenting chakvad (must) rising from buried qvevri in sunlit Kakheti. With 525+ indigenous varieties, Georgia isn’t just a wine region—it’s…
Geography hub
Physical Geography
Explore Earth’s physical systems—from mountains and rivers to climate patterns and fragile ecosystems. This hub organizes our best guides to landforms and water, weather and climate, biodiversity, and today’s pressing environmental issues. Start here, then dive into focused subtopics or explore places by continent, country, and city.
Explainers & Big Questions
Oksukon Lake: Salt & Therapeutic Mud
Oksukon Lake (Tajik: Кӯли Оксукон) is a 3.4 sq mi (8.9 km²) salt-mud lake in Tajikistan’s Asht District, Sughd Region, on the right bank of the Syr Darya…
Explainers & Big Questions
Georgian Wine Regions
Major Georgian wine regions include Kakheti, Kartli, Imereti, Racha-Lechkhumi & Kvemo Svaneti, Adjara, Samegrelo, and Guria—each defined by distinct soils, signature grapes, and centuries-old qvevri winemaking traditions. Georgian…
Landforms & Water
Tanganyika: Second Deepest Lake in the World
Imagine plunging over 4,800 feet beneath the surface of a freshwater expanse so vast it spans four countries. Lake Tanganyika holds this spectacular record as the second deepest…
Explainers & Big Questions
Atolls & Coral Formation: Mapping Nature’s Ringed Islands
What is an atoll? An atoll is a ring-shaped coral reef, island, or series of islets encircling a central lagoon, formed as volcanic islands gradually subside and reefs…
Explainers & Big Questions
Kamchatka’s Valley of Geysers, Russia: The World’s Second-Largest Geyser Field
What is the Valley of Geysers? It’s the world’s second-largest concentration of geysers—about 90 active vents packed into a 3.7-mile canyon—fuelled by heat from Kamchatka’s volcanoes. Nestled in…
Explainers & Big Questions
What Is the Largest Desert in the World?
If you picture endless dunes when you hear “desert,” you’re only half right. Some deserts are white with ice, not yellow with sand. The key is dryness, not…
Explainers & Big Questions
Geographical Area: Definition, Types & Examples
When you read that a policy works “in your area,” what is that “area,” exactly? A neighborhood? A county? A river basin? In geography and data analysis, a…
Explainers & Big Questions
12 Facts About Climate Change
In the 1980s, climate change sounded like a far-off problem. Today, school kids, farmers, and coastal city mayors all use the term because they see changes around them.…
Explainers & Big Questions
What is Climate Change?
Climate change is a long-term shift in Earth’s climate system, not just a run of hot days or a bad season. The modern change matters because it is…