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…
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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.
Flora & Fauna
Largest Ant in the World
If you’ve ever pictured a “big ant” as something the size of a grain of rice, the world’s giants will reset your scale fast. But here’s the reason…
Flora & Fauna
Khudadov Forest, Tbilisi: A Chronicle of History and Change
Khudadov Forest — a forest situated on the left bank of the Mtkvari River in Tbilisi. Perched on a mountain slope in the northern part of the city,…
Explainers & Big Questions
Where is the Lowest Point in the World?
The quest to identify the world's lowest points is a fascinating journey across diverse geographies. From the hypersaline waters of the Dead Sea to the mysterious depths of…
Explainers & Big Questions
Which Country Has the Most Volcanoes?
People ask this a lot—and get different answers. That’s because “most volcanoes” can mean (1) the most volcanoes known to have erupted in the last ~12,000 years (the…
Explainers & Big Questions
Caspian Sea: The Largest Lake in the World
The Caspian Sea sits between the Caucasus and Central Asia and touches Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan. It behaves like a lake, is called a sea, and…
Explainers & Big Questions
What Causes the Change of Seasons?
Each March, the Northern Hemisphere tilts toward the Sun, ushering in spring’s warmth and blossoming life, while the Southern Hemisphere sinks into autumn’s cooler embrace. But beyond these…
Flora & Fauna
What is the Biggest Parrot in the World? Unveiling the Avian Giants
The quest to identify the world's biggest parrot takes us on an exciting journey, examining two particular contenders: the Hyacinth Macaw and the Kakapo. These two species exemplify…
Flora & Fauna
The Biggest Bird in the World
Birds can be compared by body mass, standing height, or wingspan, and those measurements do not point to the same species. Living birds can be measured directly, while…
Explainers & Big Questions
Are the Caucasus Located in Europe or Asia?
The Caucasus sit between the Black Sea and the Caspian Sea, a rugged bridge where empires, languages, and tectonic plates meet. Stretching roughly 750 miles (1,200 kilometers), the…