Geography

River ice has declined globally over last three decades, new study says

Casualties from tornados: Why do rates vary from region to region?

How do you measure water crises? New scale provides actionable data

Coral reefs require microorganisms to sustain growth, researchers find

Uncertain climate: Caves may offer clues for Southern Great Plains

Depleted seamounts are recovering near Hawaii, new evidence suggests

A new London every seven weeks? Trends point to rapid urban growth

Expedition makes subsurface maps, takes samples in Chilean peatlands