The first Trump administration built long segments of steel wall on Arizona's border. Conservationists fear wildlife will ...

Seismologist Deborah Kilb was wading through California earthquake records from the past four decades when she noticed ...

Federal cuts to the U.S. Geological Survey have prompted fears of losing vital information on earthquake activity and ...

On clear days, looking across the waters of Puget Sound from Seattle, it’s possible to see a wall of snaggle-toothed, ...

UC Davis professor Hugh Safford found the highest living tree in California on a recent hike through the High Sierra.

India’s initiative International Big Cat Alliance has taken a major leap forward, but what is it all about? Here's everything ...