An Alaskan volcano that has been inactive for more than 100 years is showing signs of rumbling, according to scientists.

Hawaiian Volcano Observatory field engineers on July 10, 2025, visited monitoring stations downwind of the Kīlauea summit ...

Located roughly 140 miles southwest of Anchorage, Iliamna has been dormant for over a century. But on June 15, the Alaska ...

A rare Triassic fossil site reveals North America's oldest known pterosaur, Eotephradactylus mcintireae, in what was once a ...

Scientists have unearthed in Arizona fossils from an assemblage of animals, including North America's oldest-known flying reptile, that reveal a time of transition when venerable lineages that were ...

Yellowstone National Park's geological history is one of the most intensely studied in North America. A new geologic unit ...