Dec. 10, 2024 — Snow cover in the Sierra Nevada is expected to shrink overall as the climate warms, but avalanche frequency could remain the same or even increase at high elevations. That's bad ...

When the valley receives generous rainfall, treasures, such as geodes and fossils of dimetrodon footprints that are 295 to 272 million years old, begin to wash up. These riches are what many ...

Cubs remain with their mothers for up to four years, and females won't breed again while in the company of their young. The grizzly bear has one of the slowest reproductive rates of all North American ...