A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

After adjusting to microgravity—and getting through a few bouts of vomiting—the astronauts got to work in polar orbit.

A 36-foot emaciated sea creature washed up on a California beach, and now researchers want to know how it died. On March 29, the Marine Mammal Center was notified by the National Park Service staff ...

Grizzly bears, for example, are a subspecies of brown bear found in parts of North America. There are many different ...