New research found that more than 22% of native pollinators in North America are at an elevated risk of extinction.

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

For more than 140 years, Mixodectes pungens, a species of small mammal that inhabited western North America in the early Paleocene, was a mystery. What little was known about them had been mostly ...