An analysis of fossils from the country hints that animals from the north stayed in a "holding pen" between seven million and ...

Until the Panamanian isthmus formed about 2.8 million years ago, North and South America were isolated continents with unique ...

The year 2026 is going to be a momentous one for the United States as it celebrates its 250th anniversary. Across the country, national parks, historic sites, and cities will gear up to show up—and ...

Experts say the world is experiencing two opposing fire trends because of human impact. Wildfires in Europe, Canada and the U ...