Photos show climate change impacting national parks from Yellowstone's flooding to warming temperatures in Denali. Wildfires ...

As it turns out, this abandoned "secret city" was the site of a secret Cold War project known as Project Iceworm which called ...

Woolly mammoths, giant sloths and saber-toothed cats were a fact of life for early humans. New clues in Earth’s northernmost ...

Some people may be ready to write the epitaph for global progress against climate change. But as someone who teaches global environmental politics and has followed international climate talks for ...