Imagine an ancient world where shadows stretched beneath colossal trees, and the air shimmered with heat and humidity. In ...

The Megatherium roamed South America for 5.3 million years before it went extinct — though some Indigenous people claim to ...

At one time there were billions of American chestnuts in the Appalachian Mountains. Today, because of chestnut blight, ...

Primulina tabacum is a "calciphilous perennial herb found only at the entrances of a small number of karst cave drainages in ...