As Earth approaches warmer levels experienced earlier in its geologic history, it may be bad news for human survival.

Researchers have long wondered about the mysterious flat patches they found on the teeth of Ice Age Europeans. These dental ...

A nearly 6,000-year-old forest is once again seeing daylight after millennia hidden under ice in the Rocky Mountains. A team ...

A melting ice patch in the Rocky Mountains uncovered an ancient forest, and these trees have stories to tell about dynamic landscapes and climate change.