WASHINGTON — Scientists can't know precisely when a volcano is about to erupt, but they can sometimes pick up telltale signs.

Staggeringly diverse rock art motifs in galleries across what is today Serranía De La Lindosa, Colombia, record a history of ...

The book chronicles both the park’s most well-known events, such as its establishment in 1872, the 1959 Hebgen Lake earthquake and the 1995 restoration of wolves, as well as other ...

Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet ...