Rocks can hold clues to history dating back hundreds of millions of years.

Wednesday features a few showers once with our front stalling to our east and an upper-level low pressure system spinning ...

Geologists found evidence in the way enigmatic sandstones called Tava formed in the Rocky Mountains hundreds of millions of ...

A series of rocks hiding around Colorado's Rocky Mountains may hold clues to a frigid period in Earth's past when glaciers several miles thick covered the entire planet.

But to find that complexity, we must take the lessons of the boring billion to heart. Planets are not just a stage on which ...

A newfound rock-shelter in Tajikistan has artifacts created by ancient humans spanning 130,000 years. Along a stream in ...

Millions of years ago, a 10,000-foot-tall volcanic cone stood on the Cascade Ridge near Chinook Pass. Today, Fife’s Peaks are ...

Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than ...