Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

One photographer put the age of starlight into perspective with stunning projections on some of Earth's oldest rock ...

Tucked away in a lesser-visited area of Kansas is a family-friendly rock park that offers visitors a year-round glimpse into ...

A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.