Why do we have a special day to celebrate space rocks? On June 30, 1908, a massive explosion over Tunguska in Siberia ...

These famous rock formations are the result of volcanic eruptions 6 to 7 million years ago that blanketed the land in 1,000 feet of earthen debris.

Index granite is famous for its texture, but Mount Index contains more mysterious rock. Index granite was used to build the iconic Smith Tower in Seattle, and it is known by climbers all over the ...