Microbes - alive and thriving -- have been found sealed within a fracture of 2-billion-year-old rock beneath Earth's surface.

A doorway cut with great precision into the face of a rocky mountain in Peru may be one of the world's greatest mysteries.

Scientists with NASA's Perseverance rover are exploring what they consider a veritable Martian cornucopia full of intriguing rocky outcrops on the rim of Jezero Crater. Studying rocks, boulders, and ...

This hidden geological layer, located between 254 and 410 miles (410 and 660 kilometers) beneath the Earth’s surface, covers ...

In the middle of the Pacific Ocean, thousands of miles from any continent, Easter Island rises out of the sea. Its surface ...

The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

Exploration update at Palito, Coringa and São Domingos ...