This video shows a rugged rock formation in Mongolia, where large orange-brown stone blocks rise from dry land and appear ...

NASA's Perseverance rover has captured a surprising image on the Martian surface: a pile of rocks that eerily resembles a terrestrial cairn. This discovery was made on May 13 (mission sol 1859).

Hikers in Yosemite National Park are answering the growing calls to knock down man-made rock formations along area trails. The rock piles can be several feet high and most people see them and walk on ...