Antelope Canyon is stunning, but there's another canyon nearby that offers unforgettable sights on small tours that give you ...

“There’s a hill with a V-shaped collapse structure (the nose), two craters (the eyes), and a circular fracture pattern (the head),” The University of Arizona noted in a statement.

Some feel almost otherworldly, with strange rock formations and the occasional glow ... the limestone passages beneath southern Arizona hold some of the region's best-preserved cave formations.

My colleague noticed something strange in the latest batch ... of Earth and Space Exploration at Arizona State University, wrote back to me: Balancing rocks (sometimes called Precariously Balanced ...

NASA's Curiosity Mars Rover has spotted strange rock formations on the red planet that appear to have formed into small, twisted towers. A photo of the rock formations was shared on Twitter last ...

Nasa astronomers have discovered a strange structure on Mars resembling a bear’s face, marking yet another instance in which rock formations on the Red Planet ... according to the University of ...