The main trail at Elephant Rocks is the Braille Trail, a one-mile paved pathway that loops around the park’s most impressive features. It was one of the first trails in Missouri State Parks designed ...

A rock containing many smaller round stones could indicate that there was once a large amount of liquid water on the Red ...

A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought.