Precariously balanced rocks, or PBRs, can be found throughout the world, identified by slender rocks balanced on a pedestal boulder. There are a few ways they can form.

A precariously balanced rock at Westfield, Vermont. USGS seismologist Thomas Pratt stands on top. The 2-meter measuring stick is provided for scale. Five boulders, delivered by glacier and ...

The balancing rock isn’t the only strange rock formation to be found on Mars. Last month, NASA’s Curiosity Rover snapped an image of what looked like a doorway leading into a rock face.

The mysterious appearance of two dozen precariously balanced rock sculptures in a Toronto river was revealed Tuesday to be the work of an artist simply looking to clear his head on a Sunday afternoon.

Rocks with seemingly acrobatic balance are seen all over the world. Meteorological and geological forces wash away the material around them, leaving the giant rocks balanced like a top. There's even a ...

The mysterious appearance of two dozen precariously balanced rock sculptures in a Toronto river was revealed Tuesday to be the work of an artist simply looking to clear his head on a Sunday afternoon.

Balanced Rock Park, USA Over 15m tall and weighing 40 tons, this wind-carved rock balances precariously on a pedestal only 1m by 43cm. No, we wouldn't want to stand there for too long.

Most rock formations are interesting to see while driving by, but one type in particular has had scientists intrigued for years. "Precariously balanced rocks" is what the research team calls these ...