Enormous Canyon May Be Hidden Beneath Antarctic Ice

A rift almost as deep as the Grand Canyon but much longer may be hidden beneath the Antarctic Ice Sheet. Using satellite images and radio waves, researchers have uncovered tantalizing hints of a canyon up to 0.6 miles (1 kilometer) deep and more than 680 miles (1,100 km) long. "Discovering a gigantic new chasm that dwarfs the Grand Canyon is a tantalizing prospect," Martin Siegert, an earth scientist at Imperial College London, said in a statement.