The World Around Us

Impact crater, Arizona, USA, caused by an extra-terrestrial object.  It has a diameter of about 4,000 feet (1.25 km) and is 550 feet (168 m) deep.

Impact crater, Arizona, USA, caused by an extra-terrestrial object. It has a diameter of about 4,000 feet (1.25 km) and is 550 feet (168 m) deep.

Credit: NASA