Move over Grand Canyon, because this hole in the ground was ranked the best roadside attraction in the nation. Here's why it ...

Arizona's Meteor Crater remains 'the perfect natural laboratory' for studying what happens when meteors strike Earth, ...

Early in the morning of October 6, 2008, astronomers at the University of Arizona detected an asteroid on a collision course with Earth. When other sightings cropped up across the world, the ...

Arizona’s Meteor Crater remains the best-preserved meteorite impact site on Earth. Despite being studied for over a century, ...

This piece is part of a special project on deep time examining what the Western U.S. was like thousands, millions and even billions of years ago, and how that history is still visible and ...

With Americans already having experienced four meteor sightings this month, it makes you wonder how common such space ...

Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico Distinguished Professors Emeritus Karl Karlstrom and Laurie Crossey, along with ...