An exclusive, challenging hike is now available to guests visiting Meteor Crater. Here's how to visit the bottom like the astronauts of yesteryear.

Meteor Crater in Arizona will begin offering guided hikes to the crater floor starting in May. The trail follows the same path Apollo astronauts used to train for moon landings. These advanced hikes ...

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 ...

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 ...