A new study has revealed the formation of the Grand Canyon may be tied to the creation of another Arizona landmark.

Crinia is a unique 5-kilometer asteroid that shares Earth’s orbit in a rare one-to-one rhythm. Despite its nickname as Earth’s “second moon, ” it actually orbits the sun with a looping path that ...

Share Tweet The Arizona Diamondbacks’ selection of Arizona right-hander Raul Garayzar in the 18th round (543rd selection) of ...

Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico ...