Last time we learned about Mars' great Valles Marineris, the largest canyon in the solar system. But what about here on Earth, is the Grand Canyon really the biggest? What I thought to be a simple ...

Rep. Raúl Grijalva, a 12-term Democrat from Arizona, has died after complications from cancer treatment, his office says.

Colleagues and friends of Rep. Raúl M. Grijalva praised his commitment to working families, the environment and his Arizona ...

Grand Canyon boaters putting into the Colorado River commonly do ... And by extension, rename the state of its origin? A blue ...

Madness" is not just a tournament, it's a phenomenon that was born on the courts of Illinois in the 1930s, and today it’s ...

After hours of uncertainty, officials from the Houston company said there are clues that the spacecraft is on its side, which ...

The Athena lander from Intuitive Machines could not charge its batteries after ending up on its side. It largely failed to ...

Scenic trips: Flagstaff to Grand Canyon is one of Arizona's most gorgeous ... you can still see features of the mountain's volcanic origin, such as Wild Bill Hill, Kendrick Peak and the ...

In the March 4, 2025, online issue of the journal Geology, Utah State University geoscientists Jordan Jensen and Alexis Ault describe a new forensic tool to help researchers understand the creation of ...

Seeing in the dark: Under the Grand Canyon's dark skies ... a scientist found 'Lucy' and rewrote our origin story You've seen the billboards. Now meet the three friends who have made Rafi a ...

From the glaciers in Patagonia to the sand dunes in Namibia, here are 57 gorgeous photos of the last unspoiled places on ...