Some employees at the National Nuclear Security Administration, which oversees the U.S.’ nuclear weapons, were reportedly ...

Shutterstock One of Arizona’s Greatest Ancient Wonders The Casa Grande Ruins represent one of North America’s most remarkable ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

Arizona is no stranger to weird and wild things. These nine landmarks were recently named the strangest in the state by World ...

Planning a trip to Arizona? I’m quite sure the Grand Canyon probably features on your itinerary as it is probably the most ...

REx mission has an historic opportunity to closely observe the asteroid Apophis and improve our ability to defend against ...

In the Arizona desert, researchers are learning so much more about the peoples who have inhabited this land since antiquity ...

Imagine an ear falling off a first century Roman statue and you’ll get an idea of what someone found at the Lake Mead National Recreational Area in Arizona. Photos of the fossil — yes, it’s assumed to ...

(AP video produced by Javier Arciga) This image provided by NASA shows a view from orbit looking obliquely across the surface of the moon, where an ancient asteroid strike carved out a pair of grand ...

U.S. and British scientists used photos and data from NASA’s Lunar Reconnaissance Orbiter to map the area and calculate ... canyons comparable in size to Arizona's Grand Canyon in barely 10 ...

Sixty labs around the world are analyzing bits of Bennu as part of initial studies, said the University of Arizona’s Dante Lauretta, the mission’s chief scientist who took part in both studies.

Asteroid samples fetched by NASA hold not only the pristine building blocks for life but also the salty remains of an ancient water ... said the University of Arizona's Dante Lauretta, the ...