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

Donald Trump changed the name of the "Gulf of Mexico." Google Maps updated their systems. Mexico's President continues to threaten a lawsuit.

The name change to Gulf of America is the first since the 1540s where various maps referred to it as the Mexican Gulf, Golpho de la Nueva España, and, finally Gulf of Mexico.

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 ...

A flood watch remained in effect for most of Middle Tennessee through noon Sunday as a powerful storm system doused the ...

Millions of Americans are in the path of a storm that is hitting parts of Tennessee, Kentucky and Virginia the hardest, with ...

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

George W.P. Hunt, who would become Arizona's first governor, was instrumental in guiding it toward statehood in the early 1900s.

Residents in several southern states were found to spend the highest percentage of their income on groceries, according to a ...

The accident, where more than 80 tons of radioactive waste were released by an explosion, spread large amounts of nuclear ...

ON THE MENU Dem voters want more moderation Senate GOP’s big map, big money Trump hedges on Vance Transgender readers respond ...