Flowers and trees bloomed up to two weeks earlier than normal, suggesting the allergy season will likely be longer and more ...

Arizona's gorgeous landscape is home to the world's largest natural travertine bridge, which you can explore on various ...

A mountainous community in Arizona promises visitors a gorgeous state park, good restaurants, and beautiful hiking trails ...

A live-updating map of novel coronavirus cases by zip code, courtesy of ESRI/JHU. Click on an area or use the search tool to enter a zip code. Use the + and - buttons to zoom in and out on the map.

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