The center of Arizona is in a small town, which might surprise you. Here's what to know about the center of Arizona and how to find it.

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

Here is everything to know about the history of Pluto being discovered in an Arizona observatory. Need a break? Play the USA TODAY Daily Crossword Puzzle. For more information on the biggest ...