As the famed North American road gears up to celebrate its centenary, head to Arizona; home to the longest remaining stretch ...

Martian lake beds and deltas reveal the Red Planet’s watery past. But many puzzles remain, scientist Bruce Jakosky says.

Whether you are looking for something to do in Arizona for a quick day trip, weekend jaunt, or week long getaway, the Grand ...

A NASA map shows the regions across the Northern Hemisphere where this weekend's partial solar eclipse will be visible, how ...