Nature offers many dazzling displays, from jagged flashes of lightning to radiant sunsets. But perhaps one of the most ...

Arizona skywatchers were treated to a rare celestial show Tuesday as the northern lights shimmered across parts of the state.

If you've been on the road recently, you may have noticed some motorcycles with taillights glowing with a hint of blue besides the usual red, and it's hard not to wonder what the deal with those is.