Valley Metro said the bus had no passengers and was returning to its East Valley maintenance facility before the driver noticed fire in the rear of the bus. Smoke could be seen for miles but didn’t affect planes going to and from Phoenix Sky Harbor Airport. No one was hurt in this response, but the cause of the fire is still under investigation.

When it comes to famous holes in the ground, northern Arizona has two: Grand Canyon and Barringer Meteorite Crater. New research now suggests that these famous depressions might, in fact, be linked—the impact that created the crater roughly 56,