Early in the morning of October 6, 2008, astronomers at the University of Arizona detected an asteroid on a collision course with Earth. When other sightings cropped up across the world, the ...
Those who've poked along the old, cross-country Route 66 through the American Southwest in Arizona might have accidentally driven by, or perhaps spotted, what looks like a giant, bowl-shaped hole in ...
The ancient meteor impact that formed Arizona's Barringer Crater sent shock waves through the Grand Canyon — likely triggering a landslide that dammed the Colorado River, a new study suggests.