Late last year, a newly discovered asteroid caused quite a stir when initial observations revealed a greater than 1% chance that it would strike the Earth in 2032. The medium-sized asteroid, dubbed ...

Add Yahoo as a preferred source to see more of our stories on Google. This artist’s concept shows a small meteoroid striking the surface of Earth’s moon. (Mark Garlick/Science Photo Library/Getty ...

Mysterious driftwood high in Grand Canyon caves hints at the legacy of Arizona’s huge impact crater.

View from the Grand Canyon's South Rim onto Nankoweap Delta. Remnants of a past natural dam created by a landslide are visible on the far side of the Colorado River, just to the left of the dry bed of ...