The shockwave from the Chelyabinsk meteor circled the Earth -- twice!

You know an explosion is powerful when an explosion requires a team of researchers who normally look for illicit nuclear bomb tests shift to study it. And yes, the group's results show that the Russian meteor created a big boom indeed. » 6/28/13 12:20pm 6/28/13 12:20pm

The biggest avalanches in the solar system happen on Saturn's moon…

Iapetus, already one of the strangest moons in our solar system, just got a little weirder. Images from the Cassini space mission reveal that the mysterious moon is home to massive ice avalanches second in size only to landslides seen on Mars. Studying them, say researchers, could help us better understand geological… » 7/30/12 7:25am 7/30/12 7:25am