Material from the crater can "tell the story of the late evolution of the lunar magma ocean," scientists say. A giant impact crater on the moon may contain primordial pieces of the lunar mantle ...

Europe's most active volcano, Mount Etna on Sicily, is erupting again, sending a huge plume of ash and smoke into the air and ...

Is that a crater on the Mission Road side of "A" Mountain ... Correct answer: Oh, c'mon. You can figure it out. Got an oddity? Is there something you've noticed while driving through Tucson ...

Several videos circulating online show people running as smoke from the side of Mount Etna filled the air on June 2.

The menacing asteroid that wiped out non-avian dinosaurs left a colossal marine crater in what's now the Yucatan Peninsula. But after analyzing deeply drilled rock core from the impact site ...

When Kevin Heatley took over as superintendent of Crater Lake National Park in January, he was excited to oversee one of ...