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 ...

In fact, it’ll be officially closed off by the end of this summer. SFGATE reports how Crater Lake National Park in Oregon — which is home to the deepest lake in the country — is closing down ...

James Turrell discusses his ongoing land art piece, Roden Crater, created within a pit formed by an extinct volcano in the Arizona desert. ART21: Where are we, right now? TURRELL: Well, right now ...