A grand, sandstone-walled pit in Mesa Verde National Park has for decades been seen as an achievement of prehistoric hydrology, part of a system of cisterns and canals used by Ancestral Puebloans ...

It may be hard to visualize if you’ve been through drought-stricken southern California lately, but much of what’s now Los Angeles was once a teeming wetland. And a new landmark survey going ...

Epic winter swells just off of Oahu, Hawaii, have churned up monster waves more than 7 meters high, sent seawater surging around the foundations of beachfront homes, and gnawed away at sandy ...

The remains of a one-year-old boy who died 12,600 years ago in what’s now Montana are giving up exceptional information about the place his people held in American history, and the origins ...

New analysis of two spear-throwers excavated nearly a century ago in the Ozark Mountains reveals what one archaeologist calls an “uncanny” similarity to those used in the ancient ...

Ten years after a surfer first tipped him off to some bones eroding out of a sandy bank, a paleontologist says he has uncovered a massive cache of marine mammal fossils in the Bay Area, some of ...

Eight thousand years ago, as today, one thing you needed to get by in southern California was petroleum. But even then, it seems, you didn’t need the top-grade stuff shipped from far away ...