Mapping out geology across the U.S. is surprisingly difficult, but the USGS has managed just that, and its map is more ...

"This Springer imprint is published by Springer Nature"--Title page verso. NH copy purchased with funds from the S. Dillon Ripley Endowment. Principles -- The Cordillera's foundations : ...

New research reaffirms that human footprints found in White Sands National Park, NM, date to the Last Glacial Maximum, placing humans in North America thousands of years earlier than once thought. In ...