Karlstrom and his colleagues could infer how deeply groundwater was infiltrating through cracks in the volcanic rocks. That allowed them to map the volume of the aquifer. Previous estimates of ...

From Grand Canyon to Petrified Forest to Saguaro National Park, here are the best things to do in Arizona's most beautiful places.

Karlstrom — along with researchers from Oregon State University, Duke and the U.S. Forest Service — are trying to map out how much water is stored beneath the volcanic rocks of the Cascades.

In 1863, a Russian paleontologist and mining engineer made his way through the Eocene strata of the Caucasus to the shores of the Caspian Sea. His name was Hermann Vil’gel’movich Abikh, and he had ...

Karlstrom and his colleagues could infer how deeply groundwater was infiltrating through cracks in the volcanic rocks. That allowed them to map the volume of the aquifer. Previous estimates of ...

Here’s everything you need to know to plan a trip to Saguaro National Park, including the best hiking trails, things to do, ...

Flu numbers across Oklahoma are considered "high risk," so many districts are closing their doors on Wednesday or for the next few days to stop the spread.

Winds could threaten small signs of progress firefighters made over the weekend with the devastating Pacific Palisades Fire.

Research on hidden structures deep within Earth’s mantle challenges theories about our planet’s middle layer and could ...

Sedona, Arizona: a place with cloud iridescent rainbows in the air and trees twisting from underground crystals. The Legend, ...