Mysterious driftwood high in Grand Canyon caves hints at the legacy of Arizona’s huge impact crater.

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Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico Distinguished Professors Emeritus Karl Karlstrom and Laurie Crossey, along with ...

Early in the morning of October 6, 2008, astronomers at the University of Arizona detected an asteroid on a collision course with Earth. When other sightings cropped up across the world, the ...

A massive meteor struck near Manson, Iowa, 74 million years ago, creating the U.S.'s largest impact crater and reshaping the ...

They're stronger and more impactful than we ever knew.

In a small northwest Iowa town built atop a 74-million-year-old meteorite crater, even the drinking water carries remnants of ...