USGS

Steve Hillebrand, U.S. Fish and Wildlife Service

Arizona and Sonora, Mexico are one ecosystem—a diverse and rugged desert—but they’re split by hundreds of miles of fences and vehicle barriers. Scientists want to know how the current U.S.-Mexico border wall affects wildlife, and what will happen if that barrier is made more impenetrable. As KNAU’s Melissa Sevigny reports, doing research in this region is fraught with complications.

Donald Bills, USGS

A new study from the U.S. Geological Survey shows uranium in Pigeon Spring, north of the Grand Canyon, is likely not related to a nearby mine. The research is part of a larger effort to understand the impacts of uranium mining in the region.


Earth Notes: Angel Lichen Moths

Jan 11, 2017
Freshwaters Illustrated

Angel lichen moths take their beautiful name from Bright Angel Creek in Grand Canyon where early specimens were found, and from lichens that the larvae eat. 


Melissa Sevigny

The Grand Canyon is running short on sand. Sediment that once washed down the Colorado River to form beaches is now trapped behind Glen Canyon Dam. For two decades river managers have released artificial floods to rebuild the beaches … but it’s not clear if the river has enough sand for these experiments to work in the long run. That’s what scientists want to find out.

NASA/JPL-Caltech

A rare asteroid made of metal may have water on it. From the Arizona Science Desk, Melissa Sevigny reports the discovery was made by a planetary scientist in Flagstaff.


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