geology

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 Flagstaff scientist has a new idea about how mountains form on Io, the volcanic moon of Jupiter. 


Susannah Porter

Microscopic fossils in the Grand Canyon show evidence of a vampire-like predator that punctured its prey to suck out the innards.


Arizona Geological Survey

Geologists believe a string of earthquakes this month in the Northwestern part of the state are not building up to a larger quake. Arizona Public Radio’s Justin Regan reports.


NASA

Astronauts could be at risk for lung diseases if they ever make extended visits to the Moon. That’s the implication of a study that used volcanic soil from northern Arizona as a substitute for lunar dust.


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