National Park Service

Dan and Cindy Duriscoe, FDSC, Lowell Obs., USNO

The National Park Service says Flagstaff is seeing the benefit of the city's decades-long commitment to dark-sky friendly practices in the form of satellite images showing far less light pollution than a comparable-sized city.

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.

NPS

Grand Canyon National Park has surpassed its visitation record for the second year in a row.

Pete McBride

Fewer than three dozen people have ever hiked the entire 800-mile length of the Grand Canyon. Two journalists on assignment for National Geographic completed the journey last month and have now been nominated as the magazine’s 2017 Adventurers of the Year. Arizona Public Radio’s Ryan Heinsius reports. 


Earth Notes: Vibes at Rainbow Bridge

Nov 16, 2016
NPS/B. Lee

Rainbow Bridge in southeast Utah is one of the largest natural bridges in the world. And though the immense sandstone span looks solid and unmoving, scientists are finding out otherwise. 

 

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