environment

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. 

 

Tim Evanson

Long before Europeans arrived in the Western Hemisphere, turquoise was an exceptionally prized stone—used in jewelry and masks, for example. But the blue-green mineral doesn’t occur naturally in many of the same places where such artifacts have been found in the Southwest. 


USBR

An experimental release of water begins today at Glen Canyon Dam. The artificial flood will rebuild sandbars and improve wildlife habitat on the Colorado River.


U.S. Fish and Wildlife Service

More than 170 different kinds of bees are pollinating plants in Arizona’s high elevation forests. Flagstaff ecologist Lindsie McCabe wants to know what will happen to them as global temperatures warm. She’s conducting experiments with bees on the San Francisco Peaks, simulating the impact of climate change on native pollinators.


"In & Around the Grand Canyon"

“Few countries in the world present so marvelous a variety of scenic features as Arizona,” wrote author George Wharton James almost a century ago. “What a wonderland of wild cactus growth, of solitude, of mystery, (and) of silence it is!” 


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