Earth Notes

Earth Notes
7:52 am
Wed May 8, 2013

Earth Notes: Glen Canyon Dam - What Flows In (And Not Out)

Upstream from Glen Canyon Dam
Credit National Park Service/Kyler Carpenter

Two hundred miles upstream from Glen Canyon Dam, the Colorado River roars through Cataract Canyon in a rust colored tumult, thick with silt and clay. Each year, the Colorado and its tributaries carry, on average, some 61 million cubic yards of sediment into Lake Powell, enough to fill more than 200,000 railroad boxcars.

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Earth Notes
10:16 am
Wed March 27, 2013

Earth Notes: New Mexico's Bisti Badlands

Bisti Badlands, New Mexico
Credit BLM New Mexico

In the northwest corner of New Mexico, not far from Chaco Canyon, there's a geologic wonderland that's weird even by the amped-up standards of the Colorado Plateau...

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Earth Notes
4:04 am
Wed March 20, 2013

Earth Notes: Rio Grande Silvery Minnow

Silvery Minnow
Credit Aimee Roberson/USFWS

The Rio Grande silvery minnow may sound like it has a name out of a children's book. But the problems it faces are unfortunately real.

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Earth Notes
2:24 pm
Wed March 6, 2013

Earth Notes: Maple Syrup's Local Cousin

Extracting syrup from a box elder
Credit Rachel Turiel

The sugar maple might get all the attention for it's sweet syrup. But it's southwestern cousin the box elder also has a sweet side...

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Earth Notes
9:45 am
Wed February 27, 2013

Earth Notes: Del Rio Spring's Green Oasis

Del Rio Springs
Credit Gary Beverly

In many parts of the country Del Rio Springs wouldn't get much attention. But because it's a reliable spring in an arid quarter, this little oasis has been attracting people for a long time.

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Earth Notes
5:03 am
Wed February 20, 2013

Earth Notes: Protecting The Plateau's Ancient Walls

Far View House, Mesa Verde National Park

In the latest installment of KNAU's environmental series, Earth Notes, we hear about some of the best practices for preserving ancient rock buildings on the Colorado Plateau.

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Earth Notes
6:28 pm
Wed February 13, 2013

Earth Notes: Campus Composting

This is a story about a young man, horse manure, vegetable peels and beer...

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Earth Notes
3:46 pm
Wed January 23, 2013

From Harvard Undergrad to Pioneering Archaeologist

Alfred Vincent Kidder in the early 1900's
Credit National Park Service

More than a century ago, a Harvard undergraduate named Alfred Vincent Kidder came out west. He came to volunteer at some archaeological sites that had just been excavated - places like Mesa Verde and other ancient ruins.

Nicknamed Ted, he had little more than a tape measure, a cheap compass and a Kodak camera. But the experience changed his life - and the course of southwestern archaeology.

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Earth Notes
5:27 am
Wed December 26, 2012

Earth Notes: The Mouse that . . . Whistles?

Grasshopper Mouse
Credit Utah Division of Wildlife Resources

At night, sharp-eared southwestern campers sometimes hear the sound of a fierce predator on the prowl.

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Earth Notes
5:16 am
Wed December 19, 2012

Earth Notes: How Dark Can the Night Sky Get?

Credit NASA

It’s well known that the sky gets darker as you get farther away from human sources of light.

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