Earth Notes

Earth Notes
3:02 pm
Wed April 22, 2015

Earth Notes: Aerial Acrobats

Photo: Jim Peaco/National Park Service.

  As cliff swallows return to the Colorado Plateau this spring, they set about building mud nests on cliffs – or, just as often, on manmade structures like bridge abutments or under wide eaves. That takes a lot of work—more than a thousand beakfuls of mud for a new nest.

  Cliff swallows live communally, and they’ll sometimes fast-track the nest-building process by stealing mud from neighbors or laying an egg or two in a nearby nest.

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Earth Notes
3:11 pm
Wed April 15, 2015

Earth Notes: After a Fire, Is a Spring an Oasis?

Springs are magical places where groundwater comes to the surface — lush green patches that are among the most diverse, productive, and threatened ecosystems on Earth.

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Earth Notes
3:29 pm
Wed March 25, 2015

Earth Notes : Migratory Birds May Carry Global Hitchhikers

Credit Credit: Wikipedia Commons.

Migratory birds are among the forces that stitch the globe together. Biologists have long known that animals can carry seeds and spores on their bodies, or may eat them and spread them in their waste.

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Earth Notes
8:00 am
Wed March 11, 2015

Earth Notes: Tiny Particles, Big Impact

Credit NASA/JPL-Snow Optics Laboratory

  For those living in the American Southwest, dust is as much a part of the environment as dryness and sunshine. Tiny particles seem to get into everything, including houses, cars, and noses.

While dust can be annoying, scientists believe it plays a vital role in the region’s ecology. It appears to provide essential minerals and chemical compounds to high-mountain ecosystems, just as seafaring salmon bring ocean nutrients high up into freshwater streams.

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Earth Notes
8:00 am
Wed March 4, 2015

Earth Notes: Walnut Canyon Celebrates a Century

  This year, Walnut Canyon is celebrating a hundred years of protection as a national monument—protection that came none too soon because its prehistoric sites were being seriously damaged.

It was people known to archaeologists as the northern Sinagua who built some three hundred rooms in the limestone alcoves of this hidden canyon near the San Francisco Peaks. They lived, farmed, and hunted in the canyon and on the rim from the 1100s into the mid-1200s.

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Earth Notes
8:00 am
Wed February 25, 2015

Earth Notes: Grand Canyon's Pioneering Cactus Collector

Credit National Park Service

  It was a long way from the civilized college town of Ann Arbor, Michigan, to Mexican Hat, Utah, back in the summer of 1937. But Dr. Elzada Clover made the trip.

A botanist at the University of Michigan, she had an ambitious dream to explore the little-known plant life of the Colorado River region. Cacti were her specialty. Where better to find them than the Southwest deserts?

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Earth Notes
8:00 am
Wed February 18, 2015

Earth Notes: Seeding the Clouds

Credit National Center for Atmospheric Research

  For generations western farmers have worried about getting enough water from the sky to nourish their crops. Some have tried to do something about it.

A century ago farmers in places like the Great Plains and California hired specialists who claimed they could water the land by shooting explosives into the sky or by releasing secret mixtures of chemicals. Sometimes it did rain then. Sometimes it didn’t—in which case the would-be rainmakers typically left town fast.

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Earth Notes
1:44 pm
Wed February 11, 2015

Earth Notes: The Love Song of the Sandhill Crane

Credit U.S. Fish and Wildlife Service

  People in New Mexico pay close attention to the sky this time of year, watching and listening for flocks of sandhill cranes flying in graceful V-formation.

Each winter, ten to twenty thousand sandhills arrive, spending the days resting and feeding along the Rio Grande around Albuquerque and south. Others winter in southeastern Arizona.

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Earth Notes
8:00 am
Wed February 4, 2015

Earth Notes: All the Poop on Rarely Seen Animals

Credit Northern Arizona University

For wildlife biologists, animal droppings are like nuggets of gold, packed with what they value most: information. Rather than spending weeks lurking in bushes hoping to dart an elusive animal with a tranquilizer gun, setting traps, or trying to catch it in a net, researchers have become poop detectives.

Arizona wolf biologists have even used specially trained tracking dogs to sniff out the information left behind by these secretive animals.

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Earth Notes
9:17 am
Wed January 28, 2015

Earth Notes: Expanding Goblin Valley

Credit Utah State Parks

  Many visitors discover Goblin Valley by chance on their way between marquee national parks like Capitol Reef and Canyonlands. But this Utah state park received unwanted publicity in 2013 when two men were caught on video toppling rocks off the weirdly rounded hoodoos that give the park its name.

That act of vandalism spurred a big idea: why not expand the park? Goblin Valley currently consists of about 3,500 acres of outlandish geology. But that may soon grow to about 10,000 acres under a State Parks plan.

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