environment

Fossil bones and ancient stone points clearly show that both giant mammoths and hunting peoples roamed the high Southwest some 13,000 years ago. But did these two types of mammals meet? Rock art researcher Ekkehart Malotki thinks that a petroglyph panel on the San Juan River holds a tantalizing clue.


U.S. Bureau of Reclamation

The U.S. Department of the Interior has launched a new federal water conservation program. The agency will work with private groups to encourage habitat health and water-use efficiency. 


USGS

Deserts like the American Southwest are expected to get drier as the climate warms. That’s bad news for soil microbes, according to a global study co-authored by researchers at Northern Arizona University.


Melissa Sevigny

The U.S. Forest Service signed a decision yesterday to begin restoration work on 15,000 acres of forest near the City of Williams.

Utah state officials are balking at the possible inclusion of southern Utah in a recovery zone for the Mexican gray wolf.

The Utah Wildlife Board says in a letter sent this week to the Department of the Interior that science shows the northern limit of the species' range is in central New Mexico and Arizona. The board called the plan bad policy, bad science and bad for the Mexican gray wolf.

The board's letter dovetails with a similar one sent last month by Utah Gov. Gary Herbert and governors in Colorado, New Mexico and Arizona.

Melissa Sevigny

Arizona ranks third in the nation for small-scale solar installations, according to new data from the U.S. Energy Information Administration.

Dean Anderson/Arizona Highways

A new study shows the land proposed for a national monument outside Grand Canyon National Park currently brings more than $50 million in revenue to northern Arizona. Arizona Public Radio’s Ryan Heinsius reports.


After smoking, the second-leading cause of lung cancer is colorless, odorless, tasteless—and can come from right underfoot. Radon is a naturally occurring gas formed from the radioactive decay of radium and uranium. Those elements are present in most soils and rocks, though usually in very small concentrations.


Courtesy

Officials at Grand Canyon National Park want to change how the public accesses the area’s backcountry. They say increased visitation is stressing park resources and the canyon’s environment. Arizona Public Radio’s Ryan Heinsius reports.


Dan Ruby, University of Nevada, Reno

Rollie-polies, book lice and bugs called springtails are among the 10 newly discovered insects that live only on the remote Easter Island in the Pacific Ocean. Northern Arizona University Ecologist Jut Wynne and his colleagues found eight of these creatures. They're eking out an existence in the limited entrances and skylights of caves.


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