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Aquatic rodents might not instantly pop to mind when you think of Southern Arizona wildlife - but they're thriving this spring along the San Pedro River near Sierra Vista.

We're talking beavers - those dam-building, tail-slapping mega-rodents more often associated with mountain streams than arid-region rivers.

"Beavers are doing really well right now on the San Pedro," said Marcia Radke, a wildlife biologist with the U.S. Bureau of Land Management. "We...

With temperatures in the triple digits, and summer's official start looming around the corner, it's time to start thinking about protecting your skin.

The Skin Cancer Institute at the University of Arizona is doing just that, with their Protect Your Skin Program, which provides sunscreen and sun safety information at some of Tucson's outdoor attractions.

For the past six years, the Arizona-Sonora Desert Museum has provided sunscreen and sun-blocking umbrellas to its...

Forget gas mileage: The most striking aspect of the new Ford Focus Electric is what it doesn't have. "Battery-powered cars are intrinsically quiet, the motor sound falling between a whir and a whisper," marvels a New York Times review of the car. "But the Focus is deep-space silent, the quietest of the many electric cars I've driven."

And that, it turns out, is a problem.

Due to the Pedestrian Safety Act of 2010, by this summer the National Highway...

Thanks to the generosity of three professional meteorite hunters, the UA Lunar and Planetary Laboratory will own three samples of a rare kind of meteorite leftover from the earliest beginnings of the solar system.

To the untrained eye, the black, smooth-edged lump that is sitting under a glass cover looks similar to a piece of charcoal. But to scientists Dante Lauretta...