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A time lapse photograph of light pollution from Tucson reaching the Picacho Peak night sky.

Scientists: Darkness Harder to Find Due to Overpopulation

Use of artificial lights is increasing around the world; experts say tens of millions of people have never experiences truly dark skies.

Here we have the exterior of Biosphere 2 which is illuminated by a beautiful, golden sunlight.

AZ Illustrated Nature: Staying Cool in the Summer Heat

Learn about way to see nature indoors.

Ancient Signs of Intelligent Life

Visit some petroglyph sites in the Tucson Mountains with guide Allen Dart, the executive director of The Old Pueblo Archaeology Center.

The Arizona Board of Regents recently recognized four University of Arizona professors for their work and accomplishments, and this week we have been introducing you to each of these exemplary educators. Tonight we meet Distinguished Professor Eduardo Saez in the Department of Chemical and Environmental Engineering.

Distinguished Professor: Eduardo SaƩz, Chemical/Environmental Engineering

Research in wind-blown dust, oxidation lead his work

We speak with superintendent of Saguaro National Park, Darla Sidles (left) and Manzo Elementary counselor, Moses Thompson (right) about the Bio Blitz which aims to count all the living species in the park.

Readying for BioBlitz in Tucson

Saguaro National Park officials prepare to count all creatures great and small

A Tour of Kartchner Caverns with Gary Tenen

The cave's co-discoverer revisits Kartchner often, and finds it still amazes him 40 years later. A tireless evangelist for the cave he still refers to as "Xanadu", Gary Tenen invited Mark Duggan to accompany him on a recent trip underground.

CEDO Celebrates 30 Years Of Conservation

Center studies habitats and cultures of the Sonoran Desert and Sea of Cortez region.

Arizona's Condor Recovery Program A Success So Far

A recent release of four of the endangered birds highlights the effort to reintroduce the magnificent birds of prey.

Condor Release Program Continues This Weekend

Four of the endangered birds will be released from captivity into the wild Saturday.

urban micro farmer

Your daily food and the way you live

Tucson food activist says we can all make a difference in what we eat and how we live.

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