Nature and Environment

UA researchers dating ancient volcanic eruption using tree rings

Jun 10, 2019 The tree rings can help them understand more about the explosion of a volcano thousands of years ago.

1st Mexican gray wolf litter born at Phoenix Zoo in 20 years

Jun 5, 2019 The wolves are endangered. Officials in April said there are at least 131 in Arizona and New Mexico.

Grand Canyon named International Dark Sky Park

Jun 5, 2019 Park workers have retrofitted more than 1,500 light fixtures with LED bulbs and shields focusing light on the ground.

Endangered condor may have hatched in Zion National Park

Jun 3, 2019 Behavior changes in known breeding pair of birds indicate the possibility of hatched chick.

Arizona Spotlight for May 30th, 2019

May 30, 2019 Also: Climbing Mt. Lemmon in the footsteps of Sara Plummer Lemmon; TIHAN celebrates 25 years of helping Tucson's HIV-positive community live better; and an artist who finds creative satisfaction in millions of tiny hand drawn lines.

Support and opposition for two mines in Southern Arizona

May 30, 2019 As the Rosemont Copper mine plans to start construction, we talk with those for and against the project.

Walking in the footsteps of Sara Plummer Lemmon

May 29, 2019 The story of a botanist and artist who had a mountain named after her.

Fire danger high in southeast Arizona this weekend

May 24, 2019 The National Weather Service has issued a fire weather watch.

Balancing conservation, grazing and recreation on the San Pedro River

May 24, 2019 The Bureau of Land Management has a finalized plan to guide management of the San Pedro Riparian National Conservation Area.

Researcher: Snakes holding steady against Tucson sprawl

May 21, 2019 A UA scientist is studying the impact of urban development on reptile wildlife.

Western states sign historic agreement to deal with drought

May 21, 2019 The drought contingency plan has been years in the making.

Project tracing earth changes to introduce plants into its landscapes

May 21, 2019 The Landscape Evolution Observatory experiment at Biosphere 2 observes changes to natural landscapes in a controlled environment.

Weather system brings 'unusual' temperatures to Tucson

May 20, 2019 The chilly weather also meant light snow, hail and freeze warnings in parts of state.

Tucson Riverbed Clearing Underway

May 17, 2019 The Santa Cruz and Rillito channels are being readied for monsoon rains.

Sustaining the San Pedro River

May 16, 2019 A panel in Bisbee discusses the present and future of Southern Arizona's last large, free-flowing river.

Discussion Looks to Future Colorado River Negotiations

May 16, 2019 With the drought contingency plan on the books, water leaders are starting to think about what's next.

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