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Venus Makes Once-In-Lifetime Celestial Cameo

Dozens gather in Tucson to watch planet cross between Earth and sun

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.

Crown King Residents Back Home; Fire Slows

Other AZ blazes at or near full containment; danger remains high

Cool Weather Slows AZ Wildfires

Crown King residents return home; fire stays at 16,240 acres

Tucson Retains 'Gold' Status in Bicycling

Advocacy group finds Old Pueblo's 600 miles of bike lanes make it friendly

UPDATE: Crown King Fire Evacuation Called Off

Residents, business owners can return Friday as fire's danger subsides

Crown King Fire Slows, Cooler Weather Seen

At 16,240 acres, it's biggest AZ fire so far this season
An aerial tanker over ther Gladiator Fire in northern Arizona begins dropping its fire retardant.

Crown King Fire Lines Hold Another Day

Blaze's spread slowed despite drastic weather conditions
The Gladiator Fire near Crown King, AZ, burns along a ridge line; stain from fire retardant drop is at left.

Firefighters Make Progress at Crown King

Blaze nears 15,000 acres, as crews work to contain westward movement
The Bull Flat Fire on the Fort Apache Agency in eastern Arizona left this scene in its wake. The fire is almost totally contained.

Crown King Fire Tops 14,000 Acres

Fire restrictions in effect; the outlook in Coronado National Forest

AZ Week: Big Wildfire Year Predicted

Ongoing drought means 'we’re flammable now,' official says
The Bull Flat Fire on Fort Apache Indian Agency land in eastern Arizona.

UPDATED: 4 AZ Wildfires Surpass 22,000 Acres

More than 1,200 firefighters on the lines; state restrictions in effect
The Biosphere 2 Model City research facility in Oracle, Arizona: Saturday, April 21, 2012. Members of the Tucson Electric Vehicle Association, TEVA2, visit with Biosphere 2 staff and officials from GoE3, an Arizona-based company that has promised to deploy 500 of their modular quick chargers across US highways over the next 18 to 30 months. Two Nissan Leafs and a Tesla Roadster is also shown.

Electric Cars

A closer look at Level 3 electric vehicle (EV) chargers, and the current controversy over which will become the industry standard.

Tree Rings Tell Ancient Tales

Dendrochronologists interpret environmental data from tree rings in a hidden UA lab
As the state's financial crisis forces state parks to close, small-town Florence, Arizona, is trying to keep its local state park open.

Ballot Measure Sought on AZ State Parks Funding

Initiative seeks to protect funding from state budget transfers
April sky over Tucson

Mixed Grades for Pima County Air Quality

Small particulates minimal, but ground-level ozone remains problem

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