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December precipitation ranged from average to much-below average across most of Arizona, with record-dry conditions along the western edge of Arizona. Above-average temperatures and below-normal precipitation are reflected in the expanding areas of drought designation in the Jan. 17 U.S. Drought Monito, with Arizona documenting increases in extent and intensity of drought since the December outlook.

Those who worry about the Earth's animals and plants are more likely than others to experience stress — and even depression — related to climate change, UA researchers found.

Donald Falk, a fire specialist with the UA's School of Natural Resources and the Environment, discusses the physics behind how fires start and spread.

The UA Tech Park is seeking projects for the second phase of the Solar Zone, a solar testing and demonstration site located on the northwest side of the tech park on South Rita Road.