Stories - AZPM

Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing the chlorine that catalytically destroys ozone. The destructive cycle of a chlorine atom is shown in the graphic.

As Stockpiles Dwindle, Freon Prices Rise

Supply and demand is the biggest factor, but the history of refrigerants shows other costs, and their future is unclear.

The dome of a telescope at the UA Sky Center campus on Mount Lemmon.

Mount Lemmon SkyCenter Open House Saturday

Telescopes, exhibits and family activities show off science of the mountain.

The Tucson Convention Center exhibit halls fill with students' exhibits at the annual Southern Arizona Research, Science and Engineering Foundation fair.

Oro Valley Student Wins Big at International Science Fair

Medical research earns a trip to Nobel Prize ceremonies.

An alluvial fan is a fan-shaped deposit of sediments dropped by streams where the topography flattens and the water can spread over a broad area, typically at the exit of a canyon.

'Mars is Beautiful,' UA Scientists Enthuse Over Book of HiRISE Images

Also on Arizona Spotlight: Finding a future for historic Tucson places to become community art spaces; tune in with the UA amateur radio club; and new music from the Weiss / Soflin duo.

Image from a section of the Lower Colorado River Planning Area.

Study to Measure Impact of Contaminant Perchlorate on Yuma Residents

The common chemical could be causing hypothyroidism in the southwestern Arizona town.

Wulfenite, Red Cloud Mine, La Paz County, Arizona.

Wulfenite Joins Other State Symbols as Official Mineral

The colorful mineral is found in few places outside Arizona.

Retired Marine General Charles Bolden at the Goddard Space Flight Center in 2010, when he was administrator of NASA.

Former NASA Administrator Sees Key Role for UA in Space

OSIRIS-REx mission to asteroid is unprecedented.

As much as 22 percent of Shackleton Crater’s surface could contain ice, according to data from NASA's Lunar Reconnaissance Orbiter. The crater is located at the lunar south pole.

Shadow-Piercing Camera from ASU to Study Moon

The ShadowCam will look at 'dark side of moon' to help plan future missions.

The deep blue of Cherenkov radiation reveals the location of the fuel assemblies within the open reactor core (foreground). The tube beneath the platform, a tube-shaped fuel handling machine extracts one of these assemblies.

Inside Arizona's Only Nuclear Power Plant

The plant shuts down a reactor periodically for maintenance and engineering tasks.

'Woven Through Time' Reveals Cultural Fabric of the Southwest

Also on Arizona Spotlight: A state budget update; Dr. David Alberts retires from the UA Cancer Center; and "A Book I Love" returns.

A photo of Tucson resident Annie Laos from her memorial.

Annie Laos, A Tucson Original, Remembered by Friends and Family

Also on Arizona Spotlight: A look at alternatives to a physical border wall; how genome research helps science to understand epilepsy; "I Dream in Widescreen" brings new film makers' work to light.

Several hundred people march from Armory Park to El Presidio Park April 22, 2017, for the Rally for Science - Tucson.

Thousands Rally in Tucson to Support Science

Earth Day event aimed at promoting, defending fact-based research.

Geography and Tree Ring Lab researcher Kevin J. Anchukaitis studies climate, here he looks at a core sample under a microscope.

Episode 134: Earth Week - From Climate Science to Corporate Science

Politics, wildfire danger, corporate environmentalism and a solar wall.

10/17/12. Rebecca Brukman.
Image of landscape, featuring cloud cover, after monsoon.

National Weather Service Wants Help Spotting Storms

Program helps meteorologists get view of incoming storms to make monsoon safer.

Old Pima County courthouse in downtown Tucson.

Downtown Earth Day Rally Aims to Spark Interest in Science

Saturday event at Tucson's El Presidio Park is part of worldwide focus on science

Geoff Notkin crunches some meteorite data while at his spacious desert field desk.

Tucson Science Rally Gains Momentum as Earth Day Approaches

Also on Arizona Spotlight: Attorney General Sessions gives speech in Nogales; artist Lex Gjurasic stamps out reality; and Arizona's round-tailed ground squirrels get the attention they deserve.

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