More Science Stories

Mt. Lemmon Fees to Change Starting July 4

Recreation area will charge visitors in 11 individual sites instead of as a whole.

Deadly Wildfire Continues Out of Control

Blaze that killed 19 firefighters has 'high' potential for growing beyond its 8,400 acres, officials say.

Demographics Changing for Migrant Deaths in the Desert

Report shows more people from Central America crossing into the U.S.

Wildfire on Mount Lemmon Burns 200 Acres

Blaze possibly caused by lightning Sunday evening continues to grow on site of Aspen Fire of decade ago.

Prescott in Mourning: 19 Firefighters Killed

1,000 jam auditorium for memorial; tears, eulogies, prayers, moment of silence mark Sunday's tragedy.

'Excessive Heat' Warning Remains in Effect in AZ

Temperatures to 116 Sunday, with limited outdoor activity advised; monsoon coming, but not soon enough.

Signs Point To Early Monsoon Rains

Forecaster predicts moisture will come not long after season's official start Saturday, similar to 2012.

60-Year-Old Desert Museum Keeps It Fresh

Mountain lion cub on exhibit after rescue from California

Future of Colorado River Discussed

Another dry year, more stress on dwindling water supply

Patagonia Wildfire 75% Contained

Mop-up beginning; flames no longer spreading

Dwindling Waterways Draw Scientists

Sonoran Institute researchers working on issues, raising awareness

Sabino Canyon: Desert Delight

Popular hiking, recreation area alive with color for spring

Horseshoe 2 Fire, Two Years Later

Chiricahuas blaze scorched 200,000 acres; recovery slow

Ten Years After the Aspen Fire

Mount Lemmon recovering slowly from historic wildfire

Motivated Exercisers on the Move

Personal drive comes from many sources

Desert Splendors for Month of May

Naturalists point to blooms, butterflies, other beauties

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