If you’re someone who enjoys solving puzzles or loves a good challenge than I have an absolute treat for you. Your mission should you choose to accept it – is to find a lizard cleverly hidden in these broken branches.

Amid protests against racism, scientists move to strip offensive names from journals, prizes, and more

The cause of the drop in water levels at Quitobaquito Springs is complicated, experts say.

The center, since 1989, has helped address the state's most pressing environmental contamination sites.

Wastewater-based epidemiology can test large groups of people and help better allocate scarce resources

On June 17 in Tucson, Peter Norton watched smoke billow from the Santa Catalina Mountains. His shift at Mount Lemmon’s fire department had ended the day before, but he and another firefighter, Aaron Lindflott, had made a pact. When it was time to head back up the mountain to fight the Bighorn Fire, they’d be ready.

Conservationists want the cactus ferruginous pygmy owl back on the endangered species list, but opponents say it’s unnecessary.

All eyes have been on the Bighorn Fire since it sparked on June 5.

But now, city and county leaders are preparing for what comes next — monsoon and flooding.

Looking for a new activity to do while staying home to social distance? 

A number of scientists host weekly games and challenges on Twitter. Players get to have fun for free while learning trivia about the natural world.