Should land be used for solar panels or agriculture? The burgeoning Solar Sheep movement argues: Why not both?

One more tick and Pima County could face federal compliance issues which could be costly to county business but more importantly, for people’s health.

Dragonflies, toads, roadrunners, snakes and kingfishers all found a home at the Santa Cruz River downtown while Tucson Water was releasing large amounts of water into that stretch.

New Evidence reignites a longstanding debate about how the sea reconnected with the ocean.

Climate change deepens existing inequalities. 

A new collection of oral histories from people who work and live near two Arizona Superfund sites was posted online in January. The community-driven Voices Unheard project captures video accounts, photos, and descriptions from communities near the Tucson International Airport Area and the Iron King Mine-Humboldt Smelter Superfund sites.

A mass emergence of crane flies has many Tucsonans wondering what the creatures are, why there are so many of them and why they seemed to show up all at once. A University of Arizona insect expert has answers.

Across much of the United States, a warming climate has advanced the arrival of spring. This year is no exception. In parts of the Southeast, spring has arrived weeks earlier than normal and may turn out to be the warmest spring on record.

Katie Bell began her summer internship as a stranger in a strange land. But by the time she was finished, Bell knew her way around well enough to propose $20,000 of practical cost-saving methods. The company rewarded her with a full-time job offer.

The Supreme Court is taking up the Trump administration’s legal quest to keep certain Endangered Species Act records from the public eye.