All animals–including humans–are home to trillions of microbes that are crucial to health. Many of these microbes spread socially, relying on close contact or cohabitation. But what happens when those social routes don’t exist?

Finely preserved brain features in a tiny marine arthropod fossil suggest that arachnids – spiders and their close kin – may have first evolved in the ocean rather than on land, challenging conventional wisdom.

The project enhances LBT’s visible-light capabilities, advancing U.S. leadership in next-gen astronomy.

The meteor impact that created one of Arizona's most recognizable landmarks and the wood and sediments found in a cave in the Grand Canyon are strikingly similar in age. A new study involving a U of A dendrochronologist suggests they could be related.

Discovered only a week ago, comet 3I/ATLAS is only the third known visitor from outside the solar system. U of A astronomer Carson Fuls explains what makes the comet special – and why we can only guess where it came from.

More than 300 Fulbright Scholars have represented the University of Arizona at institutions around the world since 1954.

The Weather Safety Messaging Project is designed to inform out-of-state travelers about three of the state’s most hazardous weather events: extreme heat, dust storms, and flash floods.

The first images from the Vera C. Rubin Observatory mark a proud milestone for the University of Arizona, whose Richard F. Caris Mirror Lab is the only facility in the world capable of crafting the telescope's unique mirror.

Built with mirrors manufactured by the University of Arizona, one of the world's largest optical telescopes clears key milestone toward U.S. federal construction support.

The U of A earned its best ranking in the space science category, rising four spots to No. 4 globally and No. 2 among U.S. public universities.