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.

University of Arizona Health Sciences researchers will take a precision medicine approach to treating obstructive sleep apnea in people with Down syndrome.

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.

Researchers discovered that lower levels of essential vitamins and minerals, were more prevalent in individuals experiencing severe chronic pain.

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.

The gift will fund the Mars/Airth Scholarship in Veterinary Medicine endowment and ongoing human-animal interaction research.

The information is valuable to agriculture, public safety and urban planners and even contributes to the weather app on your phone.