Scientists have long debated what is under the surface of Mars' south pole. A new study points to clays being more likely than a subsurface lake.

There are huge differences in species numbers among the major branches of the tree of life. New research finds that sexual reproduction and multicellularity drive that diversity.

UArizona's CyVerse will take part in a $20 million institute that aims to transform agriculture through artificial intelligence.

A new agreement between the Pascua Yaqui Tribe and UArizona affirms the university's commitment to helping the tribe's members reach their higher education-related goals.