Scientists, including one from the University of Arizona, pinpointed birds' cerebellums as key to the evolution of flight by comparing images of today's birds' brains with dinosaur fossils.

Learn how unexpected discoveries involving black holes, tree-ring dating, planets and plastics have helped shape scientific research. The weekly series runs Feb. 7-28.

New images taken with the James Webb Space Telescope reveal intricate, never-before-seen structures and features hidden in visible light. The insights will help astronomers better understand the history of the Milky Way.

The specimen of the mineral stibnite was extracted in 2003 from the Wuling Mine in southeastern China and is exceptionally rare for its size, intricacy and quality.

In the same lab where university scientists invented ways to study climate history in tree rings, associate professor Bryan Black is using a similar technique – but with tiny fish bones.

Researchers from University of Arizona Health Sciences are one step closer to solving one of the biggest barriers to regenerative medicine: immunological rejection by the recipient.

The center will advance research and conservation efforts, educate future conservation scientists and leaders and develop a broader understanding of the Earth's biosphere.

NASA scientists last week removed the two stuck fasteners on the sample container that had prevented researchers from accessing much of OSIRIS-REx's asteroid Bennu sample.

With a new installation on Tumamoc Hill, a University of Arizona experimental philosopher wants to encourage people to imagine 1,000 years into the future – and plan accordingly.

Under the leadership of the University of Arizona's Dani Mendoza DellaGiustina, the former OSIRIS-REx spacecraft sets off on a journey to study asteroid Apophis and take advantage of the asteroid's 2029 flyby of Earth.