Features

More Evidence for Ninth Planet on Solar System’s Fringes

A UA-led team finds that the four Kuiper Belt Objects with the longest known orbital periods revolve around the sun in patterns most readily explained by the presence of such a planet.

Findings Show How Aids Spread Across North America

A new technique that allowed researchers to analyze genetic material from serum samples of HIV patients taken before AIDS was known provides a glimpse into the beginnings of the epidemic.

Birdsong Could Offer Clues to Human Speech Disorders

UA researcher Julie Miller believes birds can help us understand the genetics behind language problems associated with Parkinson's disease.

Shipwrecks, Tree Rings Reveal Caribbean Hurricanes

A UA researcher and her colleagues found a lull in Caribbean hurricanes during the Golden Age of Piracy corresponds to a low in sunspot activity.

Massive Network of Robotic Ocean Probes

Initiatives aim to measure global warming’s impact on high seas and deep currents with increasing scope and quality using the Argo floats.

Light Echos Give Clues to Planetary Nursery Around Star

For the first time, UA astronomers used echoes of light to determine the distance from a star to the inner wall of its surrounding planet-forming disk of dust and gas.

Horn of Africa Drying Ever Faster as Climate Warms

The findings from a UA-led study suggest a worsening future for the conflict-troubled region, which includes Somalia, Djibouti and Ethiopia.

'The Martian' Food Growing System: It's Here

A team of UA researchers can already "farm" on the red planet with a fully functional prototype greenhouse that produces sweet potatoes and strawberries.

HiRISE Images Show Signs of Liquid Water on Mars

Former UA undergraduate Lujendra Ojha discovered possible water-related streaks on the red planet's slopes.

UA Creates Accessible Study-Abroad Geosciences Course

The geosciences capstone field course will be based in Italy and serve juniors, seniors and graduate students starting next summer.

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