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.
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.
Grasslands and grass crops, covering much of the world's land area and providing half of the calories humans eat, may be unable to respond quickly enough to a changing climate that is outpacing the plants' ability to adapt.
How does natural selection result in evolutionary change? A new method that dramatically reduces the complexity underlying how genetic information is translated into traits could provide biologists with a key.
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UA Science: A Place of Discovery and Innovation

Joaquin Ruiz, DeanThe University of Arizona College of Science brings together globally prominent faculty in disciplines at the core of scientific inquiry and education. One of the largest colleges at the University of Arizona, we are a nexus of award-winning programs that encourage both independent and collaborative-driven research. Our academic departments, schools and research units encompass the range of physical, mathematical, environmental, cognitive and life sciences. UA Science is among the most powerful and prolific academic research centers in the world, recognized and rewarded for the unparalleled caliber of our achievements. With over 7,500 undergraduate and graduate students, we are an integrative learning institution, where accomplished faculty and next-generation scientists engage side-by-side in groundbreaking research. Our scientists and students also share their knowledge with the local and broader community through extensive outreach and public service initiatives. Our mission is to encourage the aggressive pursuit of research excellence, to support novel teaching and outreach programs and to create economic opportunities for our community.

Joaquin Ruiz, Dean

UA Has the Tools to Analyze Asteroid's Dirt
The arrival of a sample from OSIRIS-REx is still six years away, but the UA's Tom Zega already is preparing for it. Zega will be one of the first scientists to receive the rubble returned to Earth from the asteroid Bennu by the UA-led mission. "Sample return is a treasure trove of information," he says.
UA Scientists and the Curious Case of the Warped Kuiper Belt
The plane of the solar system is warped in the belt's outer reaches, signaling the presence of an unknown Mars-to-Earth-mass planetary object far beyond Pluto. 
Take That to the Bank: How Arizona Plans Its Water Use
Underground storage in recharge projects has built a buffer against future shortages, and an annual publication by the UA's Water Resources Research Center helps to explain it.
Amazonia's Future Will Be Jeopardized by Dams
UA hydrologist Victor Baker and a team of scientists report that the hundreds of proposed dams will have a long-term negative environmental impact throughout the region.
UA to Host Special Events Tied to Asteroid Day
The event will bring together five researchers from the University who work at the forefront of asteroid science, including OSIRIS-REx principal investigator Dante Lauretta.

Workplace Climate Survey

The College of Science is conducting a Workplace Climate Survey for faculty, staff, postdocs and graduate students. The results will be used to help ensure a positive, respectful, and inclusive workplace.

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Undergraduate Research

The research opportunities available to UA Science undergraduates make this college a smart choice for students who want to grow academically, socially, and intellectually.

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Tucson: Science Lives Here

UA Science invites you to experience telescopes atop of Tucson's highest peak, a century-old ecological laboratory and the world-class attraction, Biosphere 2.

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