NSF

Miles below the surface of the planet, Earth is astir with life--microbial life. A team of ASU researchers is working to understand how these organisms get energy. Their work may have applications ranging from finding petroleum resources to cleaning up the environment. --by Nikki Staab

An international research team has discovered traces of oxygen in Earth's atmosphere about 50 million years before expected. The results came as a surprise to the scientific community. --by Diane Boudreau

The desert city of Phoenix depends on an extensive canal system to bring water to farms and homes. But artificial lakes and canal systems along with extensive groundwater pumping have had unintended effects on the ecosystem, scientists say. --by Margaret Coulombe

Greenhouse gases aren't the only factors that contribute to climate change. New research on brown carbons--nanoscale particles released by combustion engines--may help predict the effects of climate change more accurately. --by Joe Kullman

Microbial symbionts live in the guts of animals, the interiors of corals, and the roots of plants. They help plants take up nutrients and help cows break down cellulose, but they can also be harmful to their hosts. Stan Faeth wants to understand the relationship between symbionts, their hosts, and their role in everything from conservation to cancer cures. --by Margaret Coulombe