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"Office hours are some of my favorite hours of the week," says professor Tom Carlson, a medical doctor, ethnobotanist and instructor of 1700 students annually at the University of California, Berkeley. One of Carlson's former students, SciFri associate senior producer Christopher Intagliata, says Carlson's class got him on the path toward science. In this "Teacher Feature," Intagliata tells his former teacher what the class meant to him.

Scientists are trying to figure out how chemicals in the air interact with each other to make people sick. So they're building an instrument — a "lung in a box" — that goes way beyond the usual chemical monitors.

New technology is changing the way cities are run, with cutting-edge urban innovations around the globe. Sprawling, chaotic Rio de Janeiro has built a state-of-the-art operations center as it gears up for two major events.

June 2nd is National Cancer Survivor’s Day. Judy Pearson of South Haven is a breast cancer survivor and the co-founder of the Women Survivors Alliance.…

Syrian President Bashar Assad says his country has received advanced missiles from Russia. The Russians say they are just fulfilling old contracts and argue that the S-300s are a defensive system that can't be used against rebels. But the timing of this shipment complicates Secretary of State John Kerry's work with Moscow on pushing for a peace conference. The U.S. and Russia seem to be working at cross purposes.

It sounds like something from the movies — scientists uncover a sample of plant material frozen inside a glacier for hundreds of years, bring it back to the lab, and watch as it comes back to life. Catherine LaFarge describes the work, and what it means for plant scientists.

Along with six dozen fellow U.S. Army nurses, Manning was captured while treating soldiers in the Philippines in 1942. The nurses, held prisoner for 33 months, were known as the "Angels of Bataan and Corregidor."

Native American groups are challenging the exclusive trademark protection for the Washington Redskins, saying the NFL team's name is a racial slur. If the judge rules in the groups' favor, the team could lose millions of dollars from the sale of licensed merchandise.

Our panelists tell three stories about government making cash cool again.

Bill reads three headlines for the panel, they have to pick the real one.