Talk of the Nation

Every year thousands of scientists visit Antarctica. Some study the gas plume from the active volcano, Mount Erebus. Others map the ever-changing ice caves. But they all face the same challenges of working on extreme terrain. Two researchers and a photojournalist discuss how research is done on the frozen continent.

From the tsunami-damaged Fukushima nuclear power plant to the end of NASA"s shuttle program, a great deal of science stories made headlines this year. Science writers Mariette DiChristina, Matt Crenson, Steven Levy, and Paul Raeburn join Ira Flatow to discuss the year's top stories in science.

Twin GRAIL spacecraft on a mission to study lunar gravity are nearing the end of their almost four month journey. The probes are expected to reach the moon on New Year's Eve and New Year's Day. GRAIL's principal investigator, Maria Zuber of MIT talks about the data they hope to collect.

Nearly two million home health care aides help seniors and people with disabilities to live independently. These caregivers often work long hours doing difficult work without overtime pay. The Labor Department has proposed rules to bring home care aides under federal minimum wage and overtime protections.

A child of Sri Lankan immigrants, music journalist S.H. "Skiz" Fernando, Jr. grew up eating Sri Lankan food regularly. But he didn't master the art of the cuisine until he moved to his family's homeland and enlisted the expertise of his four aunts.

For one year, Fernando spent his mornings scouring local markets for the best spices and ingredients. He then cooked for hours, using old cookbooks and family recipes. His aunts critiqued the dishes until Fernando perfected them — meaning Fernando ended up making each recipe at least 20 times.