Talk of the Nation on HD-2

The standard picture of the moon is of a long-dead object, geologically speaking. But using observations from cameras on board the Lunar Reconnaissance Orbiter, Thomas Watters and colleagues say in the journal Nature Geosciencesthat there are signs of more recent tectonic activity on the moon, within the last 50 million years.

When doctors autopsied tuberculosis patients, they described finding round, white swellings, especially in and around the lungs. Medical historian Howard Markel describes how those potato-like growths led to the disease being called tuberculosis, from the Latin tuber.

Web browser manufactures often market their products to consumers with an emphasis on privacy, assuring users that their products can better control how personal information is used online. Carnegie Mellon privacy researcher Lorrie Cranor explains that many companies have developed quiet ways to step around some of that privacy-protecting code.

Bloomberg News reporter John Lauerman volunteered to have his DNA sequenced by Harvard researchers to demystify the process for the public. What he didn't expect to uncover was that he possessed two gene variants--one linked to rare blood disorders and the other to a higher risk of Alzheimer's.

Reporting in Environmental Science and Technology, researchers write of harvesting electricity from microbe-rich river sediments--enough to power a small LED bulb. Grant Burgess, a marine biotechnologist at Newcastle University, discusses the hunt for electron-burping bugs.

Photographer and videographer Edward Aites, of Seattle, submitted this time-lapse video to Science Friday. He looked at ice through a macro lens and cross-polarizing filters, and found a colorful, surprising landscape. This is ice like you've never seen it before.

Flu season usually peaks around February. But this year it's missing in action, with the CDC reporting the slowest start to the flu season on record. Peter Palese, a microbiologist at Mount Sinai Medical Center, discusses whether unseasonably warm winter weather may be to thank.

Director Wim Wenders created the 3-D documentary "Pina," in tribute to German choreographer Pina Bausch. When the two met over 20 years ago, they started planning a film that would capture her unique style of modern dance. Bausch died of lunch cancer just days before filming started.

A bill that could legalize same-sex marriage has cleared the Maryland House and is expected to pass in the Senate. A majority of black clergy in the state argue that same-sex marriage conflicts with the teachings of the Bible, but some pastors have spoken out in support of the bill.

Two movies about movies — The Artist and Hugo — are up for the 2012 Academy Award for best picture. Hollywood has a unique way of making films that depict life in Tinseltown. Film buff Murray Horwitz discusses Hollywood films that deal with the glitz, glamor and harsh realities of Hollywood.