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Nanotechnology is the science of designing materials, atom by atom. It promises revolutionary applications for everything from the military to sports. NPR's David Kestenbaum investigates whether nanotech products already on the market are all they're cracked up to be.

Curtis Elledge, a research flower grower from Santa Cruz, Calif., presents a global selection of picks from the Dutch band The Ex to French "musique concrete" by Louis Sclavis.

The defense rests in the court-martial of Army Spc. Charles Graner, charged in the abuse of Iraqi prisoners at Abu Ghraib. Graner did not take the stand, despite saying that he planned to testify. Hear NPR's Jackie Northam.

Scientists who've been studying the 3,300-year-old mummy of King Tutankhamen say computerized scans contradict the long-held theory that a blow to the head killed the boy pharaoh.

NASA's Deep Impact spacecraft sets off on a 268-million-mile collision course with a comet. If all goes as planned, the craft will crash into Comet Tempel 1 on July 4, releasing particles that could provide a glimpse into the origins of the solar system. NPR's Melissa Block discusses the mission with Dr. Donald Yeomans of NASA's Jet Propulsion Laboratory.

Ireland's economic boom has made the once-neglected town of Kinvara a target for developers. And even as it grows again, Kinvara has returned to an ancient tradition: music, rendered by fiddles, banjos and songs. Frank Browning reports for the documentary series "Worlds of Difference."

Recent debate over the intelligence reform bill raised to a national level the divisive issue of granting drivers' licenses to illegal immigrants, but states have been struggling with the problem for decades. The central question is how to protect public safety without rewarding illegal entry. NPR's Carrie Kahn reports.

Clarinetist Don Byron is known for musical experimentation with classical compositions, Latin dance grooves, hip-hop and more. Now he returns to a first love, jazz, with a CD dedicated to saxophonist Lester Young.

CBS News fires three executives and a producer over their roles in a flawed story about President Bush's National Guard service. An independent review gives a detailed look at how the story came to be broadcast on that edition of 60 Minutes Wednesday. NPR's David Folkenflik reports.

As millions of dollars flow into aid organizations helping the victims of the tsunami, newspapers and Web sites continue to list mostly the largest and most reputable relief organizations. But some people have begun to suggest donations to smaller, indigenous grassroots organizations. NPR's Margot Adler reports.