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An experiment confirms that a weird tribe of particles known as neutrinos actually change from one form into another as they journey about the cosmos. Neutrinos seem to pass through any object. If that's really the case, are neutrinos cursed to wander the universe in solitude forever?

Last year, Tennessee dropped some 200,000 people from TennCare, its health plan for the poor and uninsured, and reduced benefits for hundreds of thousands more. In Cocke County, one of the state's poorest, the repercussions are felt far and wide.

There are plans to bring a new dump to Uniontown, Ala., where the county commission approved the project because the area desperately needs jobs. Commentator John Fleming says this is the kind of case that has been labeled "environmental racism."

Ernesto Miranda, aka "Smokey," was a co-founder of the infamous Mara Salvatrucha gang in Los Angeles. At 38, he was studying law and working to keep kids out of gangs. All that ended Saturday night, when he was shot to death, apparently in retaliation for his anti-gang efforts.

Tulane University in New Orleans held its graduation ceremony Saturday after a traumatic year. Students who held on through Katrina and nine months of recovery heard advice and admonitions from former Presidents Bill Clinton and George H.W. Bush.

Nigeria's Senate kills a proposed constitutional amendment that would have allowed the country's president to run for a third term. Critics said the proposal would widen regional, ethnic and religious rifts. They hailed its failure as a victory for democracy.

A report in Thursday's USA Today reveals that the National Security Agency (NSA) has been secretly collecting records from AT&T, Verizon and BellSouth documenting phone calls within the United States. The agency reportedly wants to create a database of calls to help track terrorist activity. Madeleine Brand speaks with USA Today reporter Leslie Cauley, who broke the story.

John Ydstie talks with Amanda Congdon, the host of Rocketboom. It's an online newscast of the weird and wonderful. Congdon and Rocketboom have gained a cult following for its offbeat look at the news and the Internet.

Commentator Ruth Levy Guyer reflects on the power of wind -- to spark life by spreading seeds, to cause disease by spreading pathogens, and to disturb the psyche. Guyer teaches courses in bioethics and infectious diseases at Haverford College.

John McPhee has written at length about fish, geology, oranges, nuclear power, basketball... and the list goes on. At 75, the great reporter feels he has plenty of words, characters and subjects left to explore.