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The short supply of a key drug to treat lymphoma forced doctors to switch to another medicine. Now researchers have documented that the fallback drug wasn't as good a choice as many doctors thought.

In 2007, Prince William County, Va., voted to step up police checks aimed at driving out illegal immigrants. The move sparked local outcry and national attention, but five years on, supporters and opponents differ on whether the policy has been a success.

There were 138 toothbrush-related patents filed this year in the U.S. Why so many new ideas? "Cleaning the teeth is actually a pretty complex problem, and I think that's why there's been so much invention around it," says the head of Colgate's global toothbrush division.

Go! Pop! Bang! is grounded in the Baltimore club sound — super-danceable, lots of bass and crazily fast rapping. Rye Rye's debut album was all set to be released in 2009, but then sweeping changes in her life got in the way.

The Mayan people in Latin America received a lot of attention when word spread their ancient calendar had predicted the world would end on Dec. 21. The tourists that came to visit Mayan sites have gone home, and the modern-day Mayas go on with their lives marked by high rates of poverty and a dependence on migration.

The presence of fast food joints on hospital campuses often conflicts with wellness efforts. Long-term leases have made it difficult for these facilities to kick the restaurants out. But some hospitals are managing to give burgers and fries the boot.

Accused by Republicans of running an agency that issued "job-killing regulations," Jackson has faced stiff political opposition in her four years at the Environmental Protection Agency.

To keep pace with the nation's increasing racial and ethnic diversity, the Census Bureau could change how it asks about identity in the 2020 count.

New York Mets pitcher R.A. Dickey is currently the only knuckleball pitcher in the major leagues. His memoir, Wherever I Wind Up, explains how his life — and career — have mimicked the unpredictable trajectory of the difficult pitch he throws game after game.

Zany presidential candidates, Clint Eastwood's chair, and vice-presidential trips to Costco. 2012 was a significant, and perhaps odd, year for politics. Host Michel Martin is joined by former White House staffers to review some of the best and worst political moments of the year.