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Commentator Brad Klein tells the story of a treetop mimic in New York City's Central Park. For several years, careful birdwatchers noticed that they heard the Black-Throated Green Warbler weeks before they saw it. This puzzled them -- until someone noticed that the Warbler's song was alternating with that of the White-Throated Sparrow.

NPR's Technology Correspondent Larry Abramson reports on robots from the Artificial Intelligence Laboratory at MIT.

Veteran Broadcaster Robert Trout casts back to his early days as a reporter covering politics, to tell the story of the Republican Party's slide from a majority party to the minority in the 1930's and 1940's. For its first seventy years, the GOP was the dominant party. But from Hoover's loss to Roosevelt in the 1932 presidential election until now, Republicans have been playing catch-up to the Democrats. This is the first of two reports.

NPR's Howard Berkes explores the rush to harness energy from wind during a visit to the town of McCamey, the Wind Energy Capital of Texas, where hundreds of wind turbines are going up on every available mesa.

As the global economy knits countries closer together, it becomes easier for diseases to spread through states, over borders and across oceans doing serious damage to vulnerable populations. American RadioWorks and NPR News present a series on this lethal side effect of globalization.

NPR's Joanne Silberner reports on a 1946 outbreak of foot-and-mouth disease in Mexico. Families traveled south from the U.S. to help stop the epidemic. Now in their 70's and 80's, they still get together each year to remember the work that took them to some of the most remote places in Mexico.

Host Bob Edwards highlights a new exhibit at the National Postal Museum in Washington, D.C. The exhibit offers a window into a unique relationship that developed through correspondence. Some Japanese American children forced into internment camps after the bombing of Pearl Harbor exchanged many letters with a San Diego librarian named Clara Breed.

Marvin Gaye's classic faced the forces shaping American culture at the beginning of the '70s.

Changing Face of America's three-day series on homeschooling surveys three familes across the nation, exploring their reasons for choosing home-based education as well as the teaching methods they employ. There are as many approaches to homeschooling as there are familes doing it.

Jason Bezis, a law student at the University of California at Berkeley, has always harbored a special appreciation for our first president. He wants the nation to refer to our annual Februrary federal holiday by its given name: Washington's Birthday.