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As part of a research initiative on how to harness off-grid energy for low-power electronics, a pair of U.K.-based designers created a lamp that uses gravity to generate light. Martin Riddiford, co-inventor of the GravityLight, talks about plans for the innovative project.

In the Broadway play The Other Place actress Laurie Metcalf ("Jackie" on the TV show "Roseanne") plays a scientist suffering from the dementia she studies. Playwright Sharr White discusses the play and the challenge of presenting complicated science on a theater stage.

As Mexican culinary traditions follow migrants around the world, mole is earning legions of fans.

The Food and Drug Administration just approved a flu vaccine made by cells taken from the fall armyworm, an agricultural pest. The cells produce copies of a piece of the flu virus's outer coat that primes the immune system. Conventional vaccines use the whole virus and take longer to produce.

It's the season of giving, especially when it comes to end-of-year charitable donations. But how do you know that your money is getting into the right hands? Host Michel Martin gets some useful tips on vetting charities from Ken Berger, president and CEO of Charity Navigator.

Mexican-American singer Jenni Rivera was killed in a plane crash over the weekend. She's remembered as a legendary vocalist, selling over 15 million albums, and earning three Latin Grammy nominations. Host Michel Martin pays tribute to Rivera with Jasmine Garsd, co-host of NPR's online music program, Alt.Latino.

Without a solution to the so-called fiscal cliff, every person who gets a paycheck or has investments will see his or her taxes rise. And some could see their jobs disappear. Here is a timeline of changes in store in the absence of action from the president and Congress.

In his article for The New Yorker, journalist Raffi Khatchadourian tells the story of a secret program that tested nerve gas, LSD and other drugs on 5,000 American soldiers throughout the 1950s and '60s.

In The Generals, Thomas Ricks examines U.S. military leadership from World War Two to the present day. He concludes that the mistakes in Iraq and Afghanistan can be traced to the Army's inability to come to terms with all the lessons of Vietnam.

The Supreme Court has chosen to hear two cases relating to same-sex marriage that would judge the constitutionality of the federal Defense of Marriage Act and California's Proposition 8. Washington Post opinion writer Jonathan Capehart argues that this is not the best time for a marriage equality ruling.