NPR News

The challenge, launching during the SXSW festival Saturday, asks anyone with an Internet connection to try to create a rocket engine. The 3-D designs can be edited by users around the globe, a model the organizers hope will decrease the cost of space innovation and unleash "untapped potential around the world."

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Neurosurgeons are testing whether electrodes implanted deep inside a patient's brain could help treat chronic anorexia. Doctors are searching for something to help in these hard cases, and a small experiment, with just a half-dozen women, is drawing attention.

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Presidents from Cuba to Iran took turns standing guard around Chávez's casket. Chávez will not be interred; instead he'll be on display in perpetuity.

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Presidents from Cuba to Iran took turns standing guard around Chávez's casket. Chávez will not be interred; instead he'll be on display in perpetuity.

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The Arizona Democrat survived a gun attack and has gone on to campaign for changes in gun laws. "The fact that she went through this obviously horrendous tragedy and has recommitted herself to the political process ... is really inspiring," says Caroline Kennedy.

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Girdles and hormone therapy for grapes? California farmers go to great lengths to plump and firm up grapes as much as possible. But don't worry: None of these techniques hurts the grapes or those who love them.

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It's been 10 years since the U.S.-led invasion of Iraq. That conflict drastically changed the lives of Iraqi women. On International Women's Day, host Michel Martin talks with Iqbal al-Juboori, about how the war affected her personally, and what it's like for women to live in a conflict zone. al-Juboori works to provide job training and life skills to women and their families in rural parts of Iraq.

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Highly trained dogs are part of the U.S. military's fight against improvised explosive devices, which are the No. 1 killer of civilians and troops in Afghanistan. The dogs can search places that high-tech equipment simply can't.

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It's already happened. We humans have already met an intelligent alien. Not only that, we almost certainly had sex with them. And we did here, right here on Earth, not so many generations ago.

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Times were different when he signed the law in 1996, the former president writes in The Washington Post. Today, he says, the act that defines marriage as between a man and a woman discriminates against same-sex couples who have become legally married.

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Texas health officials have quarantined a Nepalese man, who illegally entered the U.S. while infected with a particularly dangerous type of tuberculosis. He traveled through 13 countries, potentially exposing hundreds of people around the world to the pathogen.

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Dianna Hanson was apparently surprised by the big cat as she was cleaning an enclosure and talking on her cellphone to a co-worker.

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Pyongyang steps up its threats in the wake of the latest U.N. Security Council resolutions to clamp down on the North's nuclear program.

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February's jobs numbers were better than expected. The jobless rate is now the lowest it's been since President Obama took office. The rate's recent peak was 10 percent in October 2009.

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The remains of the unknown sailors were found a decade ago in the wreck of the USS Monitor, the United States' first ironclad warship. It sank months after its history-making clash with an iron-armored Confederate ship in 1862.

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The remains of the unknown sailors were found a decade ago in the wreck of the USS Monitor, the United States' first ironclad warship. It sank months after its history-making clash with an iron-armored Confederate ship in 1862.

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Also: Osama bin Laden's son-in-law due in Manhattan court; the two Koreas ratchet up rhetoric; Catholic cardinals expected to set date for start of conclave; Northeast braces for more snow and flooding.

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Also: Marco Rubio's unusual taste in poets; journalist Nate Thayer is accused of plagiarism; and rethinking book acknowledgments.

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After a special Mass, the closed-door gathering to choose a successor to the now-retired Pope Benedict XVI will begin.

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Facebook has unveiled a redesign of its News Feed, but any social network knows that drastic changes come with risks. Just look at Friendster, a site that fizzled after changes to the interface and a subsequent exodus made it less valuable to users.

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