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If these results are correct then we would have to go back and start rebuilding pretty much all of modern foundational physics.

NPR's Mara Liasson joins Michele Norris to talk about Thursday's Republican presidential debate in Florida.

Some users were caught off guard by the revamped Facebook News Feed — and the changes won't stop coming.

Cernan, the last man to step foot on the moon, said the country's space program was on a "path of decay."

As a young man in Virginia, Earl Reynolds once shined James Brown's shoes. And that chance meeting helped prod him into making a tough choice about his own future. For a while, Brown's advice even led to a rift between Reynolds and his father.

Syria's government is quashing protest online as well as in the streets. Host Audie Cornish talks to NPR's Deb Amos in Beirut to expand on what the success of the Syrian Electronic Army means for the momentum of the opposition protests and the state of play inside Syria.

The Palestinian push for statehood recognition has sparked fears of new violence in the West Bank. Neither Palestinians nor Israelis appear content with the security provided by their own governments, and "Neighborhood Security Watch" groups have been formed by both groups. While settlers are trained by the Israeli Defense Forces, Palestinians are forming teams to monitor, document and detain settlers they believe will seek out attacks. Sheera Frenkel reports.

Businessman and former radio talk show host Herman Cain pulled off an upset Saturday. He came in first in the Florida straw poll, handily beating both Texas Gov. Rick Perry and former Massachusetts Gov. Mitt Romney. It's a big victory for a candidate who, up to now, has drawn little media attention and placed fifth or sixth in many national polls. Host Audie Cornish talks with NPR's Greg Allen about whether this marks a change in the Republican presidential nominating contest.

The Delta II rocket that launched earlier this month carrying satellites to study the moon sent NPR science correspondent Joe Palca on a mission of his own: to find out why the rocket had two extremely precise lift-off windows, each just one second long.

One year ago, German cybersecurity expert Ralph Langner announced he had found a computer worm designed to sabotage a nuclear facility in Iran. The Stuxnet worm is now recognized as a cyber-superweapon, and it could end up harming those who created it.