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Rep. Lamar Smith of Texas is formally investigating a recent study on global warming. Smith calls the timing of the study's publication "suspicious," but many scientists call his tactics "bullying."

Stock markets rallied on Friday, but it was not enough to erase the losses from earlier in the week. Investors are fretting that the recent market turmoil could mean another recession.

One of the last of the trials of Nazi guards has begun in Germany. NPR's Linda Wertheimer talks to Rabbi Marvin Hier of the Simon Wiesenthal Center about their future after these prosecutions end.

Hany Farid co-developed the technology that tracks child pornography. He tells NPR's Scott Simon that similar software could be used to track terror content if tech companies were willing to use it.

Many people check up on hospitals before they check in as patients. But there's a catch. A hospital that gets lauded by one group can be panned by another.

A parade of Republican presidential hopefuls took turns blasting the Obama administration but showed their differences on energy subsidies at the Iowa Agriculture Summit in Des Moines Saturday.

More than 5,000 pregnant women appear to have fallen sick with the virus. But there are no good tests for the birth defect possibly linked to this disease.

The road to the White House now turns South. NPR's Linda Wertheimer speaks with South Carolina political scientist Scott Huffmon about what candidates from each party must do to win in his state.

To mark International Women's Day, the Vatican is opening its doors to a group of women pushing for a greater role in the Catholic Church. The organizers hope to raise issues of church inequality.

Nicolas Maduro is expelling most U.S. diplomats and demanding Americans secure visas to enter the country. Critics say it's an effort to draw attention from the nation's economic meltdown.