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Republican presidential hopeful Rick Perry has been aboard a bus touring Iowa hoping to score an upset in next Tuesday's caucuses. Perry spent Thursday trying to reverse the surge that challenger Rick Santorum has seen in a recent poll.

In Thomas Caplan's latest novel, The Spy Who Jumped Off the Screen, Ty Hunter, a spy-turned-movie star, is called back to service at the U.S. president's behest. The book is Caplan's third work of fiction, and an early draft got a little editing help from the real-life ex-president.

Physicists have found a way to turn a smartphone camera lens into a microscope and a spectrometer. They say both could be handy for doctors in remote areas with few laboratories who need to look at blood samples.

'Better for you' food products drove more than 70 percent of food company sales growth in the last five years, a new analysis says. Although a food activist suggests that the numbers could be a bit misleading.

A new study documents significant fluctuations in the IQs of a group of British teenagers. The findings bolster the theory that the IQ test isn't a measure of a person's "fixed" intellectual capacity but rather, a gauge of acquired knowledge that progresses in fits and starts.

One of the worst droughts on record is straining endangered species of minnows, so biologists are taking action. They plan on catching the fish to move them to a hatchery.

Five presidential candidates appeared at the opening day of the Values Voter Summit in Washington, D.C., on Friday, but the speech getting the most attention was one by a pastor from Dallas who introduced Texas Gov. Rick Perry.

An Afghan employed by the U.S. government was shot dead after he turned his weapon on his American colleagues, according to a U.S. Embassy statement. Another U.S. citizen was wounded in the shooting around the former Ariana Hotel, which ex-U.S. intelligence officials said is the CIA station in Kabul.

The state isn't ending the practice of granting a condemned prisoner basically anything he wants because of the cost. It's being done because it's no longer thought to be appropriate.

The Black Keys just released a new album called El Camino. Rock critic Ken Tucker says that, while the album retains the band's roots in blues and R&B, it's also reaching out to a wider audience with its pop and rock touches.