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As expected, the harder punches had to do with Mitt Romney's work at Bain Capital, which Rick Perry referred to as "get-rich schemes."

Audie Cornish talks with Thomas Haupt, respiratory disease epidemiologist for the Wisconsin Division of Public Health. He's the lead author of the study that helped uncover the source of a mysterious and large uptick in Legionnaires' disease cases. The study, "An Outbreak of Legionnaires Disease Associated with a Decorative Water Wall Fountain in a Hospital" was published in the online journal Infection Control and Hospital Epidemiology.

Commentator David Was has a prescription for election-year sensory overload: a cappella music.

What if your New Year's resolution to get more exercise could be fulfilled — by taking a pill? That's the far-flung idea suddenly brought much closer to reality by the discovery of a hormone called irisin, which is produced by the human body in response to exercise.

Listen to charming synth-pop tracks from the singer's latest album, Bright and Vivid.

Participation in long-distance running events has doubled over the past decade, and race-related cardiac arrests have increased, too. Even so, the risk is low, a study finds. Undiagnosed, pre-existing heart conditions are the biggest source of trouble.

Cadillac is drawing notice in the luxury car scene with its new ATS model, a small, high-performance car that directly competes with the likes of Audi and BMW. The stakes are high for GM. Luxury cars like the ATS bring in more profit per car than small economy models like the Chevy Cruze.

Iran has threatened to close the Strait of Hormuz, the strategic waterway that handles 20 percent of the world's oil, in retaliation for a new round of sanctions. Experts say Iran has low-cost options, such as mines, to wreak havoc and potentially close the strait.

Food producers rely on private auditors, not the FDA, to make sure they are following food safety rules. But the auditor of the Colorado melon farm that was the source of last year's fatal outbreak not only gave the farm a rave review, he also recommended changes that may have caused the problems.

Gov. Haley Barbour's orders ignited controversy because they included pardons for some convicted killers. Now a judge says they may have violated the state's constitution.