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This year's auto show in Detroit could set the stage for a shake-up in the fiercely competitive — and hugely profitable — luxury car scene. That's because there's a new kid on the block, and its name is Cadillac.

The General Motors company says its new small, high-performance ATS will allow it to compete for the first time with Audi, Mercedes-Benz and BMW. But getting a brand-new luxury car like the ATS ready for market can be a grueling process.

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.

Irisin may hold some of exercise's key benefits that relate to obesity and Type 2 diabetes, researchers say.

"The House Ethics Committee said Wednesday it needs more time to consider sexual harassment allegations against Rep. Alcee Hastings (D-Fla.)," The Associated Press writes, "but released a report in which the alleged victim detailed a pattern of sexually suggestive remarks and unwanted hugs."

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. 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.

The next 40-some weeks or so are going to be a screaming tower of political babble, a cacophony of accusing and boasting, pandering and slandering. I watch the news these days with the mute button permanently depressed, lest I fall into a permanent depression myself. There's only so much contention and vitriol a sensitive soul can bear.

Ever wondered who the big greenhouse-gas emitters are in your neck of the woods? The answer is now just a click away.

The US Environmental Protection Agency today unveiled a new website that identifies most of the nation's biggest emitters of carbon dioxide, methane and other greenhouse gases. It lets you, for example:

Parts of Nigeria are under a 24-hour curfew, after demonstrations against a government policy to end fuel subsidies turned into a fiery rampage in the city of Minna. The BBC reports that "hundreds of rioters set fire to government and political party offices and also targeted the homes of local politicians."

The AP lays out the basics of how we got here:

Did pollsters underestimate the strength of Rep. Ron Paul's New Hampshire support because they didn't include enough younger voters or independents in their samples?

Yes, argues Stefan Hankin, a Washington, D.C. based pollster in a piece on the Campaign and Elections website.

As we've said before, to figure out what the Federal Reserve means when it reports about how the economy is doing and whether policymakers think it's doing better or worse, you need to carefully compare the central bank's latest words to what it has said in preceding months.