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Many animals get their external marking -- such as, feathers, hair or scales-from genetics. But it turns out, the crocodile gets its head patterns differently. (Story aired on ATC on Dec. 11, 202.)

The rivalry between Newt Gingrich and Mitt Romney took on a life of its own as they squared off Saturday night. The jabs even got personal. The sparring was expected between the GOP candidates — the top two in most polls — as each hopes to win the upcoming Iowa caucuses.

Though he went on to a string of Top 40 solo hits, Art Garfunkel is still best known as half of a legendary duo. With the release of a new retrospective, which covers his work from Simon & Garfunkel's heyday through the present, Garfunkel says he's looking for some long-overdue credit.

Coal is poised to replace oil as the world's top energy source — possibly in the next five years, according to the International Energy Agency. The rise will be driven largely by growth in China and India, the IEA says, while the only large decline is seen coming in the United States.

When researchers asked hospitals how much a total hip replacement would cost a 62-year-old woman paying cash, a surprising number couldn't or wouldn't say. Health care could learn something from the car industry about working with consumers, critics say.

Women on the Senate and House Armed Services committees are leveraging their clout in response to the problem of sexual assaults in the military.

The world's top health problems are more common in men than women. But recent global funding has been skewed toward women's issues. Some health economists say more effort should go toward stopping men's risky behaviors, like smoking and drinking.

Raised on the South Side, Manzarek brought Chicago sound to L.A.'s beaches with the trailblazing band. He died Monday at age 74.

In the surreptitious recording, the top Republican and his aides disparage actress Ashley Judd. The liberal SuperPAC Progress Kentucky was created in December 2012 and, according to records, raised just $1,005 last year. It spent only $18.

After President Obama and House Speaker John Boehner's face-to-face meeting, there's talk about an agreement soon being struck. But every such analysis also comes with many caveats.