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Rome may have fallen hundreds of years ago, but much of the civilization the Romans built still dots the landscape today. One team of scientists recently unearthed a different kind of Roman artifact that may hold a surprising clue to the empire's downfall.

Fifteen years after the games, the city still benefits from revitalization efforts downtown, like the Centennial Olympic Park with its popular fountain. But overbuilding has contributed to a declining housing market — and many poor communities never got the economic boost they hoped for.

The Occupy Wall Street movement has been criticized for lacking focus — but its main slogan seems to be resonating. That slogan, "We are the 99 percent," highlights the issue of income disparity. It's something economist Jeffrey Sachs has been tracking for a long time.

Alfred Russel Wallace was Darwin's colleague, a globe-trotting naturalist who helped shape the theory of evolution. Thirty years ago, an antique shopper wandered into a modest antique shop in Arlington, Va., looking for Chinese carpets and wound up buying a magnificent rosewood cabinet. It contained Wallace's personal collection of 1,600 butterflies and insects.

Some people describe obesity in the U.S. as an epidemic. But academics involved in fat studies say we're suffering an epidemic of unwarranted fear of being overweight.

How do you, or your older family members keep fit? Do you think there should be more fitness programs geared toward seniors?

To better target non-English speaking communities nationwide, corporate giants like McDonald's and Wal-Mart are creating ads in different languages, including Mandarin, Korean and Vietnamese. As companies build these ad campaigns, they're learning what memes and mediums best appeal to different cultures.

Journalist Peter Beinart supports Israel but thinks the Jewish settlements in the West Bank are compromising Israel's commitment to democracy. He has proposed a boycott of goods made in those Jewish settlements.

A fossil find in a South African cave has scientists both excited and puzzled: It could be the missing link between our ape-like ancestors and modern humans. The mix of primitive and modern traits is also forcing scientists to re-examine the process of human evolution.

Tiny vampire-like hitchhikers are snagging unwelcome rides with holiday travelers. Bedbugs are popping up in places like Lindbergh Field and other airports.