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Everybody knows that there's just one moon orbiting the Earth. But a new study by a team of astronomers concludes that everybody is dead wrong about that. Minimoons, just a few feet across, make regular orbits around the planet. But they don't stick around very long — they're easily pulled away by the gravity of neighboring planets.

Blistering political ads like the swift boat attacks on John Kerry in 2004 may not be as decisive as politicians think. Political scientists say if voters already know a candidate, negative ads don't have much of an impact.

Police in Oakland, Calif., say seven people at Oikos University are dead after a former student opened fire at the school Monday morning. Suspect One L. Goh, 43, is in custody.

Cars manufactured in the United States are getting better. Analysts say it feels like the U.S. has entered a "golden age" of vehicle quality and reliability. Quality has been rising over the years, and the gap between the best and the worst is shrinking.

Cosmetics company Avon has rebuffed a $10 billion buyout offer by Coty — a company known for products like its Lady Gaga and Calvin Klein fragrances. Avon says the Coty bid undervalues the company. Avon has annual revenue of more than $11 billion.

Polar bears live on sea ice but that habitat is slowly disintegrating. Juliet Eilperin of The Washington Post, and Dr. Jeffrey Bonner, President and CEO of the St. Louis Zoo, talk to David Greene about a push to preserve polar bears. The idea is to keep a number of them in captivity to preserve the gene pool .

Within two short weeks, a relatively stable West African democracy has gone from preparing for presidential elections to being taken over by a mutinous military. Add to the mix a rebellion in the north, where separatists have captured the fabled city of Timbuktu.

When a gunman opened fire Monday on students in a classroom at a small college, some tried to escape. In a nearby room, others locked themselves in. At least seven people were killed. At least three others were wounded.

Rachel Veitch bought her Mercury Comet new in 1964. The car's been through 18 batteries and it's outlasted three marriages. Now, her failing eye sight is forcing her to hang up her keys.

Notre Dame faces a juggernaut: the undefeated Baylor Lady Bears and their 6-foot, 8-inch, star Brittney Griner. If Baylor wins, the team will finish the season undefeated and be the first in NCAA basketball to win 40 games in one season.