Fans tailgate outside Heinz Field in Pittsburgh before an NFL divisional playoff football game between the Baltimore Ravens and Pittsburgh Steelers, Saturday, Jan. 15, 2011.
Antonio Garcia re-stocks the beverages at The Corner Market in Washington, D.C., in 2010. Study author Jean Welsh says that sweetened beverages tend to be the biggest source of added sugar.
A Dutch man rides his bike by windmills in Kinderdijk, the Netherlands in 2007. Dutch researchers have found that the ability to ride a bike can help doctors distinguish between two similar forms of Parkinson's disease.
A study that measured antibodies and the disease history of more than 200 kids found that two doses of vaccine were 98 percent effective in preventing chickenpox compared with 86 percent for a single dose.