The discovery is exciting because it suggests that the building blocks of life may be more common in the universe than scientists had thought.

VOA: special.2009.09.30

They say exposure at levels common among children in the United States may increase the chances that a child will be diagnosed with A.D.H.D.

VOA: special.2010.05.26

Common changes in atmospheric conditions also can be responsible.

VOA: special.2011.05.03

It can show to society that we can do what common people do, so that marginalization against HIV positive people in society can be reduced through football."

VOA: standard.2010.04.01