Doctors do not yet know why this is true.

VOA: special.2010.06.15

And,that is why this campaign is so important." But that view is out of step with many in war-weary Britain.

VOA: standard.2009.08.02

"I think we have to explain why this alliance that was started 60 years ago for a totally different reason is something that's important now.

VOA: standard.2010.06.11

"Exposure to tobacco smoke is a risk factor for cardiac disease already in adolescents, and that's why this study supports that children and adolescents need smoke-free environments."

VOA: standard.2010.03.04

And we work with parents and community residents to really understand why this is so important, and for them to hopefully demand these healthy foods and places to exercise in their own communities."

VOA: standard.2010.06.23

Uganda's main opposition leader this week asked why Uganda and Burundi are providing troops while other African leaders ignore the problem.

VOA: special.2010.07.17

Tired of waiting, he told the ground crew: "Why don't you fellows solve your little problems and light this candle."

VOA: special.2009.06.17

This is why there are white and light colored buildings in many warm areas of the world.

VOA: special.2009.06.19

This could explain why Taiwan has a large number of small earthquakes, but rarely a major one.

VOA: special.2009.07.07

This kind of joint pain is the reason why dengue fever is sometimes known as breakbone fever.

VOA: special.2009.05.26

"The Calling" included this song which she performed at the fortieth anniversary concert, "Why Shouldn't We?"

VOA: special.2010.04.19

"My father," Beatrice said weakly, "why did you do this terrible thing to your own child?"

VOA: special.2009.05.30

Experts say this is why it is important to eat a mixture of foods every day, to get enough of the vitamins our bodies need.

VOA: special.2009.04.21

This might explain why he is probably better known overseas than in the United States.

VOA: special.2009.11.10