Yet researchers from Stanford University say new treatments are often no better than existing ones, but are almost always more costly.

VOA: special.2009.08.14

It says ultraviolet radiation from the sun can reach you on cloudy days, as well as bright and sunny ones.

VOA: special.2010.07.06

Prices differ from school to school, but public colleges and universities usually cost less than private ones.

VOA: special.2009.01.22

They looked at ones from Asia.

VOA: special.2009.01.20

And I don't think our interests are any different from the American ones in terms of North Korea."

VOA: standard.2009.12.08

The ones I was looking at were in New England from the 1700s.

VOA: standard.2009.04.21

He told a gathering in Washington recently the alliance is doing important things to ensure its security from conventional threats and from new ones like terrorism, piracy and cyber attacks.

VOA: standard.2010.06.11