Today we tell about one of the most important scientific discoveries of the last century -- the development of HeLa cells.

VOA: special.2010.07.21

Bob Doughty and Faith Lapidus tell about some of the winning American athletes on and off the ice and snow.

VOA: special.2010.02.26

"About half of our business is done in the last quarter of the year, in the last three months.

VOA: special.2009.12.25

It is a collection of linked short stories about the lives of very rich and very poor people in Pakistan.

VOA: special.2010.01.01

About half of those laid off were teachers, says John Deasy,the head of the Los Angeles Unified School District.

VOA: special.2011.05.05

But they said evidence was lacking about cases of Alzheimer's in curry users, compared with people who did not use curry.

VOA: special.2009.05.19

Yet up at about five-thousand-four hundred meters the air pressure is only about half of what it is on the ground.

VOA: special.2011.04.06

It says citizen cooperation after publicity about the crime has resulted in the capture of about forty percent of the suspected criminals.

VOA: special.2010.05.05

The goal of the Stardust-NExT spacecraft is to gather scientific evidence about one of the solar system's most changeable objects -- comets.

VOA: special.2011.02.09

However,join us next week when we tell about two of the most dangerous gunfighters of the Old West.

VOA: special.2010.03.10

Today we tell you about one of the few prisons in America that offer college-level classes: San Quentin State Prison in California.

VOA: special.2011.07.07

In the United States, about half of all young people use social networking sites like MySpace and Facebook.

VOA: special.2009.02.18

And the third reason was the publishing of rumors about the moral behavior of the French royal family.

VOA: special.2009.04.20

Experts say the situation is likely to continue until investors feel more sure about signs of economic recovery.

VOA: special.2009.08.21