Over the years,researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.

VOA: special.2009.07.15

But children also need to learn about the possible threats that can be found on social networks and other sites.

VOA: special.2010.04.12

And so that can result in the front part of the eye drying and not staying moist and protected like normal."

VOA: special.2011.08.01

The plan is for Orion to provide astronauts with a spacecraft that can link with the International Space Station.

VOA: special.2010.04.28

The idea is that its removal from the body and purification makes it into something different that can be patented.

VOA: special.2010.04.09

That can put people at risk even in wealthy countries that represent only a small part of the counterfeit drug market.

VOA: special.2010.03.01

Yet businesses are working on machines that can produce tissue and organs a lot like a photocopier copies documents.

VOA: special.2010.10.19

He says there are a number of simple, low-cost interventions that can improve the chances of a full-term birth.

VOA: special.2009.10.26

"Consumer confidence is yes, somewhat shaken I would say amongst some of the Singapore populace, but that can't be helped,I think."

VOA: special.2011.03.29

Some people are found to have cataracts, abnormal growths on the eye that can lead to loss of eyesight.

VOA: special.2009.03.30

They had been interested in thorium -- a radioactive element that can fuel nuclear reactors but not be processed into weapons.

VOA: special.2010.10.15

They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.

VOA: special.2009.03.23

Mister Sharmarke says piracy can only be prevented when Somalia has a government that can enforce its own laws.

VOA: special.2009.04.25

A ceramist creates several flat pieces of clay that can be joined together to make the sides of the container.

VOA: special.2009.09.09