His team is also attempting to produce new food oils and make synthetic parts of every known influenza virus.

VOA: special.2010.07.20

Some economists say this second round of what is known as quantitative easing, or "QE2," has not been effective.

VOA: special.2011.04.29

Later,he wrote some of the best known songs of the civil rights and anti-Vietnam War protests of the sixties.

VOA: special.2011.06.27

They are hoping to surround tornadoes in the second and final year of an international project known as VORTEX2.

VOA: special.2010.05.11

Les Paul is best known for creating one of the first solid-body electric guitars and the eight-track recording device.

VOA: special.2009.09.27

The Smithsonian's National Museum of American History in Washington,D.C., has one of the oldest known pairs of Levi's jeans in its collection.

VOA: special.2009.12.18

This is one of the few photographs known to exist of a very dangerous man named James Miller.

VOA: special.2010.03.17

It is one of the earliest known marble statues of a human from the Greek area of Attica.

VOA: special.2010.08.04

The earliest known copy of the poem in Francis Scott Key's own handwriting is housed at the Maryland Historical Society in Baltimore.

VOA: special.2011.03.07

The experts noted conflicting results concerning a possible link between the disorder and a group of viruses known as murine leukemia viruses.

VOA: special.2011.01.18

The Basel Committee on Banking Supervision has been working on a set of recommendations known as Basel Three.

VOA: special.2010.09.17

A force known as the Army of the West used the Santa Fe Trail to protect American traders.

VOA: special.2009.03.30

Swaziland is said to have the highest known rate of infection for the virus that causes the disease.

VOA: special.2009.05.04

These two artists were linked to a nineteenth century group of painters known as the Hudson River School.

VOA: special.2009.05.01