We continue the story of Marian Anderson and how she went on to gain great success as a singer.

VOA: special.2009.01.18

But they continue to debate the early evidence of music because few archeological objects exist to prove how music developed and spread.

VOA: special.2009.08.18

But scientists disagree about how much sea levels could rise if Antarctica's ice sheets continue to melt.

VOA: special.2009.06.03

Sarah began to think about how she was going to continue to earn money in the future.

VOA: special.2010.03.28

There are no cures, but researchers continue to learn more about how the feared virus works.

VOA: special.2009.02.23

Researchers continue to make discoveries about how monarch butterflies travel to the same area each year.

VOA: special.2010.04.27

Experts continue to debate how best to close this digital divide.

VOA: special.2010.04.12

And mixed economic signals continue to call into question how long it will take for the country to emerge from recession.

VOA: standard.2010.01.06

Colin Macpherson, a professor of Earth sciences at Britain's Durham University, says it's impossible to know how long the volcano will continue to erupt.

VOA: standard.2010.04.16

"There is still support, but at the same time, there is growing desire to know how long this support should continue and the result."

VOA: standard.2010.05.26

How can the unemployment rate continue to rise sharply while job losses are growing milder?

VOA: standard.2009.06.07

But round after failed round of Egyptian-mediated talks to reconcile the Palestinian factions Hamas and Fatah continue to underscore how little even traditional leader Egypt can accomplish.

VOA: standard.2009.11.03

Asian stocks rose after the DOW Jones industrial average passed the psychologically important Cohen says it is not clear how much longer markets can continue the strong gains, but says it is unlikely they will return to the crisis environment of the first quarter of this year.

VOA: standard.2009.10.15