writer Dava Sobel tells the story about longitude and how the problem of knowing it was solved.

VOA: special.2010.07.14

But it was not until nineteen ninety-three that the problem was completely solved using corrective mirrors.

VOA: special.2009.09.30

Wood and coal for fuel. Technology solved many of the problems.

VOA: special.2010.04.15

Many people believed the problem of slavery had been solved.

VOA: special.2009.04.09

Stanford's team solved five problems and finished in fourteenth place.

VOA: special.2010.03.11

Glenn solved the problem by turning off the automatic system.

VOA: special.2009.06.17

But sometimes, when one problem gets solved, another one appears.

VOA: special.2009.10.27

Snow covered everything. Ole the Blacksmith solved the problem.

VOA: special.2009.01.24

The populists solved the problem at their nominating convention.

VOA: special.2010.07.01

He said it is a serious international problem that should be addressed broadly and can not be solved entirely by military means.

VOA: standard.2009.04.13

Until the mystery is solved, Mallorie Wilken is determined to live her life as normally as possible.

VOA: standard.2010.05.12

Mr.Zardari said the fight against extremists in particular is a struggle that will not be solved overnight.

VOA: standard.2009.05.13

Delegates here say climate change is a global problem and can only be solved globally.

VOA: standard.2009.08.31

The French prime minister said the crisis was created by an excess of public debt and that it will not be solved by creating even more.

VOA: standard.2009.03.24