Secretary Clinton says many people who heard President Obama's Cairo speech five months ago asked how his vision for a new understanding between the United States and the Muslim world would translate into meaningful changes in people's everyday lives.

VOA: standard.2009.11.03

Today we tell you about some new understanding of why cutting the main branch of a plant or tree can lead to better development.

VOA: special.2009.10.13

Their work reveals a lot about songbird genetics, and opens a new door to understanding the basis of human speech.

VOA: standard.2010.04.05

The model works by using a relatively new understanding of the water filtration process.

VOA: standard.2010.08.04