The discovery is exciting because it suggests that the building blocks of life may be more common in the universe than scientists had thought.

VOA: special.2009.09.30

COPD blocks airflow in the lungs.

VOA: special.2010.06.23

After stops in 48 cities in 23 states, the Tea Party Express rolled to a stop just blocks from the White House.

VOA: standard.2010.04.15

In the closing event, Shelly-Ann Fraser jumped out of the starting blocks and never trailed as she crossed the finish line in a world-leading time of 10.73 seconds.

VOA: standard.2009.08.18

These days Old Salem is what's called a living history museum, with exhibits,music, and tours of 18th-Century houses,taverns and Moravian dormitory buildings just seven blocks from the tallest skyscraper in Winston-Salem.

VOA: standard.2010.03.18

Because COPD is an ailment that blocks airflow in the lungs, it is critical that COPD patients often focus on breathing, exercise regularly and learn relaxation techniques, especially when they are short of breath.

VOA: standard.2010.06.21

A key question is whether either chamber of Congress will employ what is called the "reconciliation process" aimed at overcoming filibusters,or blocks, in the Senate on contentious measures where a 60-vote majority is usually required to pass major legislation.

VOA: standard.2009.03.24

"There is a sense that when the political leaders arrive in the next few days, that they will be able to overcome some of the stumbling blocks, because I believe the leaders will be able to really grab this issue by the scruff of the neck and get down to the substance and bridge the remaining gaps,".

VOA: standard.2009.12.17