Another recent study found that a single tillage does not harm yield or soil structure in land that is normally not tilled.

VOA: special.2010.09.28

It is considered to be the most unusual geologic structure in the area.

VOA: special.2009.04.15

It was at the Piper Alpha drilling structure in the North Sea.

VOA: special.2009.03.22

The power structure in Kandahar is led by President Hamid Karzai's controversial half-brother, Ahmed Wali Karzai, with alleged links to drug trade and local militias.

VOA: standard.2010.05.28

"The power structure in Kandahar in the eyes of the people of Kandahar is the problem number one, and the Taliban and al-Qaida number two."

VOA: standard.2010.05.28

It was the largest and most difficult structure of its kind ever built when work started in nineteen thirty-one.

VOA: special.2009.08.12

This way,they can observe changes in the structure of a deadly organism from one generation to the next.

VOA: special.2010.06.29

They used light-sensitive molecules to turn on and off nerve cells in the deep brain structure of mice.

VOA: special.2009.04.07

The round stone structure honors people from the District of Columbia who died in World War One.

VOA: special.2009.05.25

He had shared a Nobel Prize for his part in the discovery of the structure of DNA.

VOA: special.2010.03.23

Several different species of coral can be present in the different colonies that form the reef structure.

VOA: special.2010.08.10

Its creators said it is the longest chemically designed DNA structure ever produced in a laboratory.

VOA: special.2010.07.20

"Then the structural engineers take that information and they use it to detail the building in terms of, is this going to be a steel structure?

VOA: special.2011.03.28

It is narrow in the middle. On top is a large ring-like structure.

VOA: special.2009.03.04