Experts explain that the movement of air in the atmosphere and natural qualities of the human eye caused him to see markings that were not there.

VOA: special.2010.07.11

Marconi sent the first radio communication signals through the air in eighteen ninety-five.

VOA: special.2010.01.31

Other beautiful creatures also fill the air in Cape May during the fall.

VOA: special.2009.06.01

Traditionally the farms used windows to provide fresh air in the chicken houses.

VOA: special.2009.09.08

His "Music USA" program went on the air in January of 1955.

VOA: special.2009.01.30

Today,the filters clean the air in planes.

VOA: special.2009.07.14

"Our study showed for the first time a clear difference between oxygen and air in the treatment of acute cluster headache.

VOA: standard.2009.12.17

The commercials are the first of many BP ads expected to air in the coming weeks.

VOA: standard.2010.06.10

The M-ATVs are also a major logistical challenge. The Pentagon transports them by air in order to meet the high demand, adding a 10-percent premium to the vehicle's cost.

VOA: standard.2010.08.01

HEPA filters capture almost all particles in the air that are zero point three microns in size or larger.

VOA: special.2009.07.14

Another reason for the increase in bird strikes is the growing popularity of air travel in the United States.

VOA: special.2009.04.01

He says the substances are especially dangerous because they travel through the air and stay in the atmosphere, soil and water.

VOA: special.2009.06.23

He began to turn over in the air when his chute opened, and there were problems with the lines at first.

VOA: special.2009.11.24

Mars Day at the Smithsonian Air and Space Museum in Washington is a celebration of our solar system's most famous planet.

VOA: special.2010.07.28