The exploration vehicle will be able to measure methane even at very low levels in many places on the surface.

VOA: special.2009.12.30

The three men had found one of the largest amounts of gold ever discovered lying on the surface of the Earth.

VOA: special.2009.02.04

Embroidery work involves using colored yarn and a needle to create designs on the surface of cloth.

VOA: special.2009.11.04

The carbon dioxide enters the plants through tiny holes or pores on the surface of leaves.

VOA: special.2010.01.26

Cleveland's Cuyahoga River caught on fire because of industrial wastes on the surface of the river.

VOA: special.2011.07.31

The areas the printmaker cut away will be lower on the surface of the wood.

VOA: special.2009.09.02

He said he could see changes in the seasons on the surface of Mars.

VOA: special.2010.07.11

The designs and images on the surface of a tapestry are woven into the cloth as opposed to being only on the surface of the cloth.

VOA: special.2009.11.04

Because it's another thing that sounds like on the surface is a great idea."

VOA: special.2010.06.17

The two astronauts explored an area that they called Tranquility Base. Lack of space in their lunar spacecraft,the Eagle, forced them to leave equipment on the surface.

VOA: special.2010.03.02

"Widespread water has been detected on the surface of the moon."

VOA: special.2009.09.30

Crews then turned to placing a cap over the pipe -- not to stop it, but to direct at least some of the oil to ships on the surface.

VOA: special.2010.06.04

Just before leaving, they placed a metal sign on the surface.

VOA: special.2009.07.29

One involves landing on the surface of the planet Mercury.

VOA: special.2010.05.25