At the same time, hot liquid rock from deep in the Earth pushed to the surface.

VOA: special.2009.01.07

Since then, scientists have been studying the ship and bringing to the surface many of the artifacts -- things made by hand -- that they have found.

VOA: special.2011.07.26

Charles Conrad and Alan Bean flew the lander craft to the surface.

VOA: special.2009.07.29

Better pumps were built to raise the water to the surface.

VOA: special.2010.04.15

Water carries body heat to the surface of the skin.

VOA: special.2010.07.27

The pupas rise to the surface of the water.

VOA: special.2009.05.26

Alan Bean followed Charles Conrad to the surface.

VOA: special.2009.07.29

"Now,I understand that some believe that we should attempt a return to the surface of the Moon first, as previously planned."

VOA: standard.2010.04.21

But three of the four vents remain open,still spewing thousands of barrels of oil to the surface.

VOA: standard.2010.06.08

To explore the surface of the moon, astronauts must be able to survive outside the protection of their spacecraft.

VOA: special.2009.07.01

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

In the study, scientists placed highly sensitive measuring equipment two hundred to two hundred seventy meters under the ocean's surface.

VOA: special.2009.07.07

Scientists have long believed that Earth's satellite lacks the ability to hold water near its surface because it has no atmosphere.

VOA: special.2009.09.30

NASA used its Lunar Crater Observing and Sensing Satellite,or LCROSS, to look for water deep beneath the lunar surface.

VOA: special.2009.12.30