When this happens, one plate moves past the other, suddenly causing the Earth's surface to split.

VOA: special.2010.01.12

The U2 was brought down by an S-2 surface to air missile.

VOA: standard.2010.05.07

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

VOA: special.2009.07.01

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

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

So,at the age of forty-seven she started to glue crushed colored glass in special designs on every surface in her house.

VOA: special.2010.04.14

NASA scientists hope to extend their search for water as deep as five meters beneath the surface of the moon.

VOA: special.2009.09.30

Or,they can be more complex such as using liquid glazes to change the color or shininess of the clay surface.

VOA: special.2009.09.09

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

Volcanic activity broke the large island into pieces that came to the surface of the sea over time.

VOA: special.2009.12.16

LCROSS will then study the soil thrown up to ten kilometers above the lunar surface before it too crashes into the moon.

VOA: special.2009.09.30

Armstrong began to describe what he saw: "The surface appears to be very, very fine grain,like a powder.

VOA: special.2009.07.15

The fluoride mixes with enamel, the hard surface on teeth, to help prevent holes, or cavities,from forming.

VOA: special.2009.03.11