They made several trips from the landing area to study the surface of the moon.

VOA: special.2009.07.29

With such a vehicle, astronauts could explore a much larger area of the moon's surface.

VOA: special.2009.07.29

The Dead Sea lost thirty-three percent of its surface area during the last half-century.

VOA: special.2009.05.18

This would depend on the total surface area of roofs in a city.

VOA: special.2010.03.02

It has a surface area of almost twenty thousand square kilometers.

VOA: special.2009.08.19