It says they should be placed on a separate sleep surface from their parents,without blankets, pillows or other soft bedding.

VOA: special.2009.08.26

Space scientists have collected a wealth of information from spacecraft that have orbited,landed on and dug into the Martian surface.

VOA: special.2010.07.28

The researchers say the report offers evidence that one or more comets were responsible for a sudden cooling period on Earth's surface.

VOA: special.2009.01.20

It is a small device that you move around on a flat surface in front of a computer.

VOA: special.2010.08.01

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

VOA: special.2009.11.04

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

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

VOA: special.2010.03.02

Find a hard surface like a chair and rest your body on it.

VOA: special.2009.08.11

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

VOA: special.2009.07.29

The land surface pokes just a couple of meters on average above sea level, making it the lowest-lying nation in the world.

VOA: standard.2009.10.17

Even civil rights leader Reverend Jesse Jackson admits that on the surface, Gary,Indiana seems an unlikely location for a tribute to one of the world's most popular musicians.

VOA: standard.2009.07.11

"Well,one of the things that's interesting about these flexible sheets is that they can be curved, so you could imagine putting them in unconventional forms, like on the surface of a vehicle or something like that, where you don't have a flat surface."

VOA: standard.2010.02.19