Each side of these devices blocks a set of images that appear in a different form of polarized light.

VOA: special.2010.01.26

A set of threads called the warp form the base of the cloth.

VOA: special.2009.11.04

They are set into the earth. They meet to form a wide V.

VOA: special.2009.05.25

Autism is a set of disorders, along a wide spectrum, that affects a person's ability to respond socially or form relationships.

VOA: standard.2010.08.09

Some of the best mosaics in Egypt date to ancient Rome, but the art form was used in the jewelry set of the Pharoah Tutankhamun.

VOA: standard.2010.07.30