Mass Effect - The Quarians @ Official Site

BioWare has released some information on the Quarian race at the Mass Effect site:

A nomadic race of humanoid aliens, the quarians are generally shorter and of slighter build than humans. They dress in a scavanged assortment of materials, hiding their faces behind visors, goggles, or breathing masks. Some believe the quarians are cybernetic, a blend of machine and biology that can survive for a time in the cold vacuum of space. Others believe the quarians are simply so used to living on their substandard, makeshift ships that they never remove their survival suits.