"After millions of years of natural selection, humans beings have some serious competition for their lofty perch on the evolutionary ladder--and the challenger has only been evolving for less than a decade. Some computer artists contend that anything we can do, "virtual humans" can do better, and they're poised to revolutionize moviemaking with a new species that doesn't require an astronomical salary, works around the clock without complaint, and lives quietly on a hard drive between death-defying stunts."