During risky expeditions in an underwater cave in Mexico, scientists unearth the skeleton of a 13,000-year-old prehistoric teenager to gain insight into the earliest known humans in America.

Rarely do the ravages of time allow us to gaze directly upon the faces of our remote predecessors ... and sculptors. In the NOVA film "Mystery of the First Americans," for example, sculptor ...

Practitioners of this school, who tend to have an extensive background in osteology and anatomy, begin by closely studying the bones of the face ... who recovered and first studied Kennewick ...