The video below begins with this simple but
profound question,


Take single modern human and place a parent
behind him . . and then a parent behind that . .
and so on . . generation after generation stretch-
ing into the past . . forming a line of spectacular
proportions.


Who or what would be standing way back at the
beginning of this stupendously long line?


For a provocative answer to this hotly debated
question, take a look at the video below