Of course, this is terribly oversimplified but just the same, these dicoveries in combination with the continuing debate over the location and travels of the Indo-European peoples, suggest that the supposed great emptyness of the of interior Asia is critically important. Very little study has been done in this unstable region but we aren't going to know critical information until we can fit it in.
There are numerous (Chinese) poems lamenting the green eyes of the Han emperors...and, other sources mention that the Han emperors' 'magic men' had red hair.