The following sheds some new light on the origins of the first humans.
Thought it might be of interest.

Please Note: This abstract is 1) neither intended to insult, nor have any
reference whatsoever, to anyone from Germany, 2) has no connection with
Chylamidia

Love Liza

--
[log in to unmask] (Liza May)

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X chromosome evidence for ancient human histories

Diverse African and non-African samples of the X-linked PDHA1 (pyruvate
dehydrogenase E1  subunit) locus revealed a fixed DNA sequence difference
between the two sample groups. The age of onset of population subdivision
appears to be about 200 thousand years ago. This predates the earliest
modern human fossils, suggesting the transformation to modern humans
occurred in a subdivided population. The base of the PDHA1 gene tree is
relatively ancient, with an estimated age of 1.86 million years, a late
Pliocene
time associated with early species of Homo. PDHA1 revealed very low
variation
among non-Africans, but in other respects the data are consistent with
reports
from other X-linked and autosomal haplotype data sets. Like these other
genes,
but in conflict with microsatellite and mitochondrial data, PDHA1 does not
show evidence of human population expansion.

Eugene E. Harris and Jody Hey; Department of Genetics, Rutgers University,
Nelson Biological Labs, 604 Allison Road, Piscataway, NJ 08854-8082
(Address until August 1, 1999: Institute of Cell, Animal and Population
Biology, University of Edinburgh, Ashworth Laboratories, King's Buildings,
Edinburgh EH9 3JT, Scotland.)