Just to expound a little further on Gillette's post on ERV's:I don't think school children should be taught that something is fact when there is no evidence to prove it.
"Given the size of vertebrate genomes (>1 × 109 bp) and the random nature of retroviral integration (22, 23), multiple integrations (and subsequent fixation) of ERV loci at precisely the same location are highly unlikely (24). Therefore, an ERV locus shared by two or more species is descended from a single integration event and is proof that the species share a common ancestor into whose germ line the original integration took place (14)."
Apparently given a computer at his fingertips 'guest' has been unable to find a single piece of evidence. While the rest of us can find plenty. Perhaps the problem is his computer skills?
Guest, why is it you have now again been provided with exactly what you required but are ignoring this now also without directly addressing the evidence? Is this evidence that I'm a prophet?