What I find amazing is that the literature on the various stages of when we started walking upright and all the transitional appearances of pre-human until what we look now was so well preserved in the fossil evidence that backs this story up as being factual. All the other primate lineages are limited to a few skull fragments with the exception of gorilla's fossils that were never found.
How did the fossils of our ancestry were so well preserved while all others only produced fossil fragments providing little evidence? The few fossils of skulls look like modern primates but they were bigger in the past.
I see many changes occurred for our line but our primate cousins hardly changed at all. Can anyone explain this?
Retroviruses on primate lineage showed no connection and they are unique to each primate group. Location of retroviruses may be the same but the retrovirus associated with it is not the same in each primate.