The Scars of Evolution:"The most remarkable aspect of Todaro's discovery emerged when he examined Homo Sapiens for the 'baboon marker'. It was not there... Todaro drew one firm conclusion. 'The ancestors of man did not develop in a geographical area where they would have been in contact with the baboon. I would argue that the data we are presenting imply a non-African origin of man millions of years ago.'"
What Our Bodies Tell Us
About Human Origins
by Elaine Morgan
I think the theory that man originated in Africa is based solely on the fact that the oldest existing remains have been found in Africa.
The harsh climates in other parts of the world most likely destroyed whatever remains of ancient Man that may have existed.