I know very little about it but I can't see why Man couldn't have developed simultaneously in various places. Why would we all originate from the same small part of the planet & gradually spread to other parts? It doesn't seem logical to me. Of course, my ideas might conflict with the religious concept of evolution. I don't know how much influence this still has on scientific theory but it has proved difficult throughout history to relate the two. Depending on the approach taken in interpreting archeological discoveries (probably the wrong description but I'm no scientist) we could all be completely wrong & I suspect that we shall never know the truth.

We really don't want to get specific about religious concepts of evolution other than that many such groups have no such concept

. As to its influence on scientific theory, as usual, that depends upon the individuals involved; properly, it would have none but at one time long ago 'the two' were virtually the same.
DNA and biological tracing are somewhat seperate from, although applicable to, archeology. It has also been found that, the further one gets away from the equator, there is less need for resistance to ultraviolet light throughout the year. This indicates that less melanin would be produced (which causes skin pigmentation); about every 25,000 years there would be a noticeable change in skin color.
I would disagree that like species (equivelent DNA) would logically occur in seperate places although I wouldn't declare it impossible because I've had things happen that I'd thought were impossible. We'll just say it seems extremely improbable.
In the line of archeology, I see no reason why the same technological things can't originate in seperate places; this is in the area of thought and necessity -- I wouldn't even restrict it to a species. After all, some humans aren't so smart and some animals are smarter (than other animals... well, then again...

).
