Handsome By Chance: Why Humans Look Different From Neanderthals

http://www.sciencedaily.com/releases/2007/08/070813101018.htm

Summary: The article is talking about how neanderthals and humans skulls are very different. However they don't believe it is natural selection. They believe that random changes occured because of the isolation between the two.

Questions: How is natural selection or evolution illustrated in this article? The article is comparing neanderthals skull with a human skull.
How does this support Darwin original findings? Yes
List three things you learned from this article in your own words. That the differences occured because of isolation, also that these two species have been isolated for a while, and that our late relatives have nothing in common with us.
What impact would the absence of this organism have on the ecosystem? it would basically create a new ecosystem because a whole species would be gone.