Who's yer monkey?

Now, here's something of interest... It seems they (scientists in this case) have discovered evidence of a different species of human living alongside (meaning in the same general habitat and time frame) our ancestors some 2 million or so years ago.
Link

They say it is significant and that it is a break from the common idea that there was a direct line between primitive ape and human.

I am not surprised by this finding. Ever since I learned of Neanderthal and Cro-Magnon humans co-existing, I rejected the linear version of human evolution. It turns out these two are not truly separate species, however, unless they have determined that inter-species breeding can happen. I was once taught that it cannot. We have learned, through DNA analysis, that Neanderthal and Cro-Magnon did interbreed.

As I saw it (evolution) then (and now); species evolve independently, vie for resources, and either succeed or die out. Those that are best suited for the environment have a better chance than those not suited and are unwilling to re-locate. Of those that can adapt to their habitat (and humans are incredibly adaptable), the species that can successfully breed (expand numbers faster than the death rate) are likely to be the "winners."

While reading the article, I would have been more surprised to learn the opposite (unity of species in the early evolution of humans) was true.