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To be more precise, it makes them less homo sapien, as according to scientific definition.

What you're saying just shows a lack of understanding about the various hominids. The differences Neanderthals possess are a difference in species, not in race. And it's a far cry more than simply a protruding brow. All races of homo sapien possess certain traits, every single one whether of Asian of Eurpean decent, whereas the differences with Neanderthals are traits which no homo sapien possesses. When you learn about how a species is defined and what, for example, is the difference between a mouse and a rat or a cheetah and a tiger (read: a different species) it becomes clear that Neanderthals, and all other hominids, are far from being merely different "races" of humans. They were a different stock of human entirely: they were a different species (known scientifcally as Homo neanderthalensis).

We are all, of course, quite welcome to go on believing whatever we wish, but only someone dedicated to truth and maintaining integrity will take the time and effort requried to understand what the definition of a term means (i.e., species). If you believe Neanderthals to be merely a different race and not a different species, you may need to apply your own definition to race and species, as they are not the universal definitions of the word.

As an addendum, there really is no difference in saying Neanderthals are a different race of homo sapien than there is in saying vultures are a different "race" of parrot. When we understand the definitions, we then can understand that vultures are not a form of parrot and why.
Scientific definition? The term species has not yet been well-defined, and it's getting worse.

Cryptic Species Ref 1
Cryptic Species Ref 2
Cryptic Species Ref 3

While they try for all they're worth to make the "cryptic species" schemes work, they're clearly going to cause nothing but confusion. Basically, 2 groups are to be considered different species if they don't interbreed, even if they have the capacity to do so.

By this reasoning, one could chop up humans into thousands of species right now. Any "reproductively isolated" group qualifies. Either they haven't thought of this, or they're hoping nobody will understand.

And for what it's worth, I met a man once who had a brow ridge. He looked normal, and I didn't even notice until he pointed it out to me. The know-it-alls don't seem to have taken a complete enough survey of present-day humans. I've seen all I need to see with my own eyes (and I did give thanks for the privilege).

Dark Matter + Dark Energy = Dark Truth

"We find that such evidence demonstrates that the ID argument is dependent upon setting a scientifically unreasonable burden of proof for the theory of evolution." - Judge Jones Kitzmiller case
http://www.talkreason.org/articles/Falsify.cfm

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