“According to a new DNA study, most humans have a little Neanderthal in them—at least 1 to 4 percent of a person’s genetic makeup.”
The latest contention is that homo sapiens and Neanderthals did mate, and there is apparently new DNA evidence which supports that contention.
I guess the scientists will debate this one until one side or the other has irrefutable evidence, or as irrefutable as is possible. I’d bet that DNA evidence will be the soundest evidence possible when dealing with the ancient bones of ancient beings.
Again, neanderthal DNA is described as halfway between ours and that of a chimpanzee. Trying to produce a crossbreed would be like the experiments soviet scientists did in the 30s trying to cross humans and apes; the subjects all died.