Geneticists describe the neanderthal as a separate species from us and as an evolutionary dead end. DNA test showed them to be enough different from us that crossbreeding would not have even been possible. I would guess that our ancestors got tired of looking at them and killed them all.
"Geneticists describe the neanderthal as a separate species from us and as an evolutionary dead end. DNA test showed them to be enough different from us that crossbreeding would not have even been possible. I would guess that our ancestors got tired of looking at them and killed them all."
Than explain genetic cross-breeding in other mammal species.... Dogs for example have been cross-breed to produce better strains and for different purposes (e.g. pit bulls are breed for hunting and protection. Horses are cross-breed to make faster and stronger breeds.) So what makes it impossible for a neanderthal and a homo sapien (the basic equal to a labrador and a poodle) to cross-breed if it is benificial to both species, possibly making one smarter and the other stronger. It's called nature and nature adapts to suit the variables it is impossed with.
In other words there is no such thing as an impossability in nature.