We don't know why, but that would suggest we didn't conquer them, maybe our males didn't find their females attractive enough to have sex with. Neanderthals are more masculine looking than us, so their males would be attractive, but their females maybe looked too much like males to us.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC368159/
We don't know why, but that would suggest we didn't conquer them, maybe our males didn't find their females attractive enough to have sex with. Neanderthals are more masculine looking than us, so their males would be attractive, but their females maybe looked too much like males to us.