Why cant the ibbense produce children with regular humans, when the real life neaderthals interbreed with humans so much that almost all humans(except some remote tribes in saudi arabia) have neandertal ancestors? stevenattewell Uncategorized June 22, 2017 1 Minute Because I doubt George R.R Martin is up on modern genetic anthropology. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related Published by stevenattewell View all posts by stevenattewell Published June 22, 2017