Board Thread:General Discussion/@comment-366087-20151027201544/@comment-24891101-20151027212556

Seven-Three: But we know they're interfertile with humans. If they were different species, that wouldn't be so. Admittedly, on these timescales, the biological species concept becomes a bit fuzzy. Look at Neanderthals, for instance.

Rozen: And of course certain internal differences. Like the ear canals going through Blake's skull.