Don’t forget the Denosivans. And the other archaic humans that interbreed with our species. Also labs all over the world confirmed the interbreeding results. Unlikely to be contamination as Ancestry.com measures % neanderthal in 2 million+ DNA kits sequenced. Did you have your DNA sequenced? You may have some Denosivan DNA in your genome. I had zero Denosivan but 1.5% Neanderthal.