[ValerieUSA]

The headline itself is confusing. It assumes there is more than one human species. I think there is only one human species. But I am not such an authority as "study."
Our Species Mated With Other Human Species, Study Says

[ApesForEvolution]

Man is not an animal species (I know, I know, it's 'debatable')...

[Fedora]

"The headline itself is confusing. It assumes there is more than one human species."

Yes, that's one of the problematic underlying issues I was getting at. Anthropologists of different schools will define "human" differently depending on their philosophical perspective. Some models of human nature recognize a qualitative difference between human intelligence and animal psychology, others view these as a continuum so that physiological similarities become the defining characteristic of "species". It's difficult to resolve the type of issue the article raises without addressing such underlying issues.