Biological classification can get hairy. You probably know of the two main types of elephant (Asian and African), but there are actually many species and sub-species within those classifications. It's the same way with dogs: The Canis genus includes every single dog-like species from the wolf to the fox to the jackal to your beloved Fido. It seems like every organism is part of a great big clubhouse of different species, so why is there only one species of human? Well, in fact, there used to be a lot more than just Homo sapiens — and there's an incredible prehistoric hybrid that's proof.
Modern Stone Age Family
Can There Be Only One?
Written by Reuben Westmaas September 6, 2018
Wake up with the smartest email in your inbox.
Our Best Articles Daily