Archaeologists in Luzon Island have turned up the bones of a distantly related species, Homo luzonensis, further expanding the human family tree.
You might enjoy "A Brief History of Everyone Who Ever Lived: The Stories in Our Genes" by Adam Rutherford. He talks about different species of people that have been discovered and how they are linked to current inhabitants of earth. We all have some Neanderthal in our DNA.
See what nature gave us? Homo Sapiens! Destroyers of Planet Earth. We do have one sub species....RepubliTHUGS.