Nina Joblonski mentioned one early hominid, Homo neanderthalensis, but there are quite a few other hominid species that are essential to understanding our ancestors. Pick 3 species from this Human Family Tree and, for each, identify 3 hallmarks of their species as we know it. This might be their physical features, their location, their estimated period of existence, or anything else! You are welcome to use outside credible sources, just make sure you link them in your response.