The Evolution of Man

[BorneanTiger]

Modern humans are of the species Homo sapiens, which is believed to have derived from Homo erectus anywhere from 300–800 thousand years ago. Homo erectus or Homo ergaster represent the second earliest known specimens of the human race, dating as far back as approximately 2 million years ago, with Homo habilis (which is considered to have lived 2.3–1.65 million years ago, and might be the same as Homo rudolfensis and Homo gautengensis) being the first. Though Homo habilis is not confirmed to have had obligate bipedalism (like australopithecines and unlike Homo erectus / ergaster), the cranium of KNM-ER 1813 (from Koobi Fora in Kenya, dated to approximately 1.9 million years ago, in the early years of Homo ergaster / erectus) is too similar to the cranium of a human being to be belong to an ape, in my opinion:

Cast of the skull KNM-ER 1813 at Göteborgs Naturhistoriska Museum, Göteborg, Västra Götaland County, Sweden, by Gunnar Creutz (10th of November 2019), versions 8563, 8564 and 8807:
   
   
   

Cast of the skull KNM-ER 1813 by The Smithsonian: https://humanorigins.si.edu/evidence/hum...mo-habilis, https://humanorigins.si.edu/evidence/hum...nm-er-1813
   

The skeleton of AL 288-1 or Lucy (Australopithecus afarensis), cast from Museum National d'Histoire Naturelle, Paris, by User 120 (27th of March 2007):
   

Whereas Homo sapiens is considered to have originated in Africa, fossils of Homo erectus / ergaster have been found in Eurasia and Africa, treating Homo erectus and Homo ergaster as belonging to the same species. Below is the skeleton of the "Turkana boy" of Kenya, who was of the species Homo erectus / ergaster, which shows that this race was bipedal like modern humans: https://evolution-outreach.biomedcentral...010-0247-8
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