Paranthropus Aethiopicus was a bipedal hominid that lived between 2.8 and 2.2 million years ago. Fossils representing the beginning of this genus include some fragmentary fossils from Ethiopia and a skull found at the Lake Turkana site in Kenya known as the "Black Skull". This skull has a volume of about 410ml, the smallest adult brain ever discovered in an established hominid. The skull also has the most defined sagittal crest of any hominid, the most prognathous face and extremely large molars (although no teeth were found with the skull).