This is known to be the very fist human to exist. The skull was actually discovered by an unknown South African but further investigations were made by Raymond Dart. The fossil was recorded to be 3.7 million years ago. The brains of most species of Australopithecus were roughly 35% of the size of that of a modern human brain. Most species of Australopithecus were diminutive and gracile, usually standing no more than 1.2 and 1.4 m (approx. 4 to 4.5 feet) tall. Actually, the skull found by the South African native was thought be the skull of an ape, but after seeing that the spinal column was connected below the skull and not at the back, it was later concluded that it should be a skull of a man and not of an ape.