The reduction of canines is explained by some authors by the fact that the use of tools has rendered them useless as a means of threat (Darwin 1871, Simons 1972, Poirier 1973, Washburn & Ciochon 1974), according to others with the need to allow displacements side of the mandible in the "circular" mastication suitable for hard foods, fruits and vegetables (Jolly 1970, Dunbar 1976, 1983).
The shape of the hand with the opposing thumb, other than that of anthropomorphic apes, indicates an adaptation to harvest seeds and fruits (Jolly 1970). The intestines had to be long enough, judging by reconstructions, as in animals that feed on plants. From Australopithecus, the family called Homo is born.
They are our closest ancestors. The body with the passing of the eons stretches and straightens, the hair becomes more and more seldom, the size of the head and brain in it increases gradually.
The ability to walk erects is perfected, now they can afford to go deeper into the savannahs, abandoning tree protection. It improves the ability to build and handle tools and weapons, the first crafts, agriculture and early assemblies are born. In the time that flows, he colonizes both hemispheres, he becomes stationary and builds houses, villages.
The past brings together the present, the modern man moves his footsteps on the ground, in fact the period ranging from the middle paleolithic of about 200,000 years ago to today sees the appearance and diversification of the Homo Sapiens species.
The precise dating of the first definable specimens Sapiens, traditionally placed about 130,000 years ago, has been moved by paleontological science back in time, around 195,000 years, from Ethiopian finds in volcanic tuffs of the Omo River valley.
Archaeologists do not all agree on how long men exist as we know them, those who clean and well-shaved, perhaps dressed in a beautiful gown, we can meet without astonishing us in everyday life...