2 million years ago some Australopithecines they were adapting to a nut and seed diet developing huge teeth and powerful jaw muscles, they became a separate species known as Paranthropus , Colloquially known as “ Nutcracker “.
While other australopithecines they were evolving in a very different direction, becoming taller (i.e. Australopithecus sediba ), and then developing smaller teeth but a bigger brain so that they were able to create stone tools.
These became known as the Homo genus .
The first species of Homo was Homo Habilis (“Handy Man”).
For nearly 1 million years hominid species with large brains ( Homo ) and hominid species with large jaws ( Paranthropus ) lived side by side in East Africa .
But the size of the brain of the Homo species continued to grow through the process of natural selection:the most intelligent hominids with the best toolmaking skills were better able to survive and pass on their genes.
Eventually, the large species of Homo with brains simply competed with the large jawed Paranthropes species, which went extinct about 1 million years ago.
The most successful species of the genus Homo in this period it was Homo Erectus .
This species, from 1.4 million years ago , had developed a brain size of 1,000 cubic centimeters (about 70% of the size of modern man).
Not only did Homo erectus come to dominate Africa after all other hominid species became extinct, but it was also the first hominid species to emigrate from Africa and to settle in Asia and Europe.
The Gauls implore Caesars help against Ariovistus The Helvetian war being over, deputies from almost all of Gaul and the principal inhabitants of the cities came to congratulate Caesar; they well knew, they said, that his war against the Helvetii was the vengeance of the injuries done to the Roman