homo-ergaster-copy

Australopithecus afarensis: The first step from Ape to Men
Brain size: 380 - 430 cc
Presence on earth: 3.7 to 2.9 million years ago
Australopithecus afarensis still looked pretty much ape-like, but presented already human features in its anatomy. Although still living partly on trees, he was the first in the Homo lineage that walked upright.