Selam, a 3.3-million-year-old human ancestor (Australopithecus afarensis specimen) from Ethiopia. She is known as "The World's Oldest Child", because she is the oldest known fossil of a child. The skeleton comprises almost the entire skull and torso and many parts of the limbs. The features of the skeleton suggest adaptation to walking upright as well as tree-climbing.
Australopithecus afarensis ‘Lucy’ spent significant time in trees, new study reveals. According to a new study published in the journal PLoS ONE, the relative strength of arms and legs of ‘Lucy’ — a 3.18-million-year-old specimen of Australopithecus afarensis — was in between that of modern chimpanzees and modern humans.