22 enero 2015
New research suggests pre-Homo human ancestral species, such as Australopithecus africanus, used human-like hand postures much earlier than was previously thought. The distinctly human ability for forceful precision (e.g. when turning a key) and power «squeeze» gripping (e.g. when using a hammer) is linked to two key evolutionary transitions in hand use: a reduction in arboreal climbing and the manufacture and use of stone tools. However, it is unclear when these locomotory and manipulative transitions occurred.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/1Yq4MZ4LGQ0/150122145432.htm
