The manufacture of stone tools and their use to access animal tissues
by Pliocene hominins marks the origin of a key adaptation in human
evolutionary history. Here we report an in situ archaeological
assemblage from the Koobi Fora Formation in northern Kenya that
provides a unique combination of faunal remains, some with direct
evidence of butchery, and Oldowan artifacts, which are well dated to
1.95 Ma. This site provides the oldest in situ evidence that
hominins, predating Homo erectus, enjoyed access to carcasses of
terrestrial and aquatic animals that they butchered in a well-watered
habitat. It also provides the earliest definitive evidence of the
incorporation into the hominin diet of various aquatic animals
including turtles, crocodiles, and fish, which are rich sources of
specific nutrients needed in human brain growth. The evidence here
shows that these critical brain-growth compounds were part of the
diets of hominins before the appearance of Homo ergaster/erectus and
could have played an important role in the evolution of larger brains
in the early history of our lineage.
http://pos-darwinista.blogspot.com/2010/06/dieta-de-proto-humanos-incluia-animais.html