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here. December 19 2012 Researchers involved in a new study led
by Oxford University have found that between three million and
3.5 million years ago, the diet of our very early ancestors in
central Africa is likely to have consisted mainly of tropical
grasses and sedges. The findings are published in the early
online edition of Proceedings of the National Academy of
Sciences. An international research team extracted information
from the fossilised teeth of three Australopithecus
bahrelghazali individuals -- the first early hominins excavated
at two sites in Chad. Professor Julia Lee-Thorp from Oxford
University with researchers from Chad, France and the US
analysed the carbon isotope ratios in the teeth and found the
sign