text: Fossil Pushes Upright Walking Back 2 Million Years, Study Says  quot;Dating the beginnings of bipedalism is very important in the human story because, for many experts, it would mark a clear divergence from the ancestral/ape pattern and show that the human lineage had really begun, quot; said Chris Stringer, director of the 
inputs: Fossil Pushes Upright Walking Back 2 Million Years, Study Says  quot;Dating the beginnings of bipedalism is very important in the human story because, for many experts, it would mark a clear divergence from the ancestral/ape pattern and show that the human lineage had really begun, quot; said Chris Stringer, director of the 