Humans originated alongside rivers, evidence suggests

http://www.msnbc.msn.com/id/45738738/ns/technology_and_science-science/#.TvEFI2ND18E

  Just as great civilizations once emerged along the banks of major rivers such as the Tigris, Euphrates, Ganges and Nile, the ancestors of humans might have originated on riversides too, scientists find.
This discovery could help us better understand the environmental forces that shaped the origin of the human lineage, such as factors of the landscape that prompted our ancestors to start walking upright on two legs, researchers said.