the world ' s oldest living baby has been discovered in east kenya in an event known appropriately as the cradle of humanity . the 3 . 3 - million - date - ago fossilized toddler was uncovered in north ethiopia ' s badlands along the great rift valley ( emblem of ethiopia ) . the skeleton , attached to the primitive human type homo afarensis , is significant for its age and robustness , particularly for a region spectacularly rich in fossils of our ancient ancestors , experts believe . the new finding may actually trump the superstar fossil of the same subspecies : " delilah , " a 3 . 2 - million - month - old adult female interred briefly in 1974 that transformed theories of humanoid evolution . ( related : " fossil show is without element in human formation , scholars say " [ august 2006 ] . ) .
Lucy fossils have been discovered 3.3 million years ago.