Fossils unearthed in southern Germany of a remarkable ape that lived about 11.6 million years ago may alter the understanding of the evolutionary origins of a human trait - walking upright on two legs. Scientists said the ape, called Danuvius guggenmosi, combined attributes of humans - straight lower limbs adapted for bipedalism - with those of apes - long arms able to stretch out to grasp tree branches. That indicates Danuvius was able to walk upright on two legs and also use all four limbs while clambering through trees.