6-Million-Year-Old Ape's Ear Suggests We Learned to Walk Upright in 3 Steps - ScienceAlert
sciencealert.comSubmitted by sciencealert6623 in science
From a four-limbed scramble to a two-legged amble – the knack for strutting our stuff on our hind limbs is one of the more obvious features distinguishing us humans and our ilk from great apes and earlier ancestors.