Yohannes , who is also the curator of physical anthropology at the Cleveland Museum of Natural History and who discovered the fossil hand of Ardi , wrote : `` The Woranso-Mille study area has thus far yielded more than 120 early hominin fossil specimens dated to between 3.4 and 3.8 million years ago . ''
Yohannes Haile-Selassie , the curator of physical anthropology at the Cleveland Museum of Natural History has said that `` The Woranso-Mille study area has thus far yielded more than 120 early hominin fossil specimens dated to between 3.4 and 3.8 million years ago '' .