In August 2008, 9-year-old Matthew Berger, the son of Lee Rogers Berger, found a clavicle and a jawbone embedded in a rock near Malapa Cave in South Africa. Subsequent excavation, headed by Berger, led to the discovery of numerous bones nearby that dated back nearly two million years. Along with various co-authors, Berger published a series of articles between 2010 and 2013 in the journal "Science" that describe what they call a new species, "Australopithecus sediba", which had a mixture of primitive and modern characteristics. The finding was particularly promising because it potentially revealed a previously unknown transitional species between the more ape-like australopithecines and the more human-like "Homo habilis". Berger claimed that this new finding represented "the most probable ancestor" of modern-day "Homo sapiens".