 It is around two million years older than the lower jaw of Mauer and, despite its advanced age, still does not represent the common base of humans and apes.Otto Schoetensack had the site at the bottom of the sand mine marked with a commemorative stone on which a horizontal line represented the level of the find.Whether his wish had been granted—namely that the stone may remain in its place, even if the sand mine will one day be re-filled—is unknown.