Experimental replication shows knives manufactured from frozen human feces do not work Eren, Metin I. ; Bebber, Michelle R. ; Norris, James D. ; Perrone, Alyssa ; Rutkoski, Ashley ; Wilson, Michael ; Raghanti, Mary Ann Abstract Publication: Journal of Archaeological Science Reports Pub Date: October 2019 DOI: 10.1016/j.jasrep.2019.102002 Bibcode: 2019JArSR..27j2002E