An archaeologist at BU whom I’d met on a couple of occasions was a specialist in analyzing old feces and liked to comment, “It may be shit to you but it’s my bread and butter.”
"The new, conclusive evidence comes from preserved pieces of human excrement that were found at the site. The pieces contain human proteins that could be there only if the subjects had eaten human flesh. Researchers believe that if cannibalism has been definitively proven at this one Southwestern site, it is overwhelmingly likely that cannibalism was common enough to have taken place at the other sites where butchered bones have been found."