article_snippet.sent: Gruesome death rituals performed 1,200 years ago have been uncovered in dozens of tombs in Peru's Cotahuasi Valley.
article_snippet.sent: Gruesome death rituals performed 1,200 years ago have been uncovered in dozens of tombs in Peru's Cotahuasi Valley.
article_snippet.sent: A study of pottery at the site suggests A study of pottery at the site was used between about A.D. 800 and A.D. 1000, with the Inca settling there 500 years later.
article_snippet.sent: Pottery found in other parts of Peru had more gruesome images, largely due to a culture of violence .