In this archaeological study, scientists are most concerned about how these children died for sacrifice. Wilson and his colleagues believe that it will take about four months for these children to be sent to the top of llullaillaco until they die. They found mixed corn wine and coca leaf fragments in the hair of the children's mummies, which may be the food that children eat when they are sent to the peak. Timothy Taylor, an archaeologist in university of bradford, said, "I think it will take a year for children to be sent to the temple on the top of the mountain, during which local residents will hold various worship activities. At the same time, in order to ensure that children can give birth naturally, children are generally given certain drugs. " She also stressed that in such sacrificial activities, the death of children used for sacrifice is very cruel. This period was 500 years ago, and the Incas ruled several small tribes in the Andes.

It is reported that the 7-year-old boy named "Youye Yake Boy" may have suffered cruel torture before his death. His clothes are covered with vomit and diarrhea. Archaeologists found that he took a drug called "annatto" before his death. Ecstasy. However, the real cause of his death is not these drugs. His body was tied with a piece of cloth, resulting in broken ribs and dislocated pelvis, which proved that he died of suffocation. At present, this research report has been published in the journal Proceedings of the National Academy of Sciences.