Thousand-year-old DNA from Chichén Itzá offers eye-opening details of the religious rituals of ancient Maya. Thousand-year-old DNA from Chichén Itzá offers eye-opening details of the religious rituals of ancient Maya. Mayans, Genetics and Heredity, Archaeology and Anthropology, Bones, DNA (Deoxyribonucleic Acid), Salmonella (Bacteria), Indigenous People, Max Planck Institute for Evolutionary Anthropology, Barquera, Rodrigo, Chichen Itza (Mexico), Mesoamerica, Mexico, your-feed-science NYT > Science