"Chemists Determined The Yellowish Material Was a Type of Kefir Cheese."
World’s Oldest Cheese Found in Tombs of 4,000-Year-Old Mummies
https://www.nbcnews.com/science/science-news/3-600-year-old-cheese-found-chinese-mummy-n40631
https://www.nbcnews.com/science/science-news/3-600-year-old-cheese-found-chinese-mummy-n40631
https://www.nature.com/articles/507010a
https://www.livescience.com/43782-mummies-have-oldest-cheese.html
