TIL "Bezoar stones", undigested matter in porcupines, proboscis monkeys, and other animal's intestines, were once prized in Europe and Asia as magical cure-all stones and worn by royalty on rings.

https://science.howstuffworks.com/life/biology-fields/magical-medicine-of-bezoars.htm
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gpf8ir/til_bezoar_stones_undigested_matter_in_porcupines/