TIL that visitors to the Grand Canyon National Parks Museum were exposed to unsafe levels of radiation for nearly two decades due to uranium ore being improperly stored in 5-gallon paint buckets next to a taxidermy exhibit

https://www.azcentral.com/story/news/local/arizona/2019/02/18/grand-canyon-tourists-exposed-radiation-safety-manager-says/2876435002/

https://www.reddit.com/r/todayilearned/comments/15r0ff5/til_that_visitors_to_the_grand_canyon_national/