TIL that knocking on wood was a thing because people believed that spirits lived in trees and knocking would prevent them from bad luck. (scroll a bit for the right part.)

https://www.ksat.com/features/2020/10/27/knock-on-wood-7-common-superstitions-and-the-quirky-explanations
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gjhxxh/til_that_knocking_on_wood_was_a_thing_because/