TIL about anti ninja floors in Japan. They were purposefully made to squeak as to alert people of intruders. science.howstuffworks.com Submitted by tpb01 t3_yf8hvz on October 28, 2022 at 12:32 AM in todayilearned 187 comments 5,566
Passionate_Wobat t1_iu2exyl wrote on October 28, 2022 at 1:24 AM It's a little known fact that wd40 was invented because of this. Permalink 3
Viewing a single comment thread. View all comments