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
Thousendmiles t1_iuet93n wrote on October 30, 2022 at 7:59 PM So, the squeaks of my back and knees are alerting me about intruders...aging can be surprising! Permalink 1
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