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
jennc1979 t1_iu2j5e9 wrote on October 28, 2022 at 1:56 AM I knew there was a name for the staircase leading down from my bed room!!! Permalink 3
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