Cracking Open a Safe | I Didn't Know That

Jonny Phillips enlists the help of a professional locksmith to find out if it is possible to crack a safe using just a doctor's stethoscope—just like in all those caper movies!
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About I Didn't Know That:
Two industrial scientists, Richard Ambrose and Jonny Phillips, explain the science behind everyday life... from microwave ovens to beating a lie detector.

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Cracking Open a Safe | I Didn't Know That
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