The most important screws EVER MADE!
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Perfect Timing (with the Marble Machine X)
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The HIDDEN Screws of PRECISION
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The Insane Math Of Knot Theory
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Robertson, Phillips, and the History of the Screwdriver
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The Science of Vacuum Implosions! - Mythbusters - Science Documentary
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This Should Be Impossible...
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Involuter? I barely know her!
19:15