Stuff of Genius: René Laennec: Stethoscope
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HowStuffWorks_Science
3 years agoStuff of Genius: Alfred Nobel: Dynamite
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HowStuffWorks_Science
3 years agoStuff of Genius: Standard Time
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HowStuffWorks_Science
3 years agoStuff of Genius: Neon Lights
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HowStuffWorks_Science
3 years agoStuff of Genius: L.L. Zamenhof: Esperanto
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HowStuffWorks_Science
3 years agoStuff of Genius: Windshield Wipers
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HowStuffWorks_Science
3 years agoStuff of Genius: Liquid Paper
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1:38
HowStuffWorks_Science
3 years agoStuff of Genius: Spray Cans
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HowStuffWorks_Science
3 years agoStuff of Genius: Aspirin
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1:10
HowStuffWorks_Science
3 years agoStuff of Genius: Velcro
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1:38
HowStuffWorks_Science
3 years agoStuff of Genius: Whitcomb Judson: Zipper
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