7

The Seesaw and the Shoes

This short shows how two objects led to important discoveries. Children playing with a seesaw inspire French physician Rene Laennec to invent the stethoscope, and a pair of shoes made of caoutchouc lead Charles Goodyear to discover the process for vulcanizing rubber.
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Ülke: United States of America

Çalışma süresi: 11 dakika

Kalite: HD

Serbest bırakmak: 1945

imdb rating 7

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