There are lots of interesting and fun machines in the world, but there are some machines that changed the world. This series explores how certain pieces of technology have made huge impacts upon the world. Be it life-saving technology, such as the defibrillator, or a catalyst for social change, such as the washing machine, some machines are world changers.
This is Book 2 in the How Machines Changed the World Series. See all How Machines Changed the World books here.
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