Food preservation began with the storage of edibles in bottles and led to such 19th-century inventions as air conditioning, refrigeration and the thermos bottle. Also discusses the first hand-held guns and traces the development of ...See moreFood preservation began with the storage of edibles in bottles and led to such 19th-century inventions as air conditioning, refrigeration and the thermos bottle. Also discusses the first hand-held guns and traces the development of rocketry in this century. Written by
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