The history of keeping cool

POSTED: 09:24 AM PDT Jul 18, 2012    UPDATED: 05:02 AM PDT Jul 22, 2014 

This week marks the 112th anniversary of air conditioning, and aren't we all thankful! Look back at the ways humans have tried to stay cool through the centuries.

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This week marks the 112th anniversary of modern air conditioning, and aren't we all thankful! Look back at the history of fans, air conditioners and other ways humans have tried to stay cool through the centuries.

 
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