Look back at the history of fans, air conditioners and other ways humans have tried to stay cool through the centuries.
Willis Carrier built the first modern air conditioner in 1902 to keep humidity down (and keep pages from wrinkling) in the New York printing plant where he worked, according to articles in Slate and The Atlantic. It accomplished its goal by sending air through coils cooled by water.
Auction Team Breker
Chuck Kennedy/The White House
Library of Congress
Boy Scouts of America
JASON REDMOND / Reuters
iStock / amete
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