The history of keeping cool

Published On: Jul 18 2012 09:24:26 AM PDT   Updated On: Jul 16 2013 06:59:54 AM PDT

With temps on the rise nationwide, look back at the ways humans have tried to stay cool through the centuries.

Cooling - Sod Home
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Nineteenth century American settlers often built sod homes, which often weren’t permanent but did keep cool in the summer, according to


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