Cool science of cooling

How do air-conditioners and refrigerators work? Scientific explanations for this can be cranky or patient. You choose.

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Can we get any more self-indulgent? These desert dwellers have decided that the best way to survive the summer heat is to install gigantic misters and air-conditioners in their backyard.
From the March 31 issue of The Lancet:
I think one of the most important tests of behavioral economics will arrive in the next few years, as we attempt to persuade consumers to improve energy efficiency in the home.
Robert Krulwich has a fascinating piece on NPR about the binding problem and the speed of nerve transmission.