Why do elephants have hair on their heads? Scientists solve head-scratcher
http://www.cnn.com/2012/10/18/us/elephant-hair/index.html?hpt=hp_c3
In what I would consider a rather non-intuitive conclusion, it seems that, based on modeling, the sparse hair of the elephant actually contributes to cooling. The article is also interesting in that it seems that elephants have to shed several kilowatts of energy each day to keep from overheating (humans are reputed to put out as much heat as a 100 watt (incandescent) bulb, for comparison). Too bad we don’t have any effective way to capture low-grade heat and convert it to electricity, if we did we could use elephants to power our houses.
Prolly better to just put the elephant in a giant hamster wheel.