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Ears of the Elephant

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#732
Fun:*** (2.75)
Difficulty:** (1.33)
Category:Science
Submitted By:rkb-1961*
Corrected By:shenqiang

 

 

 



Elephants have almost no predators and they feed on plants, so they don't need to hear all that well (neither to protect themselves or to find food). But why do they have such big ears?



Answer

They're for regulating the body temperature. Since elephants have a large body mass compared to their skin surface they need the extra skin surface provided by the ears to regulate their internal heat (elephants are warm blooded animals). The ears are in fact radiators.
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