Photo by @daisygilardini | Have you ever wondered why elephants have hair? You can see from this picture they have hair even on their trunk… long hair!
According to a paper from Princeton Environmental Institute professor Elie Bou-Zeid and researchers Conor Myhrovold and Howard Stone published in the peer-reviewed journal PLoS One, an elephant's sparse hair helps the animal dissipate heat more efficiently.
Thermoregulation, the process that allows one's body to maintain its core internal temperature, is key for elephants, because of the elephant's body volume to skin surface ratio.
Hair works by creating more area for heat to be released. The Princeton study showed that when the wind is low, when elephants tend to overheat, the hair acts like pin-shaped cooling fins, increasing convection cooling efficiency by 24 percent.
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