美国科学60秒 SSS 2012-11-27

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Researchers found that the small, spotted¹ bumps that cover the skin of crocodiles and alligators² are chock full of nerve endings that are exquisitely³ sensitive to pressure and vibration⁴. Even more sensitive than human fingertips.

 

These touch-sensors are especially good at detecting the vibrations⁵ caused by tiny water ripples—something that may help the animals locate swimming prey⁶. And the most sensitive areas were found near the face and teeth—likely helping⁷ the animals to identify and manipulate objects with their mouths: crucial for crocodile females who must delicately carry and protect hatchlings in their powerful jaws⁸. 

 

Researchers say they’ve known about the spotted bumps for years, but because of crocodile skin’s tough, armorlike appearance, they simply assumed their function was something other than feeling. The lesson? Never judge a croc…by its cover.

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