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Look at Ma, no ears! Teen spiders hear from the organs on the legs



Goblin-faced spiders hang on their webs, and like gymnastics, they turn upside down to catch insects flying from the air. New research has found that to hear the sound of their prey coming, the spiders “listen” to the flapping of their tiny wings using a special organ in their spindly legs.

The organ looks like an array of parallel slits cut into the spider’s outer skeleton; located near the top of each foot, each mid gauge 0.0000003 and 0.000007 inch (10-200 nanometers) length. These tiny slits contain nerve cells that detect small changes in pressure caused by sound waves traveling through the air; The organ then sends this information to the brain.


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