Spider webs function like microfiber dust cloths to capture passing prey using the electronic charge generated by flapping wings, according to a study. The findings could explain how spiders evolved to produce the light, flexible webs that react with electrically charged passers-by. "Using a high-speed camera, you can clearly see the spider web is deforming and touching the insect before it reaches the web," said study researcher Victor Manuel Ortega-Jimenez.

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