Spiders can hear you walking and talking from across the room

New Scientist 

When you arrive home and open the front door or enter your bedroom, the spiders can hear you. It has long been known that spiders can hear sounds via leg hairs that bend in response to vibrations arriving through the air or through solid objects such as floors or walls. But until now, we thought they could only hear airborne vibrations a few centimetres or "spider lengths" away at most. It now seems that this same approach actually lets them hear sounds up to 5 metres away. Gil Menda at Cornell University in Ithaca, New York, and his colleagues were studying a type of jumping spider, Phidippus audax, that they assumed relied almost completely on sight and vibrations they can feel through other objects, such as leaves or floorboards.

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