Answers

2014-09-20T10:23:38+08:00
They don't have external ears, but they do have an eardrum. They pick up the vibrations from the ground.
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2014-09-20T16:34:52+08:00
They have inner ears. When humans walk, the vibrations from the ground connects to the body of the snake which connects to its bones and up to the inner ear. The snake reacts based on the thought of being threatened. So, when attacked by a snake, you might as well stay still.
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