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You hear them before you see them. On a quiet day, as you approach one of the dens at the Narcisse Wildlife Area in Manitoba, Canada, you can hear a rustling like wind in dry leaves. It's the sound of thousands of slithering snakes. Each spring these prairies are witness to one of the most extraordinary events of the natural world. After spending the winter in a state of suspended animation in subterranean caverns, tens of thousands of redsided garter snakes emerge and gather--the world's largest concentration of snakes. This phenomenon is the subject of study for Dr. Robert Mason, the current recipient of the National Science Foundation's Young Investigator Award.
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