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think you might have pests in your attic? cut away a small square of the ceiling below, and wait until it's dark. if you can see a red light flickering through the gap in the floorboards, then it's almost certainly mice. the light comes from the optical sensor which is on the underside of the mouse

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@jk evolutionary pressures have led some mice to develop an infrared sensor unfortunately

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@charlotte good job i have a sony handicam with NightShot(tm)

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