If you're without a compass and lost in the wilderness, you can create what MAKE Magazine calls a "cup positioning system" to help you find your bearing. All it takes is a paper or styrofoam cup, a ...
Can't see the video? Download an mp4 [22 MB] version of this video. Fill a glass with water and grab a few steel paperclips. It won't surprise anyone to 'discover' that paperclips don't float in water ...
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