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A comment on Building a Cloud Chamber (Cosmic Ray Detector). Parent comment

Re:Building a Cloud Chamber (Cosmic Ray Detector) by ejr on Sunday July 27, 2014 @09:01PM (#8094579)
That's very cool. Brian Cox did a variation on his programme with an added hot water bottle on top : https://www.youtube.com/watch?v=fWxfliNAI3U
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