If you have ever stood next to another human being, then you probably felt some body heat radiating from her. What you might not realize is that everything emits radiation: you, your dog, your chair. Everything! (see this article: http://discovermagazine.com/2007/jun/life-is-rad).
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| Explainers play in the infrared camera with ice and hot water. Photo courtesy of Sylvia Algire* |
