The first time that I experimented with thermographic imagery was for a cover story in 2008 for National Geographic Magazine on energy efficiency and conservation (link here).
The thermographic camera registers relative surface temperatures as a spectrum of color, from the coldest being blue through red and ultimately the hottest looking white. It seemed perfect to show the presence of heat as a description of energy usage.
I used the camera again for a shoot for National Geographic on the differences in temperatures for the hands of women and men- thumbnail on left. The Youtube video of the shoot can be seen here.
After the shoot was done, I was able to explore the Washington D.C. area with the thermal camera and was surprised at how it registered other things, especially planes landing at National Airport in Alrington, VA. The thermal airplane pictures were featured in a Nat Geo Proof story (link here).