LOL, I can occasionally “smell” snow on those miserable, gray days...
On a more realistic note, why would this be considered to be unusual, that human hands are an infrared radiation source. Anyone who has held a living hand knows that.
Now, a “powerless” source...that would be something different altogether. Humans as IR emitters are “powered”. Take away our food (power source) for a few weeks and see what our IR emissions look like.
I got tired of visible light photography and got into IR and UV.
I can look at a scene and tell if it will make a worthy IR photo or not.
Normally that would be lots of foliage and such but there are other things that emit/reflect IR quite well and I have a weird knack for ‘seeing’ them beforehand.
UV photography is even stranger.
Full spectrum is really bizarre.
Very little of the world looks like we think it does.
If we could see what critters do, we’d go insane.
/there is something wrong with me, I think
o_O