If the corpse is no longer generating heat, heat radiation would cease very quickly.
Replaced by a drop in temperature.
"Fog" is just a hypothetical, IMHO more likely than a spirit photo.
BTW, how much does a soul weigh, according to those researchers you mentioned?
That test was performed in the 19th century. Anything more recent?
Double negative.
I plead 430am, first cup of coffee syndrome. Sorry if I confused you. Thanks for the grammar check.