In scientific terms, the glow comes from chemical reactions within our bodies. These chemical reactions besides generating energy and producing heat also produce free radicals – atoms or molecules that have a lone, isolated electron. That makes these radicals highly reactive setting off a series of energetic chemical reactions as they interact with various fats and proteins in our cells. The glow is produced when these reactions involve fluorophores – molecules that give off photons (elementary particles of light).
Humans are bioluminescent, too! But it’s too dim for anything to actually be able to see, so it’s no fun.
We also have stripes.
Is that “article” trying to say we’re exothermic and thus glow in the infrared?
Short answer: no
Long answer: