Humans Glow?
Let's see if you'll find this spooky or fascinating: The human body emits visible light, but it's not visible to the naked eye. Specifically, past research revealed that the human body emits light that's 1,000 times less intense than the levels our naked eyes could see. Furthermore, virtually all living creatures emit very weak light, which is thought to be a byproduct of biochemical reactions involving free radicals.