Researchers studying plaquettes thought to be made by Magdalenian hunter-gatherers 15,000 years ago found something interesting about the heat damage on some of the stones. The damage is consistent with being intentionally positioned near a fire, as opposed to being accidentally burnt. The researchers suggest that this means the stones were carved by the light of a campfire. And they go on to say that this may have even, “activated an evolutionary capacity designed to protect us from predators called ‘Pareidolia’.”