Megalodon jaw recreation.
Apparently in Renaissance time, people would find Megalodon teeth, which are the size of stop signs, and think they had found fossilized dragon tongues. The megalodon is actually a prehistoric shark from 28-1.5 million years ago that was more than 50 feet long, and probably could eat like ten dragons. Just in case you wanted visions of something other than sugar plums dancing in your head tonight.