what dinosaur has 500 teeth meme

The dinosaur with 500 teeth is called Nigersaurus. It was a type of rebbachisaurid sauropod dinosaur that lived about 115 to 105 million years ago, in the Cretaceous period. Nigersaurus had a long neck and a whopping 500 slender, replaceable teeth. Its name is a reference to where it was discovered, the Republic of Niger. The meme asking "what dinosaur has 500 teeth?" originated on Reddit in 2019 and spread primarily on that platform and YouTube.