Dino mad Charlie spots mistake on dinosaur exhibition at museum
28 July 2017 Last updated at 15:15 BST
10 years old Charlie definitely knows a thing or two about dinosaurs.
So much so, that when he went on a visit to the Natural History Museum in London, he discovered that they had made a mistake in one of their exhibitions.
Luckily he pointed it out and they were very grateful for his help.
Ricky has more on this story...
(Pictures from BBC Essex)