Wait till the fourth species of Pachyrhinosaurus is discovered, with a horn.

I do have to say that The Dinosaurs! Pachyrhinosaurus actually looks cool.

2022: A fourth species of Pachyrhinosaurus has been discovered that has a horn, scientist call it "Pachyrhinosaurus ceratus" meaning "Horned Thick Nose Lizard"

2024: There's a theory that Pachyrhinosaurus ceratus is a different genus and not a species of Pachyrhinosaurus

2026: Pachyrhinosaurus ceratus has enough differences to determine it as a different genus, it changed Pachyrhinosaurus ceratus to Alloceratops gigantea meaning " Giant Different Horned Lizard"

2028: Paleontologists discovered that all Pachyrhinosaurus had horns, we just kept finding broken ones for some reason, because of that Alloceratops has been synonymized with Pachyrhinosaurus and Pachyrhinosaurus ceratus returns

2030: It turns out that Pachyrhinosaurus ceratus is actually a synonym of Pachyrhinosaurus canadensis, it from being a species of Pachyrhinosaurus to a new genus to a species of Pachycephalosaurus again and than turned out to be something we already knew about

Lol

2035: It turns out that the horn actually belenoged to a diffirent ceratopsian that happened to die near the pachyrhinosaurus.

2042: It turns out Philip J Currie was trolling us the whole time, and that he just built the Pachyrhinosaurus skeletons out of clay and turns out Pachyrhinosaurus never existed and was just a hoax.

2069: It turns out that Dinosaurs aren't actually animals, instead they were aliens that crash landed on Earth on the permian meteor that was actually a spaceship.

3000: potato

3021: It turns out that a hundred years ago, people thought dinosaurs were animals