In 1841 the English paleontologist Sir Richard Owen coined the term "dinosaur" from the ancient Greek deinos ("terrible") and saurous ("lizard or reptile"). At the time knowledge of dinosaurs was extremely limited with just three species initially placed in the new suborder - Iguanodon, Megalosaurus and Hylaeosaurus.
Scientific ideas about dinosaurs advanced rapidly and continued to do so - the dinosaurs of Prehistoric Planet (2022) are already nigh unrecognisable from the beasts that haunted my dino books as a child in the 1980s and 1990s let alone their Victorian ancestors - but they have consistently caught the public imagination. There are even dinosaur 'superstars' most people would recognise - Tyrannosaurus rex, Triceratops, Diplodocus, Stegosaurus...
So taking 1841 as a starting date how would our views of dinosaurs change if we had made certain discoveries later or sooner or not at all? Tyrannosaurus for instance is pretty much *the* dinosaur in pop culture (and rightfully so, they were awesome) but so much of it's fame derives from having a truly fantastic name (see also Brontosaurus), being found in fairly good conditions and getting a blaze of publicity right out of the gate.
Imagine evidence of feathers is found on a large dinosaur in the Victorian age (maybe Yutyrannus is described a century and a half before our time). How would that shape perceptions of dinosaurs? Or conversely imagine a 'rock star' dinosaur like the Tyrannosaurus isn't found until much later? What if anything would fill the gap in popular consciousness?
(I'm also intrigued by the idea of giving an unfairly obscure dinosaur a 'boost' with a cool name but I fear I'll have to leave any ideas there to people with much better Greek! )