I’m sure someone will chime in with more reason but I find this interesting. At first glance the skull looks mega alien. However I bet good paleontologist (good ones at least) compare characteristics between ancient and recent age bones. Then they can sorta make out what the creature prob looked like. The difficulty is coming across a creature that has nothing to compare to or is very alien to the creatures in the region you found it.
I feel like I get the joke, but I’d like it explained in hopes that it’s better than what I think it is.