Inky paw prints presumably left by a curious kitty on a 15th century manuscript.
From National Geographic.
Me: And then reviewers will be like, "Omg that's totally out of canon."
Me: And I'll be like, "Bitch, I am the canon."
chris control your goddamn face you have just gone through an extremely painful super-serum transformation you did not just have the diddly doo orgasm