15WOLVERINE IS A LUPINE
Wolverine is one of the most popular and fiercest superheroes in the Marvel Universe, a mutant whose healing factor allowed him to survive a process that bonded his skeleton with unbreakable adamantium. At least, that's how his origin has been described until 2007's Wolverine #53 (Jeph Loeb, Simone
That's when Wolverine met a supervillain named Romulus who turned out to have secretly planned every horrible thing that ever happened to Logan. See, Romulus was part of a species that evolved from canines instead of primates called Lupines, and said Logan was a Lupine, too. The idea of Wolverine being a Lupine instead of a mutant didn't make much sense, leading to a reversal in 2012's Wolverine #312 (Jeph Loeb, Simone Bianchi). Romulus’ sister Remus basically told Wolverine her brother was lying, and everyone just tried to forget it.