Wolverine and Sabretooth were never related and Logan never had bone claws all retcons to get more mainstream audiences and casual comic book readers interested....
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Wolverine's bone claws go back to 1993, so they're not all that new either. They've been around for 20 years now, which is half as long as Wolverine has existed as a character.
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I thought he did, prior to his Weapon X augmentation? I thought that was the case, but could well be wrong...
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He did/ does have bone claws under the adamantium in the comics.