10. His first appearance was in a Hulk comic (as a villain).
They even made his character somewhat similar. He's short-tempered, almost indestructible, and can heal extremely fast. Fans liked him so they decided to give him his own series along with the X-Men.
The two have a history of battles and he's among the few characters who can go toe to toe with Hulk. Hulk has won majority of their fights but even he admits that he usually has a hard time against Wolverine.
9. He can lift more than a ton.
The Adamantium in his skeleton gives him superhuman strength. Normally our muscles don't work to their full potential in order to prevent any damage from being done to our bodies. Wolverine's mind has adapted to the fact that his bones are nearly indestructible and this lets him push his body to its limits.
Also add the fact that Adamantium bones can support much more weight than organic human ones.
Adamantium bones also give him superhuman speed, durability, and stamina, but take a toll on his healing factor (which is still extremely fast).
8. He was the first Canadian superhero.
7. He's been part of over 30 teams.
He's worked with the X-Men and Avengers consistently, but he's also been part of the Defenders, S.H.I.E.L.D., Fantastic Four, and many more.
Fox has the movie rights to both X-Men and Fantastic Four, so I'm not sure why they don't make this happen (or at least make a good Fantastic Four film).
6. Hugh Jackman is too tall to play him.
Wolverine is 5'3". Jackman is 6'2".
This doesn't bother me though. It's hard to imagine anyone else playing the role.
5. He knows more than a dozen different languages.
He's fluent in English, Japanese, Russian, Chinese, Cheyenne, Spanish, Arabic, and Lakota.
He also has knowledge in French, Filipino, Thai, Vietnamese, German, Italian, Portuguese, Korean, Hindi, and Persian.
4. He once fought Spock.
This is when Marvel was bankrupt and desperate, so they started having crossovers. This was an easy win for Spock.
3. He was originally supposed to be a teenager.
A teenager with gloves, to be more precise. They had many plans for his origin. One even included a real Wolverine that mutated into a humanoid creature. According to another one, he was supposed to be completely disfigured because of the Weapon X program, just like Deadpool.
2. He fought alongside Captain America during the second World War.
He's also much older and wasn't in the ice for decades, so he's got more fighting experience and had more training. They were two of the best soldiers during the time.
He's also trained many different characters including Black Widow.
1. He can increase some of his physical attributes unintentionally at times.
As I said in #9, his mind usually ignores the limits placed on his body. There are times when he goes into a rage (just like Hulk) and these limits are completely ignored. This state is usually known as berserker's rage.
My next one is going to be about Wonder Woman :)