Source: screenrant.com

8. Why are there two Infinity Gauntlets?

This one was long thought to be a plot hole, but the fine folks at the Marvel Cinematic Universe Wiki cleared it up. However, clearing it up resulted in a different mystery.

In Thor, an Infinity Gauntlet can be spotted among Odin's belongings in the trophy room. This one looked like it was decked out in all of the Infinity Gems…I'm not gonna call them "stones"; "stones" sounds dumb…*sigh*…"Stones", which would be a big deal.

However, after Avengers: Age of Ultron, Thanos got annoyed and retrieved his Infinity Gauntlet from his own big vault to go collecting Infinity Stones himself. But, what the hey, wasn't this a plot hole? How'd he steal the Infinity Gauntlet from Odin? Well, he didn't! Yeah, remember the Gauntlet in Odin's vault? That was the right-handed one. Thanos' was the left-handed one. There were two. But why? There was only one set of Infinity Stones?

So what's the mystery here?