Professional creature designer Terryl Whitlatch, who worked on Star Wars: Episode I, has created some amazing versions of what Marvel's most famous superheroes would have looked like in a land before time.
Scroll down to see the four of the Avengers in dino-form...
Here's what she had to say about her prehistoric Avengers.
"It was fun deciding what dinosaurs should be what characters. I ended up with an Ankylosaur as Iron Man (a no-brainer, as this animal is naturally armored), a Parasaurolophus as Captain America, just because I thought with that crest it would look really funny, a Triceratops as Thor, especially since when it grows up it is actually a Torosaurus, hence Thor-osaurus, and a T-rex as the Hulk so I could give it really muscularly odd little arms.
"It's a breath of fresh air to do fan art, and any excuse to draw dinosaurs is a good one!"