1. Several infamous Marvel artifacts can be seen in the Asgard weapons vault scene:
The Eye of Agamotto
The Orb of Agamotto
The Eternal Flame
the Tablet of Life and Time
The Infinity Gauntlet
The Casket of Ancient Winters
2. At one point, Dr. Selvig mentions a colleague doing work with S.H.I.E.L.D.. He described the colleague as "a pioneer in gamma radiation." He's talking about Bruce Banner, whose experiments with gamma radiation gave him the ability to transform into the Hulk.
3. There's also a deleted scene in which Dr. Selvig mentions Hank Pym, also known as Ant-Man.
4. Stan Lee said he wanted to play Odin.
5. Jim Carrey was considered for the role of Loki. He actually played Loki before in The Mask.
6. S.H.I.E.L.D. agents initially think that the Destroyer belongs to Tony Stark. In the comic books, Tony Stark actually does acquire Destroyer armor from Asgard.
7. The Norwegian village seen in the flashback in Thor is the same village seen at the beginning of Captain America: The First Avenger.
8. At one point, Jane lends Thor a shirt that she said belonged to an old boyfriend with a forgotten name tag on it that reads "Donald Blake M.D.". Dr. Donald Blake is Thor's alter-ego in the comic books.
9. "Puente Antiguo", the small town in which most of the movie is set, translates to "old bridge". This is likely a hint at the towns role as a destination for gods using the Bifrost bridge.
10. In the background of one scene in the small town, you can see a water tower that says "Welcome. Home of the Vikings."
11. One billboard for New Mexico tourism seen in the background of one shot featured the slogan "Land of Enchantment - Journey into Mystery". "Journey into Mystery" was the original Marvel comic book that Thor debuted in.
12. One of the most respected writers of the "Thor" comics, J. Michael Straczynski, tries to lift Mjolnir in a cameo.
13. Stan Lee, who created Thor, also makes a cameo as the truck driver who attempts to tow Mjolnir out of the ground.
14. Yet another Thor writer/artist, Walter Simonson, makes a cameo sitting next to Sif during the banquet scene.
15. Marvel sent director Kenneth Branagh the complete collection of the Thor comics to prepare him for directing the film.
16. Tom Hiddleston couldn't stand wearing Loki's helmet, and claimed that he channeled that discomfort into the role.
17. There were actually three physicists from the Science & Entertainment Exchange on staff for the film to provide scientific background. Their suggestions led to Jane Foster's profession being changed to to a physicist, as well as the use of the term "Einstein-Rosen bridge" to describe the Bifrost.
18. One scene in the film was actually directed by Joss Whedon. (The post-credits scene, which tied this film to The Avengers.)
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