Mjölnir (literally "that which smashes") is depicted in Norse mythology as a fearsome weapon, capable of leveling mountains.

One of the most complex and enigmatic characters in Norse mythology, Odin is the one-eyed God of war and death, as well as wisdom and poetry. He is often accompanied by his animal companions--the wolves Geri and Freki and the ravens Huginn and Muninn, who bring him information from all over Midgard

Ragnarök is an important event in Norse mythology, and has been the subject of scholarly discourse and theory throughout the history of Germanic studies. The event is attested primarily in the Poetic Edda and foretells the death not only of Thor, but also of Odin, Tyr, Freyr, Heimdall, and Loki.

In Norse mythology, the Nine Mothers of Heimdall are nine sisters who gave birth to the god Heimdall, the all-seeing and all-hearing guardian sentry of Asgard who keeps watch for the onset of Ragnarök.

After an initial rivalry for possession of Mjölnir, the alien warrior Beta Ray Bill was granted a war hammer of his own, called Stormbreaker.

Like all Asgardians, Thor is incredibly long-lived and relies upon periodic consumption of the Golden Apples of Idunn to sustain his extended lifespan, which to date has lasted many millennia.

Thor has a chariot drawn by two huge mystical goats called Toothgnasher and Toothgrinder that can fly nearly anywhere he desires.

In Norse mythology, Megingjord is Thor's enchanted Belt of Strength. When worn, the belt doubles Thor's already legendary strength.

Jane Foster first appeared in Journey into Mystery #84 as a nurse employed by Dr. Donald Blake, Thor's first mortal host.

Thor appeared in The Avengers #1 (Sept. 1963) as a founding member of the team. He has appeared in every subsequent volume of the series.