system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel MCU Captain America] How did the Tesseract end up on Earth in the first place?
gpt
Odin decided to leave it there in a hidden place in Norway.  Earth is known as Midgard under the influence of Asgard, which is why other alien races haven't frequently visited it as much as other places in the cosmos, and it's unwise to have too many things powerful things in the weapons vault.  Its use by HYDRA, S.H.I.E.L.D. and Loki on Earth made him reconsider and relocate it to the vault when Thor used it to return after the Battle of New York.