The conversation between human and AI assistant.
In The Avengers, how does Thor return to earth, given that in Thor, he destroyed the Bifrost Bridge (the wormhole which makes inter-planetary travel possible) at the end of the movie?
Okay, that makes sense. But why did Loki need Thor to come to earth?
Loki needed Thor to come to earth because he wanted the Tesseract, a powerful energy source that was being studied by S.H.I.E.L.D. on earth. Loki believed that if he could get his hands on the Tesseract, he could use its power to conquer other worlds.