1. So who exactly built all this Asgardian technology?
Because this just seems above Odin's pay grade. And you can't really believe a the equivalent of Asgardian teenagers got their heads out of their own asses long enough to get the engineering education necessary to construct floating modern art, a giant chicken head that shoots laser teleport beams, and a mountain top fortress. These people are clearly living in the remains of an ancient precursor society. But who?