I'm pretty sure that crop circles are just applications of aether physics that people in and above our governments have perfected, but I also think there is reason to believe that some of them are otherworldly since reports of crop circles have been around for 100s of years. But I think most of them are just from people with the technology to make them, screwing with us.

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“Some even believe we (the Rockefeller family) are part of a secret cabal working against the best interests of the United States, characterizing my family and me as ‘internationalists’ and of conspiring with others around the world to build a more integrated global political and economic structure – one world, if you will. If that's the charge, I stand guilty, and I am proud of it.”
- David Rockefeller, Memoirs, page 405