Complex sentence: Andreas Grünschloß notes that Scientology's space opera teachings place them in the tradition of the ancient astronaut hypothesis; he states that the group's teachings about thetans bears similarities to walk-ins and star seeds found in UFO religions.
Split into simpler sentences: Andreas Grünschloß notes that Scientology's space opera teachings place them in the tradition of the ancient astronaut hypothesis. He states that the group's teachings about thetans bears similarities to walk-ins and star seeds found in UFO religions.