Yes, I agree with your theory that these massive animals were supported by anti-gravitation devices developed by advanced extraterrestrials.What?
You mean that’s NOT your theory? Oh... you are right then, it is far far better to mock what you can ignore rather than try to explain it. So much easier!
What *is* your explanation for how the massive sauropods could have lived? We know that all physics and biology as known today would NOT support such massive sizes.