You've said this twice now. In persuasive writing, once you state a fact, you must draw a conclusion, clearly. Please, draw for me your conclusion.
Since we're asynchronous, it appears that the conclusion you're drawing is that these texts refer to real things that actually existed: heavier than air flight, spaceflight, test-tube babies, etc. Since we know where (fairly precisely) these things took place, we should have significant archaeological evidence for them. Could you point me to the physical proof of these? Because, I feel like these objects would've come up in my readings, before.
If you're not drawing the conclusion they actually existed, what conclusion are you drawing?