The NAZIs did have a flying saucer program, not based upon antigravity but straightforward boundary layer control as laid down by Prandtl in the 1920’s. The allies won the war & got all their secrets.
Why would $multibillion companies like Mitsubishi, STMicro, Toyota, and National Instruments stick their necks out for something like the hollow earth theory?
I was referring specifically to the anti gravity “zero-point energy” based power systems. I figured you’ve probably seen videos online.(conspiracy theory explanations)
You seem like a smart guy, I don’t know why you waste your scientific inquisitiveness on cold fusion, LENR, and specifically Rossi.