Kaysing would come to assert in a new vein of writing that came to fruition in the mid-1970s, that during his much earlier tenure at Rocketdyne he was privy to documents pertaining to the Mercury, Gemini, Atlas, and Apollo programs, and argued that one did not need an engineering or science degree to determine that a hoax was being perpetrated.

[non-primary source needed][3] Kaysing also claimed that NASA staged both the Apollo 1 fire and the Space Shuttle Challenger accident, deliberately murdering the astronauts on board, suggesting that NASA might have learned that these astronauts were about to expose the conspiracy and needed to guarantee their silence.

[citation needed] A vocal advocate of other conspiracy theories, Kaysing believed there to be a high-level conspiracy involving the Central Intelligence Agency, Federal Reserve, Internal Revenue Service and other government agencies to brainwash the American public, poison their food supply, and control the media.

][citation needed] Kaysing was a participant in the Fox documentary, Conspiracy Theory: Did We Land on the Moon?, which aired on February 15, 2001.

On August 29, 1996, Kaysing filed a defamation lawsuit in Santa Cruz County Superior Court against astronaut Jim Lovell for calling his claims "wacky" in an article by Rafer Guzmán for Metro Silicon Valley.

[13] Kaysing describes preparation for the launch[clarification needed] as normal,[citation needed] but since Rocketdyne F-1 engines in the first stage of the Saturn V rocket were "totally unreliable," a cluster of "five booster engines of the more dependable B-1 type as used in the C-1 cluster for the Atlas missile" were secretly installed, one inside each of the Saturn V's five F-1s.

But from 2013 onward, Galuppini started publishing blog articles propagating false claims about the Earth being flat and all space travel being faked.

Many of these articles misappropriated Kaysing’s moon hoax views to promote Galuppini’s Flat Earth claims.