Amy Eskridge worked on "anti-gravity" propulsion research for NASA before starting up on her own in the early 2000s. They did eventually kill her in 2022 after years of intimidation because she wanted to go public with it.
What I found interesting and she seemed quite certain Ken Wheeler had figured it out. His research centres around the Aether, suggesting that magnetism, electricity, dielectricity and gravity are all field modalities of the Aether, building on the electrical field theory work of Nikola Tesla, Charles Steinmetz, Oliver Heaviside and Eric Dollard.
I never see any of these people developing the ideas of Einstein. Why? Because his theory of relativity (developed off of the stolen work of Henri Poincare) was proposed as an alternative to the Aether, and I am of the mind that it is utter nonsense.
https://video.nostr.build/2866f0e2ea31f200cf8540f73c4ef793f2babbb15ac058c5a180f866bc20502f.mp4