What is Gravity? What is Anti-Gravity? Instant Expert - The Complete Guide

https://www.thedrive.com/the-war-zone/30499/the-truth-is-the-military-has-been-researching-anti-gravity-for-nearly-70-years

http://hoverbrothers.com/theory/

Can We Hide Gravitational Sources behind Rindler Horizons?
http://www.ptep-online.com/2019/PP-57-05.PDF

https://en.wikipedia.org/wiki/Rindler_coordinates

Bernard Haisch CV:
http://www.calphysics.org/haisch/publications.html

Connecting the exterior gravitational field
with the energy-momentum tensor of axially
symmetric compact objects
https://arxiv.org/pdf/2005.03926.pdf

Quantum researchers able to split one photon into three
https://phys.org/news/2020-02-quantum-photon.html

https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_condensation_of_polaritons

Printable Diamond:
https://en.wikipedia.org/wiki/Poly(hydridocarbyne)