PBS Space Time, Does Antimatter Create Anti-Gravity?, Season 9, Episode 35

Does antimatter fall down, or does it fall up?

PBS Space Time: What If Gravity is Not Quantum?

Physical cosmology - Wikipedia

PBS Space Time: Where to Watch and Stream Online

PBS Space Time

Quantum Reality and Cosmology

PBS Space Time: What If Gravity is Not Quantum?

Anti-Worlds, Anti-Gravity Planets and Star Drives

PBS Space Time, Anti-Matter and Quantum Relativity, Season 3, Episode 28

PBS Space Time, Is Gravity An Illusion?, Season 1, Episode 17

Observation of the effect of gravity on the motion of antimatter

PDF) The Complete Guide to Quantum Gravity

Hermann Weyl

PBS Space Time, What If Our Understanding of Gravity Is Wrong?, Season 7, Episode 35

theory - Search PBS Space Time