Also, potentially affecting any study of GW gravitational waves with photons, > If photons come from gravity, can photons end as gravity; and then do they have

Also, potentially affecting any study of GW gravitational waves with photons, > If photons come from gravity, can photons end as gravity; and then do they have an infinite lifetime? https://news.ycombinator.com/item?id=40090332 https://news.ycombinator.com/item?id=40090332