Re: The failure of the unified field theory means general relativity fails.

"In electrodynamics, the retarded potentials are the electromagnetic
potentials for the electromagnetic field generated by time-varying
electric current or charge distributions in the past." - Wikipedia
"The anomalous precession of Mercury’s perihelion can be explained by
taking into account the second order in the delay of the retarded
potential (7) which is an approximation of the retarded potential (8)."
-Ibid (Gine)