GIANT ANTIMATTER ISLANDS. “If the charge symmetry is broken spontaneously, then domains of matter and antimatter may exist but the size of domains is expected to be cosmologically large, at the Gigaparsec level. Therefore, the accepted faith is that if even macroscopically large objects or regions consisting of antimatter exist, they should be far away from us at the edge of the universe or at least at distances beyond 10 Mpc.”
https://lnkd.in/d_CXigJS