[oxwnjcis] Black hole mass distribution

It's interesting how, at the moment before a mass falls into a black hole, we can measure the external gravitational field and see that it is a dipole.  A moment later, information about the internal mass distribution cannot cross the event horizon, so the dipole moment instantaneously disappears.

Curved space probably has something to do with it.

How is it that only information on mass, charge, and spin can cross the escape horizon?  What makes them special?  I'm guessing that the information actually gets imprinted on the surface infinitesimally above the horizon.  Which means if bizarre physics is going on inside, violating conservation of mass, charge, or angular momentum, we would never know.

If a black hole with event horizon conceals a wormhole, a spaceship enters, and the mass of the black hole increases by the mass of the spaceship.  But after the spaceship passes through, emerging from a white hole somewhere else in the universe, the mass of the black hole -- the information still imprinted on the event horizon -- remains the same.  The total mass of the universe has increased.  Perhaps the white hole "gains" negative mass (repulsive gravity!) as the spaceship exits.