Some researchers believe a singularity can be removed from a black hole (have no event horizon) and this would be a wormhole.

They modelled observers (objects like a chair, a scientist, and a spacecraft ) as an aggregation of points connected by physical or chemical interactions that hold everything together as the object travels along a geodesic line. A geodesic line is simply the path in spacetime that a free-falling object follows.

“Each particle of the observer follows a geodesic line determined by the gravitational field,” says Rubiera-Garcia. “Each geodesic feels a slightly different gravitational force, but the interactions among the constituents of the body could nonetheless sustain the body.”

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