I have a question about what happens if: A collapsing star (with an appropriate mass <20solar masses) forms a "donut" shape as it collapses. (first, is that possible?) and would it generate a wormhole travelling through the "donuts" center? The only thing that causes me to believe it would is that there is no singularity there to stop the passage of space/time like there would be in a "normal" black hole. I would think that this kind of event would be rare and even moreso for two of these "donuts" to line up or "couple" which would extend the range of a wormhole. I can also "see" (minds eye) that it would not be a permanent situation. Eventually the "donut" would have to collapse into a "normal" wormhole, wouldn't it?