Hints： singularity bizarre 41’处有一冒号（: ）

What happens at the center of the singularity is a complete mystery. And solving it is going to require new physics that we just don't have right now. Some people think you can fall through the singularity and pop out in another part of the universe. The theories for the singularity are, some of them are very, very radical. We just don't know.
Supermassive black holes are so bizarre that until recently many scientists doubted they existed at all. They were an extreme idea dreamt up to explain a very rare and distant type of galaxy: active galaxies. These are amongst the brightest objects in the universe. These galaxies have a brilliant burning core with vast jets of energy spurting out of the center.

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