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Proponents think they've found proof.
Most don't even require falling in.
Fuzzballs, MECOs, boson stars, oh my!
Scientists have suspected it for decades, and now there's some proof.
When it formed, space wasn't transparent yet.
They're basically natural Death Stars.
Black holes: Getting scarier every day.
What comes between normal-size and supermassive?
Alert Spinal Tap. The magic number is a multiple of 11.