“no-hair theorem.” In a nutshell, this theorem says that you can completely describe a given black hole by only three quantities: its mass, its electric charge, and its rate of rotation. This means that any two black holes with the same mass, charge, and spin are completely identical in every respect. From this it follows that an electrically neutral black hole that forms out of matter is exactly the same as one that forms out of antimatter. The black hole’s gravity essentially erases the net number of quarks that went into its formation. And although physicists still debate the full
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