Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
AMA | September 2024
Sean Carroll
You need to invent some very weird physics in the early universe to get enough black holes to be dark matter. And then you want them to be not too heavy or not too light, not too heavy you haven't already noticed, not too light they already evaporated away, right? So it's a very weird set of circumstances, but it's allowed and it's nice because black holes are known to exist.
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