Yes, there are primordial black holes, I’m just not certain exactly how dubious their existence is.
Anyway, the point is that if there might be currently evaporating black holes, but we don’t see them, then maybe that’s because they’re not all that bright. Then, despite their high efficiency, they may not be a viable tool for signaling.
Yes, there are primordial black holes, I’m just not certain exactly how dubious their existence is.
Anyway, the point is that if there might be currently evaporating black holes, but we don’t see them, then maybe that’s because they’re not all that bright. Then, despite their high efficiency, they may not be a viable tool for signaling.