Black gap from the time of Huge Bang is perhaps on the precipice of exploding

Based on the idea by Stephen Hawking, black holes emit particles and radiation, which ends up in them steadily dropping mass. Small black holes evaporate quicker, and finally, this course of ends in a last burst. The issue with observing these PBHs exploding is that they might have evaporated already, or their explosions are too uncommon or too weak to detect.