Primordial black holes
Concept
Black holes that could have formed in the early universe and may constitute a portion of dark matter.
Mentioned in 2 videos
Videos Mentioning Primordial black holes

How scientists at Fermilab search for dark matter particles
Fermilab
Black holes that could have formed in the early universe and may constitute a portion of dark matter.

(Audio-only Podcast) String theory nonsense makes comeback -- And other news of the week
Sabine Hossenfelder
Black holes potentially formed in the early universe which have been considered as candidates for dark matter but largely discarded due to observational conflicts.