Comment by ck2
Black holes can't be dark matter.
Dark matter is a WIMP
The universe was built on a scaffold of dark matter like an old spiderweb that slowly collects dust.
Black holes can't be dark matter.
Dark matter is a WIMP
The universe was built on a scaffold of dark matter like an old spiderweb that slowly collects dust.
That's another leading hypothesis. Some classes of WIMPs have been ruled out but the whole idea hasn't been.
BTW primordial black holes could still exist even if they aren't a significant dark matter component.