Our solar system might be chock-full of tiny black holes, with some tracing out beautiful patterns resembling Spirograph drawings as they orbit inside the sun.
Invisible dark matter seems to account for the vast majority of mass in the universe, but scientists don’t know what exactly it is. Hypothetical black holes that formed shortly after the big bang, called primordial black holes, are one dark matter candidate. If they do exist, our solar system should be full of them.