In the early universe, primordial black holes could acquire a "dark charge," giving them an unnaturally long lifetime, new research suggests. This makes them an interesting candidate for dark matter.

What is dark matter made of? New study bolsters case for 'primordial' black holes

Source: space
Source Link: https://www.space.com/the-universe/black-holes/what-is-dark-matter-made-of-new-study-bolsters-case-for-primordial-black-holes