Mini-black holes

Mini-black holes formed during the big bang could still exist today, slowly evaporating over billions of years. Their potential presence offers insights into cosmic evolution and black hole properties, but they have not yet been detected.
 Stephen Hawking England 1971 Mini-black holes

Mini-black holes formed during the big bang could still exist today, slowly evaporating over billions of years. Their potential presence offers insights into cosmic evolution and black hole properties, but they have not yet been detected.