Astrophysicists think that black hole masses are heirarchical. The largest are supermassive black holes (SMBH) like the one at the center of the Milky Way and other galaxies. Stellar mass black holes are born of collapsing stars, and are smaller. The smallest of all are the theoretical primordial black holes, which only formed in the weird physics of the early Universe. Intermediate mass black holes (IMBH) are theorized to lie between stellar mass black holes and SMBH in the mass hierarchy. They have masses between 10 2 and 10 5 solar masses. The problem is, they've never been confirmed. Researchers found evidence of one in Omega Centauri in 2008, but subsequent research disputed that claim. As it stands now, the existence of IMBH is still unknown. *Some of the most compelling evidence of an intermediate mass black hole comes from the globular cluster Omega Centauri, the largest globular cluster in the Milky Way.…