Singularitys are one-dimensionalpoint which contains a huge mass in an infinitely small space, where density andgravity become infinite and space-time curves infinitely, and where the laws of physics as we know them cease to operate. As the eminent American physicist Kip Thorne describes it, it...
Anything can become a black hole theoretically! If you was to take the mass of Mount Everest and compress that same mass into the size of a pin head that mass will become a singularity.