Talk:Singularity/@comment-25300287-20161212095009/@comment-26488146-20170513205926

Holes in space-time caused by extreme gravity, such as a star collapsing. Actually, that is the definition of a Black Hole, which is what most people think of when they hear Singularity. A Singularity is a point in space-time that is infinitely dense, and Black Holes are a type of Singularity because their gravity becomes infinitely dense. That is the short answer.