This paper shall discuss black holes and their nature. The paper will briefly open with a discussion of the general properties of black holes, as identified by scientists and astronomers. Then, the paper will examine the newer concept of super massive black holes, said to exist in the centre of all galaxies. Super massive black holes will be elaborated upon by drawing on actual research being done. Particularly, the paper will use the example of evidence of a super massive black hole discovered in the galaxy M87.