Normally a star with a mass several times that of the sun will become a black hole at the end of the lifetime of that star. Can black holes exist with a mass much smaller than that exist? In other words, are black holes with a mass of Jupiter or even Earth exist? Or even much smaller than that? I can remember having read somewhere that a theory of Stephen Hawking predicts that (small) black holes in time will evaporate. So is there a theoretical limit of mass a black hole should have? This question arose when some people mentioned that the large hadron collider could create (a) black hole(s).