: : : Hello, : : I am trying to learn more about black holes. I was reading and : : came across the term singularity a lot and never found a good : : explanation. I know it is probably known by many but I a a newbie in : : this area. : : I was also wondering about something I read in a faq paper. It : : said once you are in the horizon. Space and time switch up so trying to : : leave out of the horizon is like avoiding tomorrow. Can someone expalin : : this to me. : : I know these are simple questions but I am curious. : : Thanks : singularity is the single point of space even smaller than the atom from which all matter came during the big bang roughly 15 billion years ago......it may have resulted from the "big crunch" if the universe is such that it constantly repeats a cycle of big bang, expansion, contraction, big crunch, big bang, expansion, contraction, big crunch, etc.