What are black holes?

Einstein predicted them. How do they form? What exactly are black holes? Support us in Patreon!   / curiosamente   Follow us on social networks: http://curiosamente.com/redes Screenplay: Tonatiuh Moreno Illustrations: Ruy Fernando Estrada, Sandra Cardenas, Sergio Rivera Voice: Javier Lacroix Music: Mary Camarena and Jorge Verdin Additional Music: Learning is Fun, Doug Maxwell Sound Effects: http://freesound.org/