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The existence of black holes was denied by Albert Einstein, even when his own theory pointed in that direction. And today, even though they have been proven by science, they continue to be one of the greatest mysteries of theoretical physics. In this video, Camilla Costa explains what we know (and still need to know) about this fascinating phenomenon. Did you like it? Subscribe to the BBC News Brasil channel! And if you want to read more news, click here: www.bbc.co.uk/portuguese Video sources: Nobel Prizes, asa, “How to See a Black Hole: The Universe's Greatest Mystery” (BBC Four), “Black Holes: A Tale of Cosmic Death and Rebirth” (BBC World Service), “How a silence solved the weird maths inside black holes” (BBC Future), “Agujeros negros y ondas gravitacionales” by Gerardo Herrera Corral. Thanks: Gerardo Herrera Corral; Rodrigo Panosso Macedo, Queen Mary University #BBCNewsBrasil #Science #BlackHoles