The fourth episode of the BBC documentary series Universe is titled "Black Holes: Heart of Darkness". In this episode, Professor Brian Cox explores the black hole at the center of our galaxy. <br /><br />What's in the episode? <br />1. Cox explores the black hole's potential to destroy worlds and stop time. <br />2. He considers how the black hole forces us to reconsider our understanding of reality. <br />3. He uses new data from the black hole to challenge the concept of reality. <br /><br />Other episodes in the series include: "The Big Bang: Before the Dawn, "The Milky Way: Island of Light, "Alien Worlds: The Search for Second Earth, and "The Sun: God Star. <br /><br />About the series <br />1. Universe is a BBC documentary series that explores the universe and our place in it. <br />2. The series includes topics such as the formation of the Earth, the formation of the Moon, and the potential for life on other planets. <br /><br />Thanks for watching. Follow for more videos and show your support for us <br />#cosmos <br />#universe <br />#briancox <br />#blackholes <br />#cosmosspacescience <br />#cosmology <br />#astronomy <br />