Do you believe in aliens? With the universe being so vast, it makes sense that somewhere another advanced civilization is developing, but where are they? And why we have not heard from them yet? We answer these questions and more in this week´s episode. -- Sources: Charles Krauthammer (2011): Are We Alone in the Universe? The Washington Post / Kristen A. Hite; John L. Seitz (2020): Global Issues : an introduction. Wiley-Blackwell. / Tim Urban (2014): The Fermi Paradox. Huffington Post / Chris Impe (2011): The Living Cosmos: Our Search for Life in the Universe. Cambridge University Press. / Stephen Webb (2002): If the Universe Is Teeming with Aliens... Where Is Everybody? Fifty solutions to the Fermi Paradox and the Problem of Extraterrestrial Life. Copernicus Books.