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As our world’s population continues to grow, some cities have become incredibly crowded, with millions of people living in cramped conditions. In this video, we’ll take you on a tour of the 20 most densely populated places on Earth, from the towering skyscrapers of Hong Kong to the slums of Mumbai. We’ll explore the challenges…… Read More

Check out our new website for more incredible history documentaries: HD and ad-free. http://bit.ly/2O6zUsK During the Second World War the Allies used information about the secret sex lives of the Nazis to try and bring down the Third Reich. Sex And The Swastika reveals the existence of a top secret government department whose job was…… Read More