One of the areas that the fist chapter of The Knowledge explores is how the world will change after the fall of civilisation, as our cities crumble and collapse and the land returns to forest. This is an aesthetic trope explored very well in sci-fi films like I Am Legend or computer games such as The Last of Us or Fallout. But there are also plenty of real-life places that have been abandoned by humanity and are reverting to nature (and recorded by artistic movement known as ruin porn). One of the most notorious is Pripyat, a city close to the Chernobyl nuclear power station that was abandoned after the reactor melted down in 1986. 30 years later, Pripyat is a hauntingly beautiful landscape, eerily quiet of human life but teeming with nature. Watch this incredible drone footage exploring Pripyat.