What is the chance of the human race surviving the 21st century? There are many dangers – climate change for example, or nuclear war, or a pandemic, or planet Earth being hit by a giant asteroid.
Around the world a number of research centres have sprung up to investigate and mitigate what’s called existential risk. How precarious is our civilisation and what can be done to stop a global catastrophe? David Edmonds talks to four expert witnesses to try and find the answer.
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