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Screengrab from "His Dark Materials" on HBO

In the first book of Philip Pullman’s His Dark Materials trilogy, The Golden Compass, Lord Asriel (played by James McAvoy in HBO’s adaptation of the book) discovers a mysterious substance, called Dust, that exists everywhere and seems to be implicated in consciousness. For Pullman, Dust is an expression of his fascination with panpsychism, the philosophical idea that matter is imbued with phenomenal experience. (HBO / YouTube)