Robin Hanson invites us to consider whether ghosties really exist, and are made of dark matter. He makes a good point – though neither he nor I believe in ghosts. I don’t even know about dark matter.
I’m more interested in the science fiction. A commenter points out that Philip Pullman already thought of this in His Dark Materials, and I would point to Alastair Reynolds’ Pushing Ice. Any others?
Click to stay tuned
