The number of black holes in our universe as far as we know is way smaller than the number of stars or planets. Dan O'Neill says, do you feel physicalism in your bones? For example, when in conversation with another human being, are you comfortably able to think of them as a purely physical system? Or would you have to stop and remind yourself of this fact? Roo Phillips says, there's a great new documentary on Netflix called A Trip to Infinity, Complete With Multiple Mindscape Guests. There's a really moving part where Alan Lightman talks about how he was very depressed and sad about being a spec in an indifferent universe doomed to nothingness.