WHAT DO WE KNOW?
Somewhere in your forearm there is an atom. Circling the nucleus is an electron. On the electron two small bipeds are standing. The side of the electron they are on is facing away from the nucleus just at present, and they are gazing up at the starlight from distant atoms. Maybe they are on the way home from the pub, or walking their dogs. The night is very still. Says one biped to his companion:
“Do you suppose there’s anything out there?”
“What, are you insane or something?” replies the other.