Comment by gwern

The quote at the end from Eiseley is more interesting than it sounds: https://www.101bananas.com/library2/eiseley1.html It's about a crow being terrified to nearly fly into Eiseley's head on an extremely foggy day (where you couldn't see the ground), and Eiseley speculating that the crow inferred that Eiseley, uniquely among humans, had somehow learned to walk in the sky, and was scared of him ever after.