I sometimes write reference pieces for myself so I can give some context to myself about what I’m writing. Those pieces usually are never seen by others, but they’re useful for me, and they make a better book for everyone else. This is one of those pieces. In the book, humans get around space via “The Flow” — a “metacosmological multidimensional space” that’s not of this universe but lets people get around in it at multiples of the speed of light. I decided I needed to give The Flow an origin story, as well as understand how people discovered it, so I wrote this piece for myself, which I am sharing with you now.