I had long lived with the delightful but often unnerving realization that my son was smarter than me. He spent his free time reading about and pondering math, logic, philosophy and physics questions. For fun! When he talked to me about math, I’d often have to fake my way through the conversation.

One of these moments of realization was when Graham was eleven, riding in the car on the way home from karate. He started grilling me about astrophysics. “Mom… I just don’t get it. How do you define the *boundaries* of an expanding universe?? What does the edge of the universe even *mean* if the universe is expanding? What is it expanding *into*?”

I still don’t know.

(But I do know he expanded my universe)