Two roads diverge between a pair of quasars, and I'm sorry I can't travel both — actually, wait, I can travel both. I'm "standing" inside a cavernous galactic space in virtual reality, and with a few ...

I realize that's not especially unique, as plenty of kids dream of growing up to be astronauts, flying rocket ships and walking on the moon. Unfortunately, math was not my forte in school. I'm not ...