Heredity

("Big Alex," Felton Street in Waltham, MA)


I was reminded during a recent visit with my sister how much I loved big rigs when I was young. She's five years older than I am, and told me that to this day she remembers the difference between a cabover and a conventional truck tractor because of how obsessed I was with spotting 18-wheelers.

Previously, I hadn't thought about how similar my one-time appreciation for big trucks is to my 9-year-old son Owen's current love of subway trains. I used to r...