I have gushed before, I believe, about my nephew's striking resemblance to my sister as a baby. It touches me so much because seeing him brought up visceral memories I didn't know I had. I was 3 when she was born and I have plenty of memories, but holding S., kissing his bald head, and seeing his little face scrunch up in tears touches something deep inside.
So here is Before: my sister the day after her birth in November 1977. My mom propped her up against the lion to show how tiny she was at 5 lbs. We're sitting in my bed. (We were both born at home.)
And here is After: nephew S. at about one week old, in October 2006.