well, it's good to meet you finally in person, dr. wilson and as i'm sure michelle said, welcome back to the library of philadelphia and back to philadelphia. so i wanted to start off in just sort of getting to know you this evening as we were having dinner, i wanted to give our audience a chance to do that as well. one of the things i wanted to ask, um, you know, as michelle was going through your many accomplishments, you're a very talented man, and you clearly could have been, done extremely well in any field you would have chosen. what made you choose biology? >> a biographical question, thank you for making it easy. [laughter] >> we have to let dessert settle. >> well, and not starting by saying, all right, what do you mean by existence? [laughter] >> we'll get to that. >> easy question. i grew up in the deep south where i had access to comfortable outdoor life almost every day, and in the course of which -- and i was allowed to, well, i wasn't allowed. my parents didn't know about it. [laughter] to go anywhere i wanted to go in the bac