Carl Sagan brings to mind two things.
1. Seeing the film Contact with my mom several years ago and finding it to be a vaguely spiritual experience (this coming from someone whose thoughts on religion are basically in line with Carl's).
2. Watching a few episodes of Cosmos with the authors of this site and some other high school friends on a weekend visit to Boston (during the 2004 DNC, in fact) and discussing how it was one of the most subversive television pieces ever created.
Carl, I should probably spend some more time with you. But these are good memories, so thanks.
Chris, in Chicago