For Leonardo's 50th birthday, I spoke with longtime collaborators of the international society for the arts, sciences and technology, almost sang happy birthday, and definitely missed out on cake.

Listen: Happy Birthday, Leonardo!
Guest: Christa Sommerer
Guest: Herbert W. Franke
Guest: Victoria Vesna
Guest: Tamiko Thiel
Guest: Pier Luigi Capucci
Guest: Pau Alsina
Guest: Jadwiga Charzynska