A career as a model, musician, or actor can only last so long. Unless you’re Meryl Streep or Jack Nicholson, roles will start to dry up as you show your age. The shelf-life of an athletic career is even shorter, because every year takes away from your ability to compete with younger rivals, way before she start to look old. Many of these celebrities take on a different career later in life, often something very different. John Green fills us in on thirty of these post-celebrity careers in this week’s mental_floss List Show.