Labor Day celebrates a historical American victory against horrible work conditions and long hours—but today, people are back to working long hours. Then, Thanks to the pandemic, some workers are going digital in search of a more “nomadic” lifestyle. And, artificial intelligence and their human teams compete in a music-making competition. Also, on today’s show: why labor unions embrace undocumented workers, even though they used to see them as job threats; tiny computers reveal the secrets of tiny animals; sharks used to swim our oceans in vast numbers, but they’ve disappearing now.