A robotic spacecraft has been in Saturn’s orbit for three years, studying the planet and its moons. On today’s Underreported, two members of the mission explain how their discoveries provide insight into our own origins on Earth. Then, why up to 1 million people still speak the universal language Esperanto. Plus, Ann Patchett on her fifth and latest novel. And we’re joined by three of this year’s Lasker Award winners, the medical profession’s answer to the Nobel Prize.