Constant Wonder

Harvard's Avi Loeb shares how an interstellar object named Oumuamua could actually be a piece of technology from intelligent life outside the solar system. Jill Tarter of the SETI Institute searches for extraterrestrial life.

In Auschwitz, twenty-five Jewish slaves used their sewing skills to survive the Holocaust. The Upper Tailoring Studio, run by the commandant's wife, Hedwig Höss, and a prisoner, Marta Fuchs, was created to design, cut, and sew popular fashions for the Nazi elite. But it was also the means of saving Jewish women from the gas chambers. Guest: Lucy Adlington, author of "The Dressmakers of Auschwitz: The True Story of the Women Who Sewed to Survive"

When widespread disaster strikes, survivors lose not just their homes and belongings, they also can lose their "lifescape": their relationships with their neighbors, the places they frequent daily, their support systems. Meet some survivors from around the world who have held on to their lifescapes with creativity and tenacity. From out of the rubble, stories of inspiration and hope. Guests: Lucy Easthope, author of "When the Dust Settles: Stories of Love, Loss and Hope from an Expert in Disaster" Marc Mattox, Public Works Director and Town Engineer for the City of Paradise, CA Jeff Marcus, retired principal and former special teams football coach at Paradise High School Rick Printz, retired head football coach from Paradise High School Josh Alvies, former player and current JV football coach at Paradise High School

Tony Rinaudo arrived in Africa optimistic that his tree-planting efforts would reverse the damages of deforestation and drought. His efforts failed abysmally, but one day he stumbled on a solution that had been right at his feet the whole time. His new methods have led to the regeneration of more than 200 million trees in Niger alone. Guest: Tony Rinaudo, author of "The Forest Underground: Hope for a Planet in Crisis" and Principal Climate Action Advisor for World Vision International

One day in 1901, a young farmer from Croatia set out on a walk. Decades later, he was still walking, had traversed six continents, and had stood face-to-face with the most famous people of the age. His mammoth autograph book, lost to history for nearly a century, has resurfaced to tell the tale of Joseph Mikulec and his eccentric quest. Guests: Rebecca Rego Barry, author of "Rare Books Uncovered: True Stories of Fantastic Finds in Unlikely Places" and editor of Fine Books & Collections magazine. She wrote about Mikulec's odyssey for "Smithsonian Magazine." Nathan Raab, rare book collector, Philadelphia, PA