George Forster didn't begin life as a revolutionary. He was an 18th-century botanist whose life ended in Paris during the Reign of Terror. In this episode, historian Andrea Wulf tells host Marcus Smith about how, as a teenager, Forster sailed with Captain James Cook through the southern hemisphere and around Antarctica. Forster developed a transcendent love for the people he met along the way. And, as Andrea Wulf followed in his footsteps, she felt the distance of 250 years collapse on itself. George Forster grew up helping to support his family as his father’s assistant in botany and later on as a translator. When he got the chance to travel on a voyage to the southern hemisphere, he studied the wildlife and the people he met, fascinated by everything from phosphorescence to islanders' ingenious toolmaking. On his return to Europe, he brought new ideas about social equality, developed through observations of South Pacific cultures. Ultimately, though, his political activism led to his personal ruin. But to Andrea Wulf, Forster represents hope, progress, and the power of a singular mind. Guest: Andrea Wulf, historian and author of “The Traveler: One Man’s Quest for Humanity from the South Seas to Revolutionary Paris” andreawulf.com

Tim Kovar leads climbing tours high up in the canopy of massive trees. In this episode of Constant Wonder, he tells host Marcus Smith about how he used to fell trees as an arborist. But now, he's traded in his chainsaw for ropes and climbing saddles; so, instead of cutting trees down, he can take regular people high into old-growth canopies to experience unparalleled views of nature.  The trees have taught him to be more in tune with the natural world and with himself. Tim Kovar has been climbing trees since he was a kid, when he pretended to be a master tree ninja. But these days, you'll find him climbing slowly and carefully, using a system of ropes and harnesses and always asking the tree for permission first. He quit cutting trees down after felling a centuries-old tree and hearing it cry out for help. Now, he finds a sacred peace up in the treetops, and helps others to discover it as well. Guest: Tim Kovar, Master Tree Climbing Instructor treeclimbingplanet.com

Lea Korsgaard felt a tug toward the natural world and followed it, setting out to find all 64 species of butterfly in her native Denmark. What began as an impulse became a consuming quest that transformed her understanding of nature, mortality, grief, and joy. In this episode, Lea and host Marcus Smith revisit the journey: the small tortoiseshell butterfly that connected her to her mother’s story, the family members drawn into her search, and the exhilaration of finding out that maybe her quest hadn't been about butterflies at all. Their conversation explores how learning to see the natural world can open us to realities larger than ourselves—and how encounters with nature can hold grief and joy at the same time. Guest: Lea Korsgaard, author of "The Butterfly Season: What 64 Butterflies Taught Me About Nature’s Great Mysteries and the Meaning of Life"

Karl Gönner was a Nazi, and his family didn't ask a lot of questions about that time in his life. In this episode of Constant Wonder, Gönner's grandson Burkhard Bilger speaks with co-host Tennery Taylor about his search for the full story of his grandfather's past. After growing up with only a vague understanding of his grandfather's dark history, Bilger decided to search for the full truth behind his heritage. He discovered that during his grandfather's time occupying a French village, Gönner saved dozens of lives from Nazi oppression, while simultaneously leading the Hitler Youth Program. This family's history is more inspiring than they'd ever suspected. Guest: Burkhard Bilger, author of "Fatherland: A Memoir of War, Conscience, and Family Secrets" and staff writer at "The New Yorker" Originally aired on August 8, 2023 Chapters: (0:00) Meet Nazi Karl Gönner through his grandson Burkhard Bilger (9:40) Karl Gönner as a teacher (14:20) A Nazi in occupied France (23:08) Discovering the "reasonable" Nazi (31:14) Gönner's daughter and her struggle with his history (38:10) The End of WWII (48:12) Serendipitous inspiration in classified archives

As a teenager, Walt McLaughlin told his parents he'd been talking to God in the woods, and he ended up in a psychiatric ward on Thorazine. Years later a philosophy degree had done nothing to assuage his existential anxiety, so he hitchhiked west — and eventually flew alone into Alaska's Endicott River Wilderness with a .44, no radio, and two-and-a-half-weeks worth of food. On this episode of Constant Wonder, the writer and erstwhile hiking guide tells host Marcus Smith how a death wish that had shadowed him since adolescence finally broke — on a rain-soaked escarpment, with a raven croaking at him from a branch — and how he came to accept that the world is harsh yet beautiful. Walt McLaughlin lives in northern Vermont, close to the New England woods and wilds he loves. There he's proprietor of the small indie press Wood Thrush Books, online at woodthrushbooks.com. This episode includes a first-person account of depression and a suicide attempt. Guest: Walt McLaughlin, publisher and author, “Cultivating the Wildness Within”; “Arguing with the Wind: A Journey into the Alaskan Wilderness”; and “Confronting the Unknowable: Essays on God, Nature and Being Human”

What if protecting humans is the key to protecting wildlife? In this episode, Dr. Gladys Kalema-Zikusoka tells host Marcus Smith how people living near African nature preserves can unknowingly pass illnesses to nearby mountain gorillas—and how she's working with local communities to shield these endangered animals from disease and habitat loss. As Uganda's first wildlife veterinarian, Kalema-Zikusoka pioneered the use of "One Health" in gorilla conservation—an approach that treats human, animal, and environmental health as interconnected, rather than separate concerns. By investing in the health and economic security of nearby communities, she keeps gorillas healthy too. The payoff is a thriving gorilla tourism industry that benefits the entire country. Guest: Dr. Gladys Kalema-Zikusoka, founder and CEO of Conservation Through Public Health and author of "Walking with Gorillas: The Journey of an African Wildlife Vet" Chapters: (0:00) Meet Dr. Gladys Kalema-Zikusoka (8:28) A Lonely Childhood (17:29) To Become a Wildlife Vet (22:46) Bwindi Impenetrable Forest (32:44) What is One Health? (46:27) How to End Poaching Photo credit: Jo-Anne McArthur / #unboundproject / We Animals Media Originally aired May 24, 2023 Note: Dr. Gladys Kalema-Zikusoka's mother, Canon Hon . Rhoda Kalema, passed away in 2025.

Flowers, believe it or not, are nature's greatest revolutionaries. In this episode of Constant Wonder, biologist David George Haskell and host Marcus Smith discuss how flowers turned enemies into allies and used ultra-precise adaptations to survive an intensely competitive natural world. By exploring the floral connections that draw him closer to his mother and great-great-grandfather, David also examines how flowers have changed in just a few short decades. He makes the case for following a single bloom's growth and decay over the course of several months, and describes the benefits of keeping a floral diary—an easy way for anyone to become more attentive to the subtle turning of the seasons. Guest: David George Haskell, author of "How Flowers Made Our World: The Story of Nature's Revolutionaries" Chapters: (0:00) Meet David George Haskell (7:21) Searching for orchids with his mother (13:52) Glimpses of himself in his great-great-grandfather (21:56) Why are flowers revolutionaries? (31:05) Balancing cooperation and conflict (34:59) Tracking a magnolia bloom (44:42) David's floral diary

They are like street musicians, busking with words instead of instruments. Typewriter poets Kathleen Rooney and Allison Fragakis share with Constant Wonder's Tennery Taylor how they write poems-on-demand for complete strangers. Whether at a farmer's market, tucked between the stacks at a library, or as entertainment at a wedding, typewriter poets surprise customers with a keepsake that reflects unexpected insight into a stranger's life. (Or maybe it's a poem about a burrito! These poems don't have to be serious.) Kathleen Rooney and Allison Fragakis share their creativity and love of community through impromptu poetry sessions on typewriters. Guests: Kathleen Rooney, co-founder of "Poems While You Wait"; English professor at DePaul University; author of "Man Overboard!" and other books https://kathleenrooney.com/ Allison Fragakis, songwriter, author, artist, and poet. Her album "Pass the Dream" is available August 21, 2026 https://www.writingallison.com/

Jeremy Jones has loved exploring the Blue Ridge Mountains since childhood, and despite his world travels, his identity as a "mountain person" always brought him home. His family has lived in Henderson County for five generations—so when Hurricane Helene sent the river rising toward his old farmhouse, it threatened more than a house. In this episode of Constant Wonder, Jeremy joins host Marcus Smith to share what it took to rebuild, and how the experience reconnected him to his neighbors, his family, and a history in these mountains that runs deeper than he'd realized. Guest: Jeremy Jones is a professor of English Studies at Western Carolina University, and the author of books "Cipher: Decoding My Ancestor’s Scandalous Secret Diaries" (Blair, 2025) and "Bearwallow: A Personal History of a Mountain Homeland" (Blair, 2014).

Snakes. Scorpions. Sharks. From a young age, Rachel Graham has always been interested in marginalized, "scary" animals. In this episode of Constant Wonder, she and host Marcus Smith discuss how she embarked on her quest to change people’s mindsets about sharks—fascinating and threatened creatures that regularly fill her with awe. From being surrounded by a real-life sharknado to swimming alongside curious whale sharks, Rachel has had many peaceful, once-in-a-lifetime encounters with these megafauna.  As part of her work with the non-profit conservation organization MarAlliance, she partners with local fishermen and coastal communities to protect vulnerable marine wildlife. Guest: Rachel Graham, Founder and Executive Director of MarAlliance Chapters: (0:00) A real-life sharknado (9:43) Mr. Facey the whale shark (18:16) The dangers of overfishing (26:10) Childhood nature adventures (34:47) Caring for hammerheads (45:03) How old can sharks get? Originally aired November 9, 2022

Gaelynn Lea plays the violin like a cello — a technique she discovered almost by accident, one that would eventually carry her from a small-town orchestra to NPR's Tiny Desk Concert and, later, to composing the original music for Broadway's revival of Macbeth, starring Daniel Craig and Ruth Negga. In this episode of Constant Wonder, she talks with Marcus Smith about her unconventional technique, the unexpected opportunities it opened up, and how her songwriting continues to evolve. Gaelynn Lea was born into a family of artists, with musical parents and an early start in youth theater. But everything changed in elementary school, when an orchestra teacher encouraged her to try holding the violin like a cello — a small discovery that would shape the rest of her career. Guest: Gaelynn Lea is a violinist, songwriter, composer, disability advocate, and author of "It Wasn't Meant to Be Perfect: A Memoir." Photo credits to Mike Madison