When Joshua Plotnik was a kid, he wanted to become a veterinarian and day dreamed of a future caring for animals large and small. By the time he got to college, he eagerly worked with every type of vet he could think of, from small animal vets to large animal horse veterinarians. On a summer break from his undergraduate studies at Cornell University, he interned as a zookeeper at the Central Park Zoo, and a mentor there encouraged him to reach out to the internationally-acclaimed primatologist Dr. Franz de Waal, known for his research on cooperation in primates. When the young student approached Dr. de Waal to ask if he might take him on as a PhD candidate, Dr. de Waal extended an invitation — the chance of a lifetime. Dr. Plotnik started researching chimpanzee behavior — where a lot of psychology researchers land, he says.

But Dr. Plotnik's interests soon expanded to question how those similarities evolve across these different species, if it's not due to a common ancestor?

With that fascination driving his work, Dr. Plotnik soon asked  Dr. de Waal for his support setting up a field site where he could immerse himself in researching the behavioral flexibility of one the largest animals he'd worked with yet: Elephants. And so, for the last two decades, Dr. Plotnik's research has focused on wild and captive elephants primarily located in Thailand. Now an associate professor of psychology and the director of the Comparative Cognition for Conservation Lab at Hunter College, City University of New York, he's currently wrapping up a years-long study about elephant intelligence.

• Read the transcript of this episode
• Subscribe to Stories of Impact wherever you listen to podcasts
• Find us on Facebook, Twitter, Instagram and YouTube
• Share your comments, questions and suggestions at info@storiesofimpact.org
• Supported by Templeton World Charity Foundation

Are animals capable of feeling joy? How do we know? What is joy? Dr. Erica Cartmill wants to find out. She's the Indiana University professor of cognitive science, animal behavior, and anthropology that long-time listeners to Stories of Impact will recognize from conversations we've had in the past about her studies of diverse intelligences and humor in apes. Today, we'll learn about one of her latest collaborative projects — a first of its kind multidisciplinary study: Joyful by Nature, on the evolution and the function of joy in animals. She's joined in conversation by Dr. Colin Allen, Professor of Philosophy at University of California Santa Barbara and Dr. Heidi Lyn, Joan M. Sinnott Professor in Psychology and Marine Sciences at the University of South Alabama. This team of expert researchers shares why it's both timely and important to move the science of animal emotion forward.

• Read the transcript of this episode
• Subscribe to Stories of Impact wherever you listen to podcasts
• Find us on Facebook, Twitter, Instagram and YouTube
• Share your comments, questions and suggestions at info@storiesofimpact.org
• Supported by Templeton World Charity Foundation

In remembrance of Jane Goodall (4/3/34 - 10/1/25), we're bringing back our conversation featuring her life and legacy.

Luminary Dr. Jane Goodall for decades made significant contributions to not only the scientific world, but arguably, to the entire planet.

When 26-year-old British-born Jane Goodall began field studies of primates in Tanzania in July 1960, she was the first researcher to observe chimpanzees in the wild, and she remains the world's foremost expert on chimpanzees. Her rigorous and creative approach quickly gained the attention of the National Geographic Society, which awarded her first grant, and has passionately championed her work in the decades since. Despite never getting a college degree, Dr. Goodall was accepted at Cambridge University, earned her PhD in ethology in 1966, and spent decades in the Gombe Stream National Park studying chimpanzee communities, eventually becoming the only human to ever be accepted into a chimpanzee society.

In her 90 years, Dr. Goodall was a legendary conservationist, galvanizing educator, UN Messenger of Peace, and an inspiring writer and public speaker. Her curiosity, empathy, wisdom, protective heart, and unshakeable hope reflect the best of humanity, and even though her conversation was short, you'll hear all of those exemplary characteristics embodied in her voice and story.

• Read the transcript of this episode
• Subscribe to Stories of Impact wherever you listen to podcasts
• Find us on Facebook, Twitter, Instagram and YouTube
• Share your comments, questions and suggestions at info@storiesofimpact.org
• Supported by Templeton World Charity Foundation