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Upon seeing an adorable Koala sitting on an eucalyptus branch in Australia, few would expect the beloved marsupial to emit a booming bellow to alert potential mates or rivals of its presence. But this powerful roar is just one of koalas’ many surprises, which delight and astonish in Australian biologist Danielle Clode’s new book, “Koala: A Life in the Trees.” Clode explores the enigmatic koala’s 24 million years-long saga of evolutionary adaptations, conservation triumphs, and endangerment catastrophes, and the prospects for their future following the 2019 bushfires that devastated Australia’s koala populations. We speak with Clode about the ancient ancestors, ecology, evolving relationship with humans, and uncertain fate of Australia’s bellowing marsupial.

Most books on puppies are dog-improvement manuals, guiding readers ‘How to Raise the Perfect Dog’ or how to achieve ‘Perfect Puppy in 7 Days.’ Alexandra Horowitz’s profound and totally delightful new book is not that type of book. It’s an unprecedented look at the complex, chaotic, fascinating, and often hilarious journeys of puppies becoming themselves. “Instead of following an instruction manual for a puppy, I wanted to follow the puppy,” she writes. The Swiss psychologist Jean Piaget famously watched his own kids grow into adults as both a parent and a scientist. His observations of his kids inspired and served as the basis for many of his theories about how young human minds develop. Horowitz, a world-renowned expert in dog cognition, set out to do the same for her spectacularly eye-browed, exquisitely sensitive, and rambunctious new family member, Quiddity. In ‘The Year of the Puppy,’ Horowitz follows Quid from her birthday through the puppy equivalents of infancy, childhood, and adolescence. We spoke with Horowitz about the science of early dog development, how Quid is enjoying her big literary debut, and what we have to learn from trying to understand how puppies encounter and make meaning of the world.

Grazing peacefully through shallow waterways, the Florida manatee is one of the state’s most beloved creatures. Due to a multitude of compounding, human-caused crises, the last couple years have been some of the deadliest on record for manatees. Years of worsening water quality from Florida’s unfettered agricultural pollution and real estate development have resulted in increased toxic algae blooms that block sunlight from reaching the seagrass meadows upon which the manatees depend. In 2021, Florida’s manatees died in massive numbers, with a record 1,100 manatees – more than 12 percent of the state’s total manatee population – perishing. Most died by starvation. In this episode, we speak with aquatic biologist Patrick Rose, the ‘MVP of manatee protection,’ who has worked for more than four decades to propel manatees to public prominence and to translate manatees’ popularity into enforced protections for these animals and their habitat. Rose, the executive director of the Save the Manatee Club, tells us about the heartbreaking cost to these gentle giants of human derelictions, the critical importance of cleaning up Florida’s waterways, and what it is about manatees that has inspired Rose and countless others to fight tirelessly for their future.

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Amid the cataclysms of the Anthropocene, an era defined by humans’ attempts to control the natural world, it’s easy to forget that we remain as subject as ever to the ecological laws that govern living things. Like the laws of physics, paying attention to our planet’s biological laws empowers us to understand how the world works and to make predictions about the outcomes of our actions. In his new book, A Natural History of the Future, ecologist Rob Dunn warns that continuing to ignore these laws will cause us to fail again and again in our attempts to build a sustainable future for our species. In this interview, we speak with Dr. Dunn about how across life big and small, remote and within our own bodies, these immutable laws of ecology, evolution, and biogeography will shape our future; what the trajectory of life could look like in our absence; and about the marvelous unknowns still to be discovered around and within us.

In 1995, the U.S. government took unprecedented actions to restore the wolf population of Yellowstone National Park, which it had brutally destroyed seventy years prior. More than thirty wolves from multiple packs were captured in Canada, transported to the park, and released in a grand experiment that would become the most successful wildlife reintroduction effort in history. Our guest, the legendary wolf expert Rick McIntyre, has dedicated his life to those wolves. For the past 26 years, he has observed the park’s wolves nearly every single day, accumulating more than 100,000 sightings. After retiring from the park service, McIntyre – who still watches the wolves daily – penned a gripping series of biographies of Yellowstone’s greatest wolf leaders: Wolf 08, one of the first reintroduced wolves who grew from a runt into a powerful pack leader; his adopted and brave son, Wolf 21, known for his long and successful reign as king of the park’s Druid Peak pack, his deep devotion to his mate, and his unusual benevolence to his defeated rivals; and 21’s nephew, Wolf 302, who started life as an irresponsible Casanova who stole food from pups and slept during battles, but transformed his character and died as a heroic father. In this episode, McIntyre describes the wolves’ unique personalities, the packs’ dynastic dramas, and the exuberant joy that he’s seen through his spotting scope, and explains why federal action is urgently needed to protect these wolves, who are at risk of being massacred once again due to draconian new state laws.