Yellowstone National Park was once home to an abundance of wild wolves - but park rangers killed the last of their kind in the 1920s. Decades later, the rangers brought them back, with the first wolves arriving from Canada in 1995. This is the incredible true story of one of those wolves.

America's Great Plains once possessed one of the grandest wildlife spectacles of the world, equaled only by such places as the Serengeti, the Masai Mara, or the veld of South Africa. Pronghorn antelope, gray wolves, bison, coyotes, wild horses, and grizzly bears: less than 200 years ago these creatures existed in such abundance that John James Audubon was moved to write "it is impossible to describe or even conceive the vast multitudes of these animals".

North America's biggest cat was once killed for bounty dollars, slaughtered with impunity and driven toward extinction. But today's cat of intrigue, despite our lingering fears and misconceptions, has returned to much of its native range in the western United States and gained respect as a predator integral and necessary to wild ecosystems. This turnaround was triggered by one man: Maurice Hornocker. Cougars on the Cliff recounts the early years of his research when he tracked lions following a dog's nose and footprints in the snow—before telemetry was available.

During a time when most wild animals are experiencing decline in the face of development and climate change, the intrepid mountain lion - also known as a puma, a cougar, and by many other names - has experienced reinvigoration as well as expansion of territory. What makes this cat, the fourth carnivore in the food chain - just ahead of humans - so resilient and resourceful? And what can conservationists and wild life managers learn from them about the web of biodiversity that is in desperate need of protection?

Since its inception, however, America’s public land system has been embroiled in controversy - caught in the push and pull between the desire to develop the valuable resources the land holds or conserve them. Alarmed by rising tensions over the use of these lands, hunter, angler, and outdoor enthusiast Mark Kenyon set out to explore the spaces involved in this heated debate, and learn firsthand how they came to be and what their future might hold.

In Wild Men, Wild Alaska professional hunting and fishing guide and outfitter Rocky McElveen tells the stories of his own adventures as well as those of some of his well-known clients. The book takes listeners directly into the Alaskan bush, and shares the intense challenges of a majestic wilderness that pushes a man to his limits.

Tucked away in Siberia, there are furry, four-legged creatures with wagging tails and floppy ears that are as docile and friendly as any lapdog. But, despite appearances, these are not dogs - they are foxes. They are the result of the most astonishing experiment in breeding ever undertaken - imagine speeding up thousands of years of evolution into a few decades. In 1959, biologists Dmitri Belyaev and Lyudmila Trut set out to do just that, by starting with a few dozen silver foxes from fox farms in the USSR and attempting to recreate the evolution of wolves into dogs in real time.

Author Kevin Grange—former paramedic and park ranger at Yellowstone and Grand Teton—comes face-to-face with North America’s most fearsome predator, Ursus Arctos. His quest takes him from his home in the Tetons to an eerie, mist-shrouded island of gigantic bruins; from the Bear Center at Washington State University—where scientists believe the secrets of hibernation might help treat diabetes, heart disease, and obesity in humans—to the dark underbelly of for-profit wildlife parks, illegal animal trade and black markets hawking bear bile.

For six years Jim and Jamie Dutcher lived intimately with a pack of wolves, gaining their trust as no one has before. In this book the Dutchers reflect on the virtues they observed in wolf society and behavior. Each chapter exemplifies a principle, such as kindness, teamwork, playfulness, respect, curiosity, and compassion. Their heartfelt stories combine into a thought-provoking meditation on the values shared between the human and the animal world.

In MeatEater’s Campfire Stories: Discoveries, Revelations & Near Misses, a collection of outdoorsmen share remarkable tales of life-altering moments. From a macabre discovery in the Idaho mountains that closed the book on a mystery spanning more than 50 years to an Ice Age archaeological find in remote Alaska, these stories take listeners on an immersive journey and provide intimate glimpses into a way of life that is slipping away.

The chilling tome that launched an entire genre of books about the often gruesome but always tragic ways people have died in our national parks, this updated edition of the classic includes calamities in Yellowstone from the past sixteen years, including the infamous grizzly bear attacks in the summer of 2011 as well as a fatal hot springs accident in 2000. In these accounts, written with sensitivity as cautionary tales about what to do and what not to do in one of our wildest national parks, Whittlesey recounts deaths ranging from tragedy to folly.

How do trees live? Do they feel pain or have awareness of their surroundings? Research is now suggesting trees are capable of much more than we have ever known. In The Hidden Life of Trees, forester Peter Wohlleben puts groundbreaking scientific discoveries into a language everyone can relate to.

In her enchanting memoir, Dr. Gladys Kalema-Zikusoka, Uganda’s first wildlife veterinarian, tells the remarkable story from her animal-loving childhood to her career protecting endangered mountain gorillas and other wild animals. In the face of discrimination and a male dominated world, one woman’s passion and determination to build a brighter future for the local wildlife and human community offers inspiration and insights into what is truly possible for our planet when we come together.

Sue Tidwell lived in awe of Africa’s extraordinary wildlife. After years spent appreciating the animals in her imagination, the tenderhearted American hated the idea of joining her husband on a big game hunting safari. And getting attacked by blood-sucking tsetse flies the moment she stepped off the plane gave no hint of the mind-blowing change of perspective in her future. With her initial animosity turning into curiosity as they breathlessly tracked dangerous beasts, Sue formed a surprising bond with their young female government-assigned game scout.

It’s December 1997, and a man-eating tiger is on the prowl outside a remote village in Russia’s Far East. The tiger isn’t just killing people, it’s annihilating them, and a team of men and their dogs must hunt it on foot through the forest in the brutal cold. As the trackers sift through the gruesome remains of the victims, they discover that these attacks aren’t random: The tiger is apparently engaged in a vendetta. Injured, starving, and extremely dangerous, the tiger must be found before it strikes again.

My Big TOE: Awakening, written by a nuclear physicist in the language of contemporary culture, unifies science and philosophy, physics and metaphysics, mind and matter, purpose and meaning, the normal and the paranormal. The entirety of human experience (mind, body, and spirit) including both our objective and subjective worlds is brought together under one seamless scientific understanding.

Chemistry and Our Universe: How It All Works is your in-depth introduction to this vital field, taught through 60 engaging half-hour lectures that are suitable for any background or none at all. Covering a year’s worth of introductory general chemistry at the college level, plus intriguing topics that are rarely discussed in the classroom, this amazingly comprehensive course requires nothing more advanced than high-school math. Your guide is Professor Ron B. Davis, Jr., a research chemist and award-winning teacher at Georgetown University.

Richard Dawkins' brilliant reformulation of the theory of natural selection has the rare distinction of having provoked as much excitement and interest outside the scientific community as within it. His theories have helped change the whole nature of the study of social biology, and have forced thousands to rethink their beliefs about life.

How the Earth Works takes you on an astonishing journey through time and space. In 48 lectures, you will look at what went into making our planet - from the big bang, to the formation of the solar system, to the subsequent evolution of Earth.

We are in the midst of a global mental health crisis, and mental illnesses are on the rise. But what causes mental illness? And why are mental health problems so hard to treat? Drawing on decades of research, Harvard psychiatrist Dr. Chris Palmer outlines a revolutionary new understanding that for the first time unites our existing knowledge about mental illness within a single framework: mental disorders are metabolic disorders of the brain. Brain Energy will transform the field of mental health, and the lives of countless people around the world.

Astrophysicist Neil deGrasse Tyson has attracted one of the world’s largest online followings with his fascinating, widely accessible insights into science and our universe. Now, Tyson invites us to go behind the scenes of his public fame by unveiling his candid correspondence with people across the globe who have sought him out in search of answers. In this hand-picked collection of 100 letters, Tyson draws upon cosmic perspectives to address a vast array of questions about science, faith, philosophy, life, and of course, Pluto.

Hilarious, fascinating, and a roller coaster of dizzying, historical what-ifs, Napoleon's Hemorrhoids is a potpourri for serious historians and casual history buffs. In one of Phil Mason's many revelations, you'll learn that Communist jets were two minutes away from opening fire on American planes during the Cuban missile crisis, when they had to turn back as they were running out of fuel. You'll discover that before the Battle of Waterloo, Napoleon's painful hemorrhoids prevented him from mounting his horse to survey the battlefield.

Dr. Catherine Kleier invites us to open our eyes to the phenomenal world of plant life and to the process she calls “Natura Revelata”, the joy of celebrating and learning from the secrets of nature. As Dr. Kleier shares her knowledge with contagious excitement for her subject, she emphasizes the middle ground: Instead of focusing on cell microbiology or the study of ecosystems and habitats, she stresses the basic biology, function, and the amazing adaptations of the plants we see all around us.

In this illuminating audiobook, Tyson and coauthor James Trefil, a renowned physicist and science popularizer, take on the big questions that humanity has been posing for millennia - How did life begin? What is our place in the universe? Are we alone? - and provide answers based on the most current data, observations, and theories.

At the end of his career, Albert Einstein was pursuing a dream far more ambitious than the theory of relativity. He was trying to find an equation that explained all physical reality - a theory of everything. Experimental physicist and award-winning educator Dr. Don Lincoln takes you on this exciting journey in The Theory of Everything: The Quest to Explain All Reality. Suitable for the intellectually curious at all levels and assuming no background beyond basic high-school math, these 24 half-hour lectures cover recent developments at the forefront of particle physics and cosmology.

In the past two decades, our understanding of the navigational and physiological feats that enable birds to cross immense oceans, fly above the highest mountains, or remain in unbroken flight for months at a stretch has exploded. What we've learned of these key migrations is nothing short of extraordinary. This breathtaking work of nature writing also introduces listeners to those scientists, researchers, and bird lovers trying to preserve global migratory patterns in the face of climate change and other environmental challenges.

When Dr. Richard Greenberg, accompanied by his wife and three children, set out for a scenic day hike on the Nā Pali Coast of Kaua'i, he had little idea that the dream-like setting would soon be the backdrop of a living nightmare. With an unforeseen change in the weather, Dr. Greenberg and his family soon found themselves fighting for their lives. In this harrowing retelling of the unexpected events of that day and the journey that followed, Dr. Greenberg shares a miraculous story of disaster and rescue, of strength and faith, and of grief and recovery.

It’s December 1997, and a man-eating tiger is on the prowl outside a remote village in Russia’s Far East. The tiger isn’t just killing people, it’s annihilating them, and a team of men and their dogs must hunt it on foot through the forest in the brutal cold. As the trackers sift through the gruesome remains of the victims, they discover that these attacks aren’t random: The tiger is apparently engaged in a vendetta. Injured, starving, and extremely dangerous, the tiger must be found before it strikes again.

Coyote America is both an environmental and a deep natural history of the coyote. It traces both the five-million-year-long biological story of an animal that has become the "wolf" in our backyards and its cultural evolution from a preeminent spot in Native American religions to the hapless foil of the Road Runner. A deeply American tale, the story of the coyote in the American West and beyond is a sort of Manifest Destiny in reverse.

Tucked away in Siberia, there are furry, four-legged creatures with wagging tails and floppy ears that are as docile and friendly as any lapdog. But, despite appearances, these are not dogs - they are foxes. They are the result of the most astonishing experiment in breeding ever undertaken - imagine speeding up thousands of years of evolution into a few decades. In 1959, biologists Dmitri Belyaev and Lyudmila Trut set out to do just that, by starting with a few dozen silver foxes from fox farms in the USSR and attempting to recreate the evolution of wolves into dogs in real time.

In The Price of Power, award-winning journalist Michael Tackett pulls back the curtain on one of the most influential figures to ever set foot in the American Senate, offering you an intimate, personal view of his life and career. Drawing on thousands of pages of archival materials, letters, and more than 100 interviews with associates, colleagues, and McConnell himself, Tackett pieces together the story of McConnell’s early life, his formative battle with polio as a young child, and details his forty-plus-year career as one of the Senate’s most impactful leaders.

The emergence of strange new diseases is a frightening problem that seems to be getting worse. In this age of speedy travel, it threatens a worldwide pandemic. We hear news reports of Ebola, SARS, AIDS, and something called Hendra killing horses and people in Australia - but those reports miss the big truth that such phenomena are part of a single pattern. The bugs that transmit these diseases share one thing: they originate in wild animals and pass to humans by a process called spillover. David Quammen tracks this subject around the world.

“Even now, nearly a century after her death, Marie Curie remains the only female scientist most people can name,” writes Dava Sobel at the opening of her shining portrait of the sole Nobel laureate decorated in two separate fields of science—Physics in 1903 with her husband Pierre and Chemistry by herself in 1911. And yet, Sobel makes clear, as brilliant and creative as she was in the laboratory, Marie Curie was equally passionate outside it.

This book is the product of The Earhart Project, a thirty-four-year investigation of the Earhart tragedy by The International Group for Historic Aircraft Recovery. TIGHAR investigators had no agenda. They were not out to advocate, excuse, honor, or impugn. They saw the Earhart disappearance as an aviation accident and reasoned the answer to its cause and outcome should be discoverable if they could find, assemble, and analyze the relevant data.

In Return to the Sky, Tina Morris, one of the first women to engage in a raptor reintroduction program, shares her remarkable story that is as much about the human spirit as it is about birds of prey.

Yellowstone National Park was once home to an abundance of wild wolves - but park rangers killed the last of their kind in the 1920s. Decades later, the rangers brought them back, with the first wolves arriving from Canada in 1995. This is the incredible true story of one of those wolves.

An enthralling account of a modern voyage of discovery as we meet the clever, social birds of prey called caracaras, which puzzled Darwin, fascinate modern-day falconers, and carry secrets of our planet's deep past in their family history.

The stomach is notoriously outspoken. It growls, gurgles, and grumbles while other organs remain silent. For centuries humans have puzzled over this rowdy organ, deliberating on the extent of its influence over cognition, mental wellbeing, and emotions, and wondering how the gut became so central to our sense of self. Traveling from ancient Greece to Victorian England, eighteenth-century France to modern America, historian Elsa Richardson leads us on a tour of the gut, exploring all the ways that we have imagined, theorized, and probed the mysteries of the gastroenterological system.

One afternoon many years ago, James Rebanks met an old woman on a remote Norwegian island. She lived and worked alone on a tiny rocky outcrop, caring for wild Eider ducks and gathering their down. Hers was a centuries-old trade that had once made men and women rich but had long been in decline. Still, somehow, she seemed to be hanging on. Back at home, Rebanks couldn’t stop thinking about the woman on the rocks. She was fierce and otherworldly—and yet strangely familiar.

Are we alone in the universe? It's a fundamental question for Earth-dwelling humankind. Are there other worlds like ours, out there somewhere? In Hidden in the Heavens, Jason Steffen, a former scientist on NASA's Kepler mission, describes how that mission searched for planets orbiting Sun-like stars—especially Earth-like planets circulating in Earth-like orbits.