Thousands of people live in the subway, railroad, and sewage tunnels that form the bowels of New York City. This audiobook is about them, the so-called mole people, living alone and in communities, in subway tunnels, and below subway platforms. It is about how and why people move underground, who they are, and what they have to say about their lives and the "topside" world they've left behind.

Comet begins with a breathtaking journey through space astride a comet. Pulitzer Prize-winning astronomer Carl Sagan, author of Cosmos and Contact, and writer Ann Druyan explore the origin, nature, and future of comets, and the exotic myths and portents attached to them. The authors show how comets have spurred some of the great discoveries in the history of science and raise intriguing questions about these brilliant visitors from the interstellar dark.

Were the fates of the dinosaurs and the origins of humans tied to the wanderings of a comet?

In this scientifically informed account of the changes occurring in the world over the last century, award-winning broadcaster and natural historian Sir David Attenborough shares a lifetime of wisdom and a hopeful vision for the future. 

The Skeptics' Guide to the Universe is your map through this maze of modern life. Here Dr. Steven Novella and friends will explain the tenets of skeptical thinking and debunk some of the biggest scientific myths, fallacies, and conspiracy theories - from anti-vaccines to homeopathy, UFO sightings to N-rays. You'll learn the difference between science and pseudoscience, essential critical thinking skills, ways to discuss conspiracy theories with that crazy co-worker of yours, and how to combat sloppy reasoning, bad arguments, and superstitious thinking.

A definitive history of mescaline that explores its mind-altering effects across cultures, from ancient America to Western modernity. Mescaline became a popular sensation in the mid-20th century through Aldous Huxley's The Doors of Perception, after which the word "psychedelic" was coined to describe it. Its story, however, extends deep into prehistory: The earliest Andean cultures depicted mescaline-containing cacti in their temples.

Civilization was born 8,000 years ago, between the floodplains of the Tigris and Euphrates rivers, when migrants from the surrounding mountains and deserts began to create increasingly sophisticated urban societies. In the cities that they built, half of human history took place. In Babylon, Paul Kriwaczek tells the story of Mesopotamia from the earliest settlements seven thousand years ago to the eclipse of Babylon in the sixth century BCE. Bringing the people of this land to life in vibrant detail, the author chronicles the rise and fall of power during this period.

In Dinosaurs Rediscovered, leading paleontologist Michael J. Benton gathers together all the latest paleontological evidence, tracing the transformation of dinosaur study from its roots in antiquated natural history to an indisputably scientific field. Among other things, the book explores how dinosaur remains are found and excavated, and especially how paleontologists read the details of dinosaurs' lives from their fossils - their colors, their growth, and even whether we will ever be able to bring them back to life. 

In Joyful, designer Ingrid Fetell Lee explores how the seemingly mundane spaces and objects we interact with every day have surprising and powerful effects on our mood. Drawing on insights from neuroscience and psychology, she explains why one setting makes us feel anxious or competitive while another fosters acceptance and delight - and, most importantly, she reveals how we can harness the power of our surroundings to live fuller, healthier, and truly joyful lives.

Providing a cover for our delicate and intricate bodies, the skin is our largest and fastest-growing organ. We see it, touch it, and live in it every day. It is a habitat for a mesmerizingly complex world of micro-organisms and physical functions that are vital to our health and our survival. It is also a waste removal plant, a warning system for underlying disease and a dynamic immune barrier to infection. One of the first things people see about us, skin is crucial to our sense of identity, providing us with social significance and psychological meaning. 

The cohost of the popular NPR podcast Planet Money provides a well-researched, entertaining, somewhat irreverent look at how money is a made-up thing that has evolved over time to suit humanity's changing needs.  

These stories from Quanta Magazine map the routes of mathematical exploration, showing listeners how cutting-edge research is done, while illuminating the productive tension between conjecture and proof, theory and intuition. Listeners of The Prime Number Conspiracy are headed on "breathtaking intellectual journeys to the bleeding edge of discovery strapped to the narrative rocket of humanity's never-ending pursuit of knowledge," says Quanta editor-in-chief Thomas Lin. 

In his retelling of a Chinese history stretching back 5,000 years, author and China-expert Jonathan Clements focuses on the human stories which led to the powerful transformations in Chinese society - from the unification of China under its first emperor, Qinshi Huangdi, to the Mongol invasion under Genghis Khan and the consolidation of Communist rule under Mao Zedong. Clements even brings listeners through to the present day, outlining China's economic renaissance under Deng Xiaoping and Xi Jinping.

In an engaging blend of science and story, Robinson describes how and when we transformed the food in the produce aisles. Wild apples, for example, have from three to 100 times more antioxidants than Galas and Honeycrisps. How do we begin to recoup the losses of essential nutrients? By "eating on the wild side" - choosing present-day fruits and vegetables that come closest to the nutritional bounty of their wild ancestors. Robinson explains that many of these jewels of nutrition are hiding in plain sight in our supermarkets, farmers markets, and U-pick orchards.

Debilitating brain disorders are on the rise - from children diagnosed with autism and ADHD to adults developing dementia at younger ages than ever before. But a medical revolution is underway that can solve this problem: Astonishing new research is revealing that the health of your brain is, to an extraordinary degree, dictated by the state of your microbiome - the vast population of organisms that live in your body and outnumber your own cells 10 to one.

Rocket science is often celebrated as the ultimate triumph of technology. But it's not. Rather, it's the apex of a certain thought process - a way to imagine the unimaginable and solve the unsolvable. It's the same thought process that enabled Neil Armstrong to take his giant leap for mankind, that allows spacecraft to travel millions of miles through outer space and land on a precise spot, and that brings us closer to colonizing other planets.