The irresistible, ever-curious, and always bestselling Mary Roach returns with a new adventure into the invisible realm that people carry around inside. America’s funniest science writer takes us down the hatch on an unforgettable tour.

The alimentary canal is classic Mary Roach terrain: the questions explored in Gulp are as taboo, in their way, as the cadavers in Stiff and every bit as surreal as the universe of zero gravity explored in Packing for Mars.

Why is crunchy food so appealing? Why is it so hard to find words for flavors and smells? Why doesn’t the stomach digest itself? How much can you eat before your stomach bursts? Can constipation kill you? Did it kill Elvis? In Gulp, we meet scientists who tackle the questions no one else thinks of—or has the courage to ask.

We go on location to a pet-food taste-test lab, a fecal transplant, and into a live stomach to observe the fate of a meal. With Roach at our side, we travel the world, meeting murderers and mad scientists, Eskimos and exorcists (who have occasionally administered holy water rectally), rabbis and terrorists—who, it turns out, for practical reasons do not conceal bombs in their digestive tracts.

Like all of Roach’s books, Gulp is as much about human beings as it is about human bodies.

Why do we look the way we do? What does the human hand have in common with the wing of a fly? Are breasts, sweat glands, and scales connected in some way? To better understand the inner workings of our bodies and to trace the origins of many of today's most common diseases, we have to turn to unexpected sources: worms, flies, and even fish.

Neil Shubin, a leading paleontologist and professor of anatomy who discovered Tiktaalik—the "missing link" that made headlines around the world in April 2006—tells the story of evolution by tracing the organs of the human body back millions of years, long before the first creatures walked the earth. By examining fossils and DNA, Shubin shows us that our hands actually resemble fish fins, our head is organized like that of a long-extinct jawless fish, and major parts of our genome look and function like those of worms and bacteria.

Shubin makes us see ourselves and our world in a completely new light. Your Inner Fish is science writing at its finest—enlightening, accessible, and told with irresistible enthusiasm.

High in the Canadian Rockies is a small limestone quarry formed 530 million years ago called the Burgess Shale. It holds the remains of an ancient sea where dozens of strange creatures lived—a forgotten corner of evolution preserved in awesome detail.

In this book, Stephen Jay Gould explores what the Burgess Shale tells us about evolution and the nature of history.

One of the greatest physicists of the twentieth century, Richard Feynman, possessed an unquenchable thirst for adventure and an unparalleled ability to tell the stories of his life. "What Do You Care What Other People Think?" is Feynman’s last literary legacy, prepared with his friend and fellow drummer, Ralph Leighton.

Among its many tales—some funny, others intensely moving—we meet Feynman’s first wife, Arlene, who taught him of love’s irreducible mystery as she lay dying in a hospital bed while he worked nearby on the atomic bomb at Los Alamos.

We are also given a fascinating narrative of the investigation of the space shuttle Challenger’s explosion in 1986, and we relive the moment when Feynman revealed the disaster’s cause by an elegant experiment: dropping a ring of rubber into a glass of cold water and pulling it out, misshapen.

The Double Helix is a riveting account of the discovery of the structure of DNA, the molecule of life. This groundbreaking work by Francis Crick and James Watson revolutionized the field of biochemistry.

At just 24 years old, Watson was a young scientist eager to make his mark. His candid narrative of the thrilling race against other world-class researchers to solve one of science's greatest mysteries offers a dazzlingly clear picture of a world filled with brilliant scientists, human ambitions, and intense rivalries.

Watson's humility, untainted by false modesty, shines through as he recounts his and Crick's desperate efforts to beat Linus Pauling to the Holy Grail of life sciences—the identification of the basic building block of life. Never before has a scientist been so truthful in capturing the essence of his work.