99% Invisible is a big-ideas podcast about small-seeming things, revealing stories baked into the buildings we inhabit, the streets we drive, and the sidewalks we traverse. The show celebrates design and architecture in all of its functional glory and accidental absurdity, with intriguing tales of both designers and the people impacted by their designs.

At the dawn of the 20th century, humanity was facing global disaster. Mass starvation, long predicted for the fast-growing population, was about to become a reality. A call went out to the worlds scientists to find a solution. This is the story of the two enormously gifted, fatally flawed men who found it: the brilliant, self-important Fritz Haber and the reclusive, alcoholic Carl Bosch. Together they discovered a way to make bread out of air, built city-sized factories, controlled world markets, and saved millions of lives.

What if Atlantis wasn't a myth but an early precursor to a new age of great flooding? Across the globe, scientists and civilians alike are noticing rapidly rising sea levels and higher and higher tides pushing more water directly into the places we live, from our most vibrant, historic cities to our last remaining traditional coastal villages. With each crack in the great ice sheets of the Arctic and Antarctica and each tick upward of Earth's thermometer, we are moving closer to the brink of broad disaster.

That man should have dominion “over all the earth, and over every creeping thing that creepeth upon the earth” is a prophecy that has hardened into fact. So pervasive are human impacts on the planet that it’s said we live in a new geological epoch: the Anthropocene. The question we now face is: Can we change nature, this time in order to save it? Elizabeth Kolbert, the Pulitzer Prize-winning author of The Sixth Extinction, takes a hard look at the new world we are creating.

Nothing Like It in the World is the story of the men who built the transcontinental railroad. In Ambrose's hands, this enterprise comes to life. The U.S. government pitted two companies - the Union Pacific and the Central Pacific railroads - against each other in a race for funding, encouraging speed over caution. As its peak the work force approached the size of Civil War armies, with as many as 15,000 workers on each line. The surveyors, the men who picked the route, lived off buffalo, deer, and antelope.

After water and air, sand is the natural resource that we consume more than any other - even more than oil. Every concrete building and paved road on Earth, every computer screen and silicon chip, is made from sand. And, incredibly, we're running out of it. The World in a Grain is the compelling true story of the hugely important and diminishing natural resource that grows more essential every day, and of the people who mine it, sell it, build with it - and sometimes, even kill for it.

How did a simple design error cause one of the great disasters of the 1980s - the collapse of the walkways at the Kansas City Hyatt Regency Hotel? What made the graceful and innovative Tacoma Narrows Bridge twist apart in a mild wind in 1940? How did an oversized waterlily inspire the magnificent Crystal Palace, the crowning achievement of Victorian architecture and engineering? These are some of the failures and successes that Henry Petroski, author of the acclaimed The Pencil, examines in this engaging, wonderfully literate book.

His father conceived of the Brooklyn Bridge, but after John Roebling's sudden death, Washington Roebling built what has become one of American's most iconic structures - as much a part of New York as the Statue of Liberty or the Empire State Building. Yet, as recognizable as the bridge is, its builder is too often forgotten - and his life is of interest far beyond his chosen field. It is the story of immigrants, of the frontier, of the greatest crisis in American history, and of the making of the modern world.

Atoms and Ashes recounts the dramatic history of nuclear accidents that have dogged the industry in its military and civil incarnations since the 1950s. Through the stories of six terrifying major incidents—Bikini Atoll, Kyshtym, Windscale, Three Mile Island, Chernobyl, and Fukushima—Cold War expert Serhii Plokhy explores the risks of nuclear power, both for military and peaceful purposes, while offering a vivid account of how individuals and governments make decisions under extraordinary circumstances.

In our daily lives, we're surrounded by wires, pipes, utility poles, cell phone towers, and myriad other infrastructure that facilitates almost everything we do. Even though these systems are essential, when was the last time you gave them much thought? In On the Grid, Scott Huler sets out to understand all of the systems that shape our society - from transportation, water, and garbage to the Internet coming through our cable lines.

In the final decades of the 19th century, three brilliant and visionary titans of America's Gilded Age - Thomas Edison, Nikola Tesla, and George Westinghouse - battled as each vied to create a vast and powerful electrical empire. In Empires of Light, historian Jill Jonnes portrays this extraordinary trio and their riveting and ruthless world of cutting-edge science, invention, intrigue, money, death, and hard-eyed Wall Street millionaires.

Award-winning author William Rosen tells the story of the men responsible for the Industrial Revolution and the machine that drove it: the steam engine.

Earthquakes, floods, tsunamis, hurricanes, volcanoes - they stem from the same forces that give our planet life. Earthquakes give us natural springs; volcanoes produce fertile soil. It is only when these forces exceed our ability to withstand them that they become disasters. Together they have shaped our cities and their architecture; elevated leaders and toppled governments; influenced the way we think, feel, fight, unite, and pray. The history of natural disasters is a history of ourselves.

Firebrand conservative columnist, commentator, Internet entrepreneur, and number-one New York Times best-selling author Michelle Malkin tells the fascinating, little-known stories of the inventors who have contributed to American exceptionalism and technological progress.

It began with plutonium, the first element ever manufactured in quantity by humans. Fearing that the Germans would be the first to weaponize the atom, the United States marshaled brilliant minds and seemingly inexhaustible bodies to find a way to create a nuclear chain reaction of inconceivable explosive power. In a matter of months, the Hanford nuclear facility was built to produce and weaponize the enigmatic and deadly new material that would fuel atomic bombs.

As breathtaking today as when it was completed, Hoover Dam ranks among America's greatest achievements. The story of its conception, design, and construction is the story of the United States at a unique moment in history: when facing both a global economic crisis and the implacable elements of nature, we prevailed.

Through an unforgettable cast of characters, Pulitzer Prize-winning author Richard Rhodes explains how wood gave way to coal and coal made room for oil, as we now turn to natural gas, nuclear power, and renewable energy. Rhodes looks back on five centuries of progress, through such influential figures as Queen Elizabeth I, King James I, Benjamin Franklin, Herman Melville, John D. Rockefeller, and Henry Ford.

In the spring of 1931, in a rugged desert canyon on the Arizona-Nevada border, an army of workmen began one of the most difficult and daring building projects ever undertaken: the construction of Hoover Dam. Through the worst years of the Great Depression as many as five thousand laborers toiled twenty-four hours a day, seven days a week, to erect the huge structure that would harness the Colorado River and transform the American West.

Set against the backdrop of an expanding nation, Brilliant Beacons traces the evolution of America's lighthouse system, highlighting the political, military, and technological battles fought to illuminate the nation's hardscrabble coastlines.

The building of the Panama Canal was one of the greatest engineering feats in human history. A tale of exploration, conquest, money, politics, and medicine, Panama Fever charts the challenges that marked the long, labyrinthine road to the building of the canal. Drawing on a wealth of new materials and sources, Matthew Parker brings to life the men who recognized the impact a canal would have on global politics and economics.

Brunelleschi's Dome is the story of how a Renaissance genius bent men, materials, and the very forces of nature to build an architectural wonder we continue to marvel at today. Denounced at first as a madman, Brunelleschi was celebrated at the end as a genius. He engineered the perfect placement of brick and stone, built ingenious hoists and cranes to carry an estimated 70 million pounds hundreds of feet into the air, and designed the workers' platforms and routines so carefully that only one man died during the decades of construction.

Physical infrastructure in the United States is crumbling. The American Society of Civil Engineers has, in its latest report, given American roads and bridges a grade of D and C+, respectively, and has described roughly 65,000 bridges in the United States as 'structurally deficient'. This crisis - and one need look no further than the I-35W bridge collapse in Minnesota to see that it is indeed a crisis - shows little sign of abating short of a massive change in attitude amongst politicians and the American public.

The author of Last Train to Paradise tells the story of the largest public water project ever created - William Mulholland's Los Angeles aqueduct - a story of Gilded Age ambition, hubris, greed, and one determined man whose vision shaped the future and continues to impact us today.

The demolition of Penn Station in 1963 destroyed not just a soaring neoclassical edifice, but also a building that commemorated one of the last century's great engineering feats: the construction of railroad tunnels into New York City. Now, in this gripping narrative, Jill Jonnes tells this fascinating story - a high-stakes drama that pitted the money and will of the nation's mightiest railroad against the corruption of Tammany Hall, the unruly forces of nature, and the machinations of labor agitators.

The paths of the great American robber barons were paved with riches, and though ordinary citizens paid for them, they also profited. Les Standiford, author of the John Deal thrillers, tells how the man who turned Florida's swamps into the playgrounds of the rich performed the almost superhuman feat of building a railroad from the mainland to Key West at the turn of the century.

The Age of Railways was an era of extraordinary change which utterly transformed every aspect of British life - from trade and transportation to health and recreation. Full Steam Ahead reveals how the world we live in today was entirely shaped by the rail network, charting the glorious evolution of rail transportation and how it left its mark on every aspect of life, landscape and culture. Peter Ginn and Ruth Goodman brilliantly bring this revolution to life in their trademark style, which engages and captivates.

In the 30 years after the Civil War, the United States blew by Great Britain to become the greatest economic power in world history. That is a well-known period in history, when titans like Andrew Carnegie, John D. Rockefeller, and J. P. Morgan walked the earth. But as Charles R. Morris shows us, the platform for that spectacular growth spurt was built in the first half of the century. By the 1820s, America was already the world's most productive manufacturer and the most intensely commercialized society in history.

In the late nineteenth century, as cities like Boston and New York grew larger, the streets became increasingly clogged with horse-drawn carts. When the great blizzard of 1888 brought New York City to a halt, a solution had to be found. Two brothers - Henry Melville Whitney of Boston and William Collins Whitney of New York City - pursued the dream of his city being the first American metropolis to have a subway and the great race was on.

How did America become “one nation, indivisible”? What unified a growing number of disparate states into the modern country we recognize today? To answer these questions, Winchester follows in the footsteps of America’s most essential explorers, thinkers, and innovators. Introducing the fascinating people who played a pivotal role in creating today’s United States, he ponders whether the historic work of uniting the States has succeeded, and to what degree.

In this fresh and powerful work of environmental history, Martin Doyle explores how rivers have often been the source of arguments at the heart of the American experiment - over federalism, taxation, regulation, conservation, and development. Doyle tells the epic story of America and its rivers, from the US Constitution's roots in interstate river navigation, the origins of the Army Corps of Engineers, the discovery of gold in 1848, and the construction of the Hoover Dam and the TVA during the New Deal, to the failure of the levees in Hurricane Katrina.