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.

Frederick Law Olmsted is arguably the most important historical figure that the average American knows the least about. Best remembered for his landscape architecture, from New York's Central Park to Boston's Emerald Necklace to Stanford University's campus, Olmsted was also an influential journalist, early voice for the environment, and abolitionist credited with helping dissuade England from joining the South in the Civil War. This momentous career was shadowed by a tragic personal life, also fully portrayed here.

James Gleick's story begins at the turn of the 20th century, with the young H. G. Wells writing and rewriting the fantastic tale that became his first book, an international sensation: The Time Machine. A host of forces were converging to transmute the human understanding of time, some philosophical and some technological - the electric telegraph, the steam railroad, the discovery of buried civilizations, and the perfection of clocks.

Paper is one of the simplest and most essential pieces of human technology. For the past two millennia, the ability to produce it in ever more efficient ways has supported the proliferation of literacy, media, religion, education, commerce, and art; it has formed the foundation of civilizations, promoting revolutions and restoring stability.

Rejecting fragmented histories of nations in the making, this bold revision surveys the shared institutions that bridged difference and distance to bring stability and meaning to the far-flung empire. By supporting new schools, law courts, and railroads along with scientific and artistic advances, the Habsburg monarchs sought to anchor their authority in the cultures and economies of Central Europe. A rising standard of living throughout the empire deepened the legitimacy of Habsburg rule.

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 this monumental history, Vaclav Smil provides a comprehensive account of how energy has shaped society, from pre-agricultural foraging societies through today's fossil fuel-driven civilization and offers listeners a magisterial overview of humanity's energy eras.

What does it actually mean to be rational? Not Hollywood-style "rational", where you forsake all human feeling to embrace Cold Hard Logic, but where you make good decisions, even when it's hard; where you reason well, even in the face of massive uncertainty; where you recognize and make full use of your fuzzy intuitions and emotions, rather than trying to discard them. In Rationality: From AI to Zombies, Eliezer Yudkowsky explains the science underlying human irrationality with a mix of fables, argumentative essays, and personal vignettes.

In the heart of the Scientific Revolution, when new theories promised to explain the affairs of the universe, Britain was broke, facing a mountain of debt accumulated in war after war it could not afford. But that same Scientific Revolution - the kind of thinking that helped Isaac Newton solve the mysteries of the cosmos - would soon lead clever, if not always scrupulous, men to try to figure a way out of Britain’s financial troubles. 

Judith Flanders, one of Britain's foremost social historians, explores the world portrayed so vividly in Dickens' novels, showing life on the streets of London in colorful, fascinating detail. From the moment Charles Dickens, the century's best-loved English novelist and London's greatest observer, arrived in the city in 1822, he obsessively walked its streets, recording its pleasures, curiosities, and cruelties.

The Crusades is an authoritative, accessible single-volume history of the brutal struggle for the Holy Land in the Middle Ages. Thomas Asbridge - a renowned historian who writes with "maximum vividness" (Joan Acocella, The New Yorker) - covers the years 1095 to 1291 in this big, ambitious, listenable account of one of the most fascinating periods in history.

David M. Potter's Pulitzer Prize-winning The Impending Crisis is the definitive history of antebellum America. Potter's sweeping epic masterfully charts the chaotic forces that climaxed with the outbreak of the Civil War: westward expansion, the divisive issue of slavery, the Dred Scott decision, John Brown's uprising, the ascension of Abraham Lincoln, and the drama of Southern secession.

The word medieval conjures images of the “Dark Ages”. But the myth of darkness obscures the truth; this was a remarkable period in human history. The Bright Ages recasts the European Middle Ages for what it was, capturing this 1,000-year era in all its complexity and fundamental humanity, bringing to light both its beauty and its horrors. The Bright Ages takes us through 10 centuries and crisscrosses Europe and the Mediterranean, Asia, and Africa, revisiting familiar people and events with new light cast upon them.

The first volume of Will Durant's Pulitzer Prize-winning series, Our Oriental Heritage: The Story of Civilization, Volume I chronicles the early history of Egypt, the Middle East, and Asia.

As the dominant species on Earth, humans have made astonishing progress since our ancestors came down from the trees. But how did the descendants of small primates manage to walk upright, become top predators, and populate the world? How were humans able to develop civilizations and produce a globalized economy? Now, in The Age of Wood, Roland Ennos shows for the first time that the key to our success has been our relationship with wood.