History Unplugged Podcast

• Microbes Were Discovered in the 1600s. Why It Take 200 Years For Doctors To Start Washing Their Hands?

  Scientists and enthusiastic amateurs first confirmed the existence of living things invisible to the human eye in the late sixteenth century. So why did it take two centuries to connect microbes to disease? As late as the Civil War in the 1860s, most soldiers who perished died not on the battlefield but of infected wounds, typhoid, and other diseases. Twenty years later, the outcome might have been different, following one of the most radical intellectual transformations in history: germ theory, the recognition that the tiniest forms of life have been humankind’s greatest killers. It was a discovery centuries in the making, and it transformed modern life and public health.As today’s guest, Thomas Levenson (author of “So Very Small: How Humans Discovered the Microcosmos, Defeated Germs—and May Still Lose the War Against Infectious Disease”) reveals in this globe-spanning history, it has everything to do with how we see ourselves. For centuries, people in the West, believing themselves to hold dominion over nature, thought too much of humanity and too little of microbes to believe they could take us down. When nineteenth-century scientists finally made the connection, life-saving methods to control infections and contain outbreaks soon followed. The next big break came with the birth of the antibiotic era in the 1930s. And yet, less than a century later, the promise of the antibiotic revolution is already receding due to years of overuse. Is our self-confidence getting the better of us again?So Very Small follows the thread of human ingenuity and hubris across centuries—along the way peering into microscopes, spelunking down sewers, visiting army hospitals, traipsing across sheep fields, and more—to show how we came to understand the microbial environment and how little we understand ourselves. Levenson traces how and why ideas are pursued, accepted, or ignored—and hence how human habits of mind can, so often, make it terribly hard to ask the right questions.See omnystudio.com/listener for privacy information.

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• From Einstein’s Chalkboard to Oppenheimer’s Nuclear Test: The 50-Year Path to the Atomic Bomb

  The story of the atomic age began decades before Robert Oppenheimer watched a mushroom cloud form over the New Mexico desert at the Trinity nuclear test in mid 1945. It begins in 1895, with Henri Becquerel’s accidental discovery of radioactivity, setting in motion a series of remarkable and horrifying events. By the early 20th century, a brilliant group of scientists—including Ernest Rutherford, Leo Szilard, Enrico Fermi, and others—were pushing the boundaries of knowledge, seeking to answer fundamental questions about this source of energy that had 2 million times the energy density of oil: What is this mysterious radiation? Could it provide an infinite energy source, where a basketball of it was equal to an oil field? And, ominously, could it be weaponized? Today’s guest is nuclear physicist Frank Close, author of “Destroyer of Worlds: The Deep History of the Nuclear Age.” We look at the complete history of the atomic age, from the initial curiosity about radioactivity to the creation of the hydrogen bomb—a weapon of almost unimaginable destructive potential, capable of eradicating life on Earth. This is an account of the scientific discoveries that unlocked the atom’s power, the ethical dilemmas faced by scientists, and the horrifying realization that this newfound energy could lead to humanity’s undoing.See omnystudio.com/listener for privacy information.

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  48:14
• Japan’s Desperate Air Battles Against the US in the Final Months of WW2

  The B-29 Bomber led the Allied strategic bombing offensive against Japan, succeeding when US Bomber Command switched from high-level daytime precision bombing to low-level nighttime area bombing. The latter tactic required Superfortresses to attack their targets individually, without a formation or escorting fighters for protection. Despite this, Japanese night fighters proved unable to stop the B-29s. This success was a testament to the B-29’s incredible capabilities, including its ability to carry up to 20,000 pounds of bombs over vast distances exceeding 3,000 miles, and its advanced pressurized cabin, which allowed crews to operate effectively at altitudes above 30,000 feet—far beyond the reach of most enemy interceptors. Coupled with its sophisticated remote-controlled gun turrets and a top speed of 350 mph, the B-29’s design showcased an unmatched blend of range, payload, and defensive prowess that overwhelmed Japanese defenses. Today’s guest, Mark Lardas, author of “B-29 Superfortress vs Japanese Nightfighter.” He examines the capabilities of the aircraft involved, and reveals the conditions under which both sides fought. He evaluates the cutting-edge technology of both sides and how it affected the outcome of the battleSee omnystudio.com/listener for privacy information.

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  37:15
• D-Day From the East: The Soviet Operation Bagration Crippled the Wehrmacht in Late 1944

  Throughout the war on the Eastern Front, there were two consistent trends. The Red Army battled to learn how to fight and win, while involved in a struggle for its very survival. But by 1944 it had a leadership that was able to wield it with lethal effect and with far more effective equipment than before. By contrast, the Wehrmacht had commenced a slow process of decline after the invasion of the Soviet Union. Hitler became increasingly unwilling to delegate decision-making to commanders in the field, which had been crucial to earlier success. The long years of fighting had also taken a heavy toll. Thousands of irreplaceable junior officers and NCOs were dead, wounded or prisoners.Today’s guest is Prit Buttar, author of “Bagration 1944: The Great Soviet Offensive.” We look at these trends, which culminated in the huge battles of Bagration. In 1944, the Red Army finally put together a campaign that utterly destroyed the German Army Group Centre. The Wehrmacht suffered the loss of over 300,000 men killed, wounded or taken prisoner and the Red Army rolled forward across Belarus to the outskirts of Warsaw. The end of the war was still many months away, and the Germans managed to reconstruct their line on the Eastern Front, but final victory for the Soviet Union was now only a matter of time as a direct consequence of Bagration.See omnystudio.com/listener for privacy information.

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• Pilgrimages Involved Penitent Marches, Visiting Holy Places, and Watching Drunken Emperors Go on Chariot Rides

  Pilgrimages are a universal phenomenon, from China’s bustling Tai Shan to the ancient Jewish treks to Jerusalem. But why? What is it about a grueling penitent march to an isolated temple that has become a prerequisite for a civilization of any size, whether Chicen Itza in the Mayan Empire or the holy sites of Mecca? To explore this is today’s guest, Kathryn Hurlock, author of “Holy Places: How Pilgrimages Changed the World.” We also look at whether pilgrimages have become too easy in the 21st century. Has jetting off to Mecca or Rome for a quick indulgence turned them into spiritual tourism, a la Disneyland?See omnystudio.com/listener for privacy information.

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