On September 2, 1952, a team of surgeons in Minneapolis stepped into uncharted territory. Facing long-standing medical taboos and a dying five-year-old patient named Jacqueline Johnson, Dr. F. John Lewis and Dr. C. Walton Lillehei attempted what many deemed impossible: operating directly inside a stopped human heart. Equipped with an ice-blanket cooling system and an ordinary livestock watering trough ordered from a Sears Roebuck catalog, the team bought themselves a strict, heart-stopping window of just a few minutes to repair a congenital defect. This is the story of the five and a half minutes in the Twin Cities that shattered centuries of surgical fear, sparked the rise of Minnesota’s Medical Alley, and changed the course of modern medicine forever.

Key Topics & Historical Highlights:

• The 1952 Heart Surgery: Inside the groundbreaking operation by Dr. F. John Lewis and first assistant Dr. C. Walton Lillehei.
• Deep Hypothermia & Inflow Occlusion: How lowering core body temperature created a safe 5-minute to 10-minute surgical window.
• Sears Trough to Bubble Oxygenator: How low-tech rewarming led to Richard DeWall’s $15 disposable bubble oxygenator in 1955.
• Minnesota Medical History: The Twin Cities origin story that sparked the birth of Minnesota's Medical Alley and modern cardiac innovation.

What happens when 28 million board feet of timber ignite under a 4-mile-high vortex of fire? On September 1, 1894, a catastrophic firestorm consumed over 400 square miles of Pine County, Minnesota, killing more than 418 people in just four hours. We explore the brutal weather inversion, the 2,000-degree inferno, and the incredible bravery of train crews who reversed through walls of flame to save hundreds of lives. Learn how Engineer James Root, Porter John Blair, and local heroes, Edward Barry, William Best navigated total devastation, and how the disaster birthed Minnesota’s very first forest fire prevention laws.

Long before the IDS Center dominated the Minneapolis skyline, utility magnate Wilbur Foshay commissioned a 447-foot Art Deco building to represent his own unshakeable ambition. Modeled after the Washington Monument, The Foshay Tower was built with 100% union labor in defiance of local business leaders. It was the tallest building between Chicago and the Pacific coast. Dedicated over Labor Day weekend in 1929 with 25,000 guests, 19-gun salutes, and a custom march by John Philip Sousa, the obelisk projected absolute financial permanence. Just 67 days later, Black Tuesday shattered Foshay's paper empire. Explore the dramatic rise, federal trials, and tragic juror scandal behind Minnesota's most iconic landmark.

Here is our last installment of archival episodes, returning to fresh episodes on August 31.

On May 9, 1972, a peaceful anti-war rally at the University of Minnesota transformed into eight days of chaos, complete with burning barricades, Minnesota National Guard deployments, and police dropping tear gas from helicopters over campus. We explore the turbulent history of the UMN anti-war protests, Minnesota’s local ties to Honeywell cluster bombs, and a Grand Jury investigation that shocked the Twin Cities.

This is a good one if you haven't heard and a crowd favorite to share. It made the top of the list for some listeners from their feedback. It helps to know what resonates.

On the evening of May 6th, 1965, six tornadoes, four of them among the most violent on the Fujita scale, tore through the Twin Cities over three hours. Thirteen people were killed. This is the story of the storms. It is also the story of a debate inside a Weather Bureau office, a physical key, and one forecaster's decision to repurpose Cold War infrastructure. This episode is dedicated to Paul Huttner, who retired on May 1 after forty years as chief meteorologist at Minnesota Public Radio News. He was four years old on May 6th, 1965. It is the night that inspired him to be a meteorologist. Thank you for your service to our communities.

I'm on vacation with the family so playing this one from the archives. This episode was released a few weeks after the premiere of the podcast, so this one was truly a popular one.

Minnesota hasn't executed anyone in over a century, and we reveal the gruesome reason why. Discover how a smooth talking Minneapolis sociopath and a catastrophic mathematical error in a St. Paul basement collided on the exact same calendar day to force a statewide moral reckoning. This is the dark history the state tried to censor until the newspapers risked everything to print it.

On May 3rd, 1959, a British cargo ship named the Ramon de Larrinaga sailed under Duluth's Aerial Lift Bridge and became the first oceangoing vessel in history to reach the western end of Lake Superior. She had crossed the Atlantic from Liverpool. She had navigated sixteen sets of locks through the newly opened St. Lawrence Seaway. And she had arrived in a city that sixty years earlier had been described as a lifeless corpse. Today's episode is the story of how Minnesota's Iron Range helped build a waterway, how entire communities were flooded to make it possible, and how a port city at the heart of the continent became connected to the world.

On May 2nd, 1878, a flour dust explosion destroyed the Washburn A Mill in Minneapolis, the largest flour mill in the world, killing eighteen men and devastating the city's milling capacity. What followed transformed not just Minneapolis but the entire country, from the safety innovations that changed flour milling worldwide, to the birth of the Minneapolis Fire Department, to the brands that are still in your kitchen today. General Mills, Gold Medal Flour, Pillsbury, Betty Crocker, WCCO Radio, and the Washburn Center for Children, all trace their origins to one catastrophic Thursday evening on the banks of the Mississippi River.