Gastropod
Food with a side of science and history. Every other week, co-hosts Cynthia Graber and Nicola Twilley serve up a brand new episode exploring the hidden history and surprising science behind a different food- or farming-related topic, from aquaculture to ancient feasts, from cutlery to chile peppers, and from microbes to Malbec. We interview experts, visit labs, fields, and archaeological digs, and generally have lots of fun while discovering new ways to think about and understand the world through food. Find us online at gastropod.com, follow us on Twitter @gastropodcast, and like us on Facebook at facebook.com/gastropodcast.
Episodes
Are eggs going to give you high cholesterol, or are they the base of a great protein-rich meal? Will coffee give you cancer, or will it help you live longer? If you're confused about what nutrition science has to say about which foods are healthy and which are not, you're not alone. But why is it so hard to figure out what's good for us, and why does the advice seem to change constantly? This week on Gastropod, we reveal the hidde...
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March 11, 2025 • 51 mins
Quinoa is everywhere these days, the base for a million salads and grain bowls. But, until recently, barely anyone outside the nutritious seed's ancient's homeland—the Peruvian and Bolivian Andes—had ever heard of it. This week, we're telling the story of how a gorgeous spinach-like plant traditionally grown in a remote, high-altitude region of South America was transformed into one of the hottest foods on the shelves at Whole Food...
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During World War II, the Soviet city of Leningrad was surrounded, cut off from food supplies for nearly two and a half years. People were desperate: they ate boiled leather, machine oil, toothpaste, and wallpaper paste just to stay alive. But, in the center of the city, a group of botanists spent their days surrounded by food that they refused to touch—nuts, seeds, and even a basement full of potatoes—even as several of them starve...
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February 11, 2025 • 55 mins
Dry January may be over, but, for many people, drinking less alcohol or none at all is an increasingly common choice year-round. And, unlike in the past, when dealcoholized options were few and far between—and had a well-deserved reputation for tasting bad—there’s now a booming market for non-alcoholic beers, wines, canned cocktails, and even spirits for the so-called "sober curious." But how do they get the booze out of our favori...
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January 28, 2025 • 40 mins
(Guest episode) On September 18, 1998, an unusual ad ran in USA Today — a company called John's Estate Sales was looking to buy a moon rock. But the phone number on the ad didn't lead to, say, a store front in a strip mall. Instead, the phone number belonged to Special Agent Joe Gutheinz at NASA.
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January 14, 2025 • 48 mins
(Guest episode) Matt wants to know how to tell if he’s being scammed by his dentist. To find the answer, we open up the surprising history of dentistry, ask why it seems so different from internal medicine, and drill down on why dental insurance doesn’t really feel like insurance. Explain It To Me's host Jonquilyn Hill talks with journalist Mary Otto and Dr. Lisa Simon, DMD, MD, to find the answers.
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December 17, 2024 • 55 mins
Just in time for the holidays, Ask Gastropod is back with a plate full of listener questions for your listening delight! You came to us with mysteries both large and small, both ancient and eternal, and, honestly, all totally fascinating. Such as: What is up with ranch dressing, and how did a bottled salad dressing invented by a plumber and owned by a cleaning products company become *the* flavor of America? What did Europe's oldes...
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December 10, 2024 • 45 mins
Taste is the oldest of our five senses, and yet perhaps the least understood. It's far more complicated than salty versus sweet: new research is dramatically expanding our knowledge of taste, showing that it's intimately connected to obesity, mood, immunity, and more. In this episode, we get into the science of how taste works, why we taste what we do, and what makes supertasters unique. And finally, we hack our taste buds—for fun,...
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December 3, 2024 • 51 mins
What’s the coolest flavor of the holiday season? It's peppermint, obviously, and it’s showing up in everything from coffee to chocolate and cookies to ice cream right now. But while standing in line for a peppermint mocha is a standard feature of the holiday season today, there was a time when this garden-standard herb was seen as so special—even powerful—that it made three American entrepreneurs rich enough to be crowned the "Pepp...
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November 19, 2024 • 55 mins
Next week, the US celebrates the dishwashing Olympics—also known as Thanksgiving. But how best to tackle the washing-up after the big meal can cause as much conflict as your uncle’s hot takes at the table. Do dishes get cleaner when they’re hand-washed or run through the dishwasher? Which is better for the environment? Are those convenient little detergent pods poisoning our oceans with microplastics? And who do we have to thank fo...
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November 12, 2024 • 43 mins
They're added to breakfast cereal, bread, and even Pop-Tarts, giving the sweetest, most processed treats a halo of health. Most people pop an extra dose for good measure, perhaps washing it down with fortified milk. But what are vitamins—and how did their discovery make America's processed food revolution possible? On this episode of Gastropod, author Catherine Price helps us tell the story of vitamins, from Indonesian chickens to ...
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November 4, 2024 • 62 mins
The Klamath River on the California-Oregon border was once the third largest salmon river in the continental U.S. There were so many fish, indigenous histories claim that you could cross the river walking across their backs—which made the peoples who lived in this remote, beautiful region some of the wealthiest in pre-colonial North America. But, for more than a century, salmon have been shut out of the Klamath: thanks to multiple ...
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October 29, 2024 • 47 mins
Today, a half century after Neil Armstrong took one small step onto the surface of the Moon, there are still just ten humans living in space—the crew of the International Space Station. But, after decades of talk, both government agencies and entrepreneurs are now drawing up more concrete plans to return to the Moon, and even travel onward to Mars. Getting there is one thing, but if we plan to set up colonies, we'll have to figure ...
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October 15, 2024 • 45 mins
To painters and poets in late-1800s France, absinthe was "the green muse" or the "green fairy," an almost magical potion that promised vivid dreams, wild ideas, and artistic inspiration with every sip. By the 1910s, this once incredibly popular herbal liquor was banned—not only in France, but in countries around the world. Condemned as the cause of both individual ruin and social decline, absinthe consumption was blamed for seizure...
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October 1, 2024 • 48 mins
Every day, at the end of service, restaurants throw away tons of entirely edible food: heaps of pastries and whole loaves of bread, vegetables chopped but not cooked, noodle dough, fish off-cuts, and more. An estimated 20 billion meals's worth of still edible food overall is tossed every year here in the US, and more than 85 percent of it ends up in the landfill. Meanwhile, more than one in ten Americans are food insecure. So why i...
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September 17, 2024 • 47 mins
It’s already begun: that time of the year now known across the land as Decorative Gourd Season. Squash are everywhere—carved into jack o’lanterns on front porches, adorning our sideboards and porches with strange shapes and autumn colors, and of course, baked into pies for fall celebrations. But get ready to rethink squash, because despite their slightly cheesy House Beautiful vibe and family-friendly pumpkin patch associations, th...
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September 10, 2024 • 48 mins
The produce section of most American supermarkets in the 1950s was minimal to a fault, with only a few dozen fruits and vegetables to choose from: perhaps one kind of apple, one kind of lettuce, a yellow onion, a pile of bananas. Today, grocery stores routinely offer hundreds of different fruits and vegetables, many of which would be unrecognizable to time travelers from a half century ago. What changed, and how did Americans learn...
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September 3, 2024 • 53 mins
School’s back in session, and kids are boarding the bus with lunchboxes in tow. Many of them contain sandwiches stuffed with turkey and ham slices, bologna, even salami—but where did these staples of the lunch break, not to mention the charcuterie platter, come from? Long before the 1900s meat-cute that birthed the deli sandwich, preserved meats were a standby in human diets: from dried yak cured in salt in the Himalayas, to pork f...
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August 20, 2024 • 57 mins
About ten years ago, insects were constantly being hyped as the future of food. Headlines proclaimed that, within the decade, everyone would be eating bugs as part of their daily diet—and saving the planet in the process. But while the buzz on edible insects hasn’t completely turned to crickets, the ento-revolution hasn't proceeded exactly as planned. In the Western world, insects are not yet what's for dinner, and, even in parts o...
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August 6, 2024 • 42 mins
When you buy a bottle of rum in the United States, by law nearly all the federal taxes on that rum must be sent to Puerto Rico and the U.S. Virgin Islands. It's an unusual system that Congress designed decades ago to help fund these two U.S. territories. In 2021 alone, these rum tax payments added up to more than $700 million. Puerto Rico and the Virgin Islands split the money according to how much rum each territory produces. And ...
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