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PODCAST

Gastropod

Cynthia Graber and Nicola Twilley

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

arts food

All Episodes

50:16

Canned Tomatoes and the Myth of the San Marzano

Gastropod ·

2026/01/13

Canned tomatoes are a perfect winter food. As you'll know from our tomato episode, the beautiful fruits in fresh aisle of the supermarket are mostly flavorless outside of the summer season—but the tomatoes that get packed in a can are cheap, readily available, and, most importantly, delicious year-round. This episode, we have the stories of how turtle poop, full English fry-ups, and an Italian romance helped turn the canned tomato into a pantry hero. Plus, are San Marzanos really the best tasting

en

42:33

Is Your Cinnamon Fake? Where Does Kefir Come From?...

Gastropod ·

2025/12/16

The season for holiday baking is upon us, and before you spice up your cookies and pies, you’ll probably want to know: is most of the cinnamon on grocery store shelves actually fake? That’s one question we’re investigating this week on behalf of you, dear listeners, in the latest installment of our popular Ask Gastropod series! This episode, we've got the scoop on what's real when it comes to cinnamon—because your buns deserve the truth. We're also putting our detective hats on to figure out where

en

50:45

Forget Plain Vanilla: You'll Never See The World's...

Gastropod ·

2025/12/02

Today, 'vanilla' often means boring, and yet the edible seedpod of this Central American orchid is one of the most expensive spices in the world, not to mention one of the most popular flavors globally. So how did this coveted bean get such a ho-hum reputation? Listen in this episode as Gastropod travels to vanilla's homeland in the highlands of Veracruz, Mexico, to investigate. It's a tale of botanical piracy, beaver butts, and ice-cream barges, in which an ingenious enslaved tween and the product

en

50:45

From Fountain of Youth to Fruit on the Bottom: How...

Gastropod ·

2025/11/18

Yoghurt is the most diverse section of the dairy case: from Icelandic skyr to creamy Australian, and fruity French Yoplait to full-fat Greek. With something to suit every palate, plus a dose of microbes to support healthy digestion, yoghurt is a staple food in the US, hero of a million smoothies, berry bowls, and snack breaks every day. Which is why it's pretty weird that, until about 50 years ago, most Americans had no idea what it was. This episode, we've got the story of the microbial miracle

en

48:19

Yes, You Really Can Make Food From Thin Air—And We...

Gastropod ·

2025/11/04

Every second of every day, plants on earth do something miraculous: they take the carbon dioxide from air and turn it into food. With very few exceptions, everything we eat starts out that way. But what if we wanted to cut out the middlemen, re-wild all those fields full of wheat and corn, and manufacture dinner directly from the atmosphere ourselves? Scientists began dreaming of turning air into food back into the 1800s, but it's only recently that dream has become a reality—with results that,

en

46:10

Pizza Pizza!

Gastropod ·

2025/10/21

At last, an episode on pizza! But that raises a tricky question: what exactly is pizza? As it turns out, the original pizzas from eighteenth-century Naples looked nothing like a standard slice—they were more like a focaccia, topped with oil, herbs, anchovies, or whatever else was on hand. Even after these first pizzas met the tomato, the dish was a local peculiarity—most Italians thought pizza was gross and weird until just a few decades ago. So how did we get from Neapolitan subsistence snack to

en

48:00

Everything You Know About Metabolism Is Wrong

Gastropod ·

2025/10/07

If you’ve heard of metabolism, you’ve probably heard endless tips and tricks to boost it, from working out to drinking green tea. The idea is that a slow metabolism leads to weight gain, and speeding it up makes it easier to shed pounds. But what if we told you that metabolic rate doesn't really have anything to do with why so many of us in the developed world are heavy? This episode, nutrition scientist Kevin Hall and science journalist Julia Belluz join us to debunk metabolic myths, starting with

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50:46

Durian Delight and Feijoa Fun: Adventures in Banned,...

Gastropod ·

2025/09/23

This week on Gastropod, a feast of fruits! Specifically, feijoa and durian—and, if you haven’t heard of either, you’re not alone. Unlike the ubiquitous strawberry or banana, durian and feijoa are only popular in a handful of countries and almost unknown in the US, and we wanted to know why—especially because the people who love them really love them. For New Zealanders, like journalist Kate Evans, feijoa is *the* taste of home, even though it's almost forgotten in its original homeland, in Brazil

en

43:01

Talking Taco

Gastropod ·

2025/09/09

Whether or not it's Tuesday, tacos pretty much always hit the spot—and not just in their homeland in Mexico. These days, the taco can be found all over the world, although it's acquired some strange new fillings along the way, from French fries to canned corn. It's hard to imagine something so universal having to be invented—but, in fact, the taco as we know it only emerged in the 1800s. In this episode, Gastropod talks taco with the experts, peering through the salsa-smudged veil of history to

en

50:48

Tomatoes: A Love Story

Gastropod ·

2025/08/19

The tomato is Gastropod’s favorite flavor of summer, and we’re not alone: today, it’s the most popular vegetable on the planet, despite the fact that it's technically a fruit. But, until a couple of hundred years ago, the tomato wasn't really anyone's favorite. In South America, where the tomato originates, no one even bothered to domesticate it; in Mexico, the Aztecs seem to have preferred tomatillos; Renaissance Europeans thought this member of the nightshade family was practically poisonous; and,

en

45:20

The Most Dangerous Fruit in America

Gastropod ·

2025/08/05

It's the epitome of summertime: there’s nothing like a cold, juicy slice of red watermelon on a swelteringly hot day. But, once upon a time, watermelons were neither red nor sweet—the wild watermelon has white flesh and a bitter taste. This episode, we scour Egyptian tombs, decaying DNA, and ancient literature in search of watermelon's origins. The quest for tasty watermelon continues into modern times, with the rediscovery of a lost (and legendarily sweet) varietal in South Carolina—and the

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54:56

The Colorful Tale of Mexico's A-maize-ing Grain

Gastropod ·

2025/07/22

This might sound corny, but the relationship between maize and humanity is essential. We rely on corn—globally, more maize is grown than wheat or rice—and, in turn, corn is utterly dependent on us, to the extent that it's lost the ability to reproduce without our help. But corn's wild ancestor is such an unappetizing weed that, for decades, archaeologists couldn't believe today's juicy cobs were all descended from it. From this unpromising beginning, we've got a story that involves empires,

en

35:22

Should You Be Eating Poison Oak?

Gastropod ·

2025/07/08

Probably not. But Wall Street Journal reporter Jeff Horwitz decided to try it anyway, putting his body — and specifically his butt — on the line to answer a seemingly straightforward question: Is it possible to build up a tolerance to poison oak by eating it? (Guest episode)Learn more about your ad choices. Visit podcastchoices.com/adchoices

en

50:13

Ask Gastropod: Bubblegum, Meal Kits, and the Real...

Gastropod ·

2025/06/24

What do bubblegum, rooibos tea, and meal kits have in common? They’re all topics that puzzle and fascinate you, dear Gastropod listeners. This episode, we're getting to the bottom of your most pressing culinary questions! Such as: Are meal kits really better for the planet than buying and cooking dinner from scratch? Can all the rooibos tea in the world reallycome from one mountain range in South Africa? And what the heck is bubblegum flavor, anyway? Join us this episode for the scoop on meal kits,

en

56:26

Feasting With Montezuma: Food and Farming in a...

Gastropod ·

2025/06/10

Five centuries ago, before Spanish conquistadors arrived, what's now Mexico City was the Aztec capital of Tenochtitlan—and it took the European invaders' breath away. It was built on an island threaded with canals; it was one of the largest cities in the world; and the Spanish could hardly believe the sheer volume of food sold in the city's main market, let alone the quantity and variety of dishes enjoyed by the Aztec leader, Montezuma. But how did a city built in a lake—and located in a part of the

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54:13

Bananageddon! Say Goodbye to *the* Banana, and Hello...

Gastropod ·

2025/05/27

Yes, it's true: the banana we know and love is going the way of the dodo bird. An incurable strain of the fungal Panama disease known as TR4 is currently wiping out tens of thousands of acres of banana plantations, from Malaysia to Australia and Mozambique to El Salvador. But what's bananas is that this has all happened before! Is history doomed to repeat itself? Find out in the grand finale of our banana series. It's banana-pocalypse then *and* now, in this story of CIA subterfuge and human

en

50:11

Going Bananas: How a Tropical Treat Became the...

Gastropod ·

2025/05/13

In 1870, a strange fruit arrived on the docks in New Jersey, starting an industry that would change the world. That fruit was a banana, and, although it was a staple food in tropical regions, most Americans had never tried one. Today, a century and a half later, even the most depressing gas station, corner store, or hotel breakfast buffet in the land has bananas on offer. This week, we’re exploring the story of how humans transformed a tiny berry full of tooth-breaking seeds into the soft, yellow,

en

55:57

Do We Really Have Beer to Thank for the First Writing...

Gastropod ·

2025/04/22

Humanity's love affair with beer goes *way* back: 5,000 years ago, the civilization that arose in Mesopotamia invented writing, and one of the very first things they wrote about was... beer! But where was beer itself invented? This episode, we've got the story of beer's origins, the debate over whether humanity domesticated grains for brewing or for baking, and why beer was so essential to the smooth functioning of the world's first cities and states. But the story of how we know this—how we can

en

51:46

Seed Oil Scare: The Curious Case of Canola

Gastropod ·

2025/04/08

If you've been hearing that canola is a killer, you're not alone. It's one of the so-called "hateful eight" seed oils: Robert F. Kennedy, Jr. says it's among the most deadly things you can eat, and Joe Rogan agrees. But is it true? This episode, we get to the bottom of the debate over the plant formerly (and still, in some places) known as rapeseed. Why does it have such an unfortunate name, and how did it transform into canola, at least in North America? Is it really engine oil? Does it actually

en

60:33

Nutrition Advice Decoded: What Foods Are Actually...

Gastropod ·

2025/03/25

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 hidden history of how nutrition science got started, why its early

en

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