Sourdough bread made with space yeast
Chapter 1

The invisible army of fermentation

Chapter 2

Kimchi and the Korean art of kimjang

Chapter 3

Miso and the enzymatic mastery of koji

Chapter 4

Yogurt and the global dairy revolution

Ch 1 · The invisible army of fermentation
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alicecooks Salt barriers protect beneficial microbes during food fermentation

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How microscopic life saves our food

alicecooks For 10,000 years, humans have preserved milk and vegetables without refrigeration by letting microbes consume sugars to create safe foods.

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Quiz

What acid is primarily responsible for lowering pH and preserving foods like pickles and kimchi?

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Quiz

Approximately how many years ago did early humans begin using fermentation to preserve food before refrigeration?

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Tiny Belly Buddies
BETA

alicecooks Sort ingredients into jars to discover how microbes ferment kimchi, miso, and yogurt.

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The great carbon dioxide bubble party

alicecooks Trapped gas bubbles create the refreshing fizz found in freshly fermented young kimchi

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Quiz

What type of environment, meaning 'without oxygen', is required for most classic fermentation processes to occur?

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Quiz

Which gas is released by fermenting microbes to make bread rise and young kimchi fizzy?

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We preserve things not by keeping them static, but by guiding how they change.

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Quiz

What is the general term for beneficial, live microorganisms that support human gut health when consumed?

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Quiz

Why does adding salt to a ferment help beneficial lactic acid bacteria dominate?

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Fun Fact

Sourdough space: In 2020, scientists successfully baked sourdough bread on Earth using a yeast strain that had been sent into space to study cosmic radiation.

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Quiz

Which genus of bacteria typically starts the early, bubbly phase of vegetable fermentation before acid-tolerant species take over?

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Quiz

What term describes the natural transition where different microbial communities take turns dominating a ferment over time?

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Glossary
microbe (noun)
A microscopic organism, such as a bacterium or fungus, that is invisible to the naked eye. In 1905, Stamen Grigorov identified the Bulgarian yogurt bacterium, a key organism in home dairy fermentation.

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Gossip

Which fermented food bubble texture is the most satisfying to you?

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Gossip

Would you eat 2,000-year-old preserved butter found in an Irish bog?

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