Short answers, pulled from the story.
The oldest evidence of bread-making dates back 14,400 years to a site in northeastern Jordan. Archaeobotanical evidence reveals that the Natufian people were already grinding wild grains like einkorn and spreading the starch on flat rocks over fires to create a primitive flatbread. This discovery predates the invention of agriculture by thousands of years.
The Sumerians in southern Mesopotamia began baking an early form of leavened bread around 6000 BC. They likely passed this technique to the Egyptians around 3000 BC, who refined the process by intentionally adding yeast to the flour to create a lighter and more airy loaf. The ancient Egyptians were the first to control the fermentation process using airborne yeasts.
The structure of bread is defined by the interaction between two proteins found in wheat: glutenin and gliadin. Glutenin forms interconnected networks through interchain disulfide bonds, giving the dough its elastic nature, while gliadin binds weakly to these networks, providing plasticity. This unique combination creates an elastic-plastic foam where air pockets are trapped within the gluten network.
The Chorleywood bread process was developed in 1961 to revolutionize the way bread is made by using intense mechanical working of dough to dramatically reduce the fermentation period. This high-energy mixing allows for the use of grain with lower protein content, making bread production faster and cheaper than ever before. The process is now widely used around the world in large factories, enabling the mass production of bread at low costs to both manufacturers and consumers.
Sourdough is a type of bread produced by a long fermentation of dough using naturally occurring yeasts and lactobacilli, resulting in a mildly sour taste due to the lactic acid produced during anaerobic fermentation. Unlike commercial bread, which relies on industrially produced yeast, sourdough uses a starter that cultivates yeast and lactobacilli in a mixture of flour and water. The longer fermentation process not only develops more flavor but also breaks down undesirable phytates and increases the bread's biological accessibility to trace elements.