Watch Modern Marvels online: Episode Bread

It's the basic source of nourishment for half the world--bread. Bake it, roast it, slice it, toast it--it's a wonder that three simple ingredients, flour, water and salt, can be transformed into so many different shapes and tastes. From baguettes to pita, from corn bread to flour tortillas, every culture finds a way to make it and bake it.

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