Watch Modern Marvels online: Episode 2 Eggs

Each year in the U.S., 280 million hens lay 80 billion eggs, one of the world's most affordable sources of protein. Chart the journey of the egg from henhouse to breakfast table, from massive traditional Iowa farms, where millions of eggs move from hens to delivery trucks without being touched by human hands. See how powdered eggs get made and what happens to the billions of whites and yolks that go their separate ways.

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