The Big Universe Reader™ requires Flash Player 9 or later.

In narrative detail, Working Horses explores how these muscular animals have played a vital role in many parts of people's work lives, from hauling logs and heavy farm machinery to performing for audiences. Shouldering our heaviest burdens, horses have transported everything from royal chariots to covered wagons. Is it any wonder that even today an engine's strength is measured in horsepower?

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