HOME Making-Of : Mauritania

For trade, humans overcame numerous obstacles--seas, deserts and mountains. First with rudimentary and then increasingly evolved means. By taming animals such as donkeys, horses and camels, humans were able to travel vast distances. When muscle power was no longer enough, oil and other types of fossil energy sources took over to fuel trains, trucks, cargo ships and airplanes that carry merchandise in ever larger quantities from one side of the globe to the other.

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