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For as long as mankind has existed, so has the need for transportation. Before our ancestors had even invented the wheel, we used sticks and animal skins to make primitive stretchers, helping us to carry loads from place to place in a way that would be impossible to achieve by hands alone. As we’ve evolved, so has our ability to build. The superstructures we build today can be hundreds of feet wide or long, and weigh thousands of tonnes. As the load gets bigger, the means of transportation become more sophisticated, more innovative, and more exciting. Today we’re looking at seven of the most incredible transportation achievements of all time.