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In addition to the man-made perils of the journey, there are dangers such as heat and natural predators, e.g. the rattlesnake hidden behind the cactus (far right). In close proximity to the rattlesnake is a petroglyph of a snake on a rock indicating that migrations have been taking place over eons. What is unique to the present day are the man-made barriers to travel, as symbolized by the “Road Closed” sign.
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