There are more than 3,600 different known species of snake in the world, and they can be found on every continent apart from Antarctica. They come in all shapes and sizes, from ones smaller than a finger to those that are more than capable of swallowing a person, but there are some that you'll likely never get the chance to see in real life because they're incredibly difficult to find. These are the 15 rarest snakes in the world….

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