Watch Rope Get Made From a Tree Using a Thousand-Year-Old Technique

Making rope is hard. Making rope the way the Vikings did it over a thousand years ago is even harder. First, you have to find the right tree. Then, you have to strip the bark of the tree when the sap is rising. And then, you soak the bark you just harvested in the sea for three to four months before you can even think about turning it into rope.

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Source: io9