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I was poking around YouTube the other day and found this video produced by Rio a couple years back. Maybe you’ve seen it, but I hadn’t, and given that I could watch monotonously-narrated shows that tell you how pencils, bridge cables, or golf balls are made for hours on TV, imagine my delight when I found this behind-the-scenes look at how fly line is made. Make snore sounds if you like, but it’s pretty interesting. Consider it your chemistry, physics, and science lesson for the day.

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