How Do They Do It?
Season 16 Episode 14 of 20
A look at how the tallest buildings in the world are cleaned. Plus, the process to make a jigsaw where every piece is unique
How Do They Do It? airs on Discovery Channel HD at 7:30 AM, Friday 20 September. (Subtitles.)
Learn more about How Do They Do It? and other education/science/factual topics on our factual page
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