For the most part, we tend to keep our clothes relatively clean and avoid spills and rips and tears. But denim is so hard-wearing and hard-working that it just kind of amasses more and more signs of wear. So you can learn a lot from observing an old pair of blue jeans. Articles of Interest is a show about what we wear, created by Avery Trufelman; a six-part series within* 99% Invisible*, looking at clothing.