If you wonder how things work on a daily basis you may want to know these 10 more everyday things you don't know the purpose of. From the little dial at the bottom of traffic lights to the hole in lollipop sticks and the clever cap on utility knives they're pretty interesting so get ready to be amazed!
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"Chillin Hard" Kevin MacLeod (incompetech.com), Licensed under Creative Commons: By Attribution 3.0 License, http://creativecommons.org/licenses/b...