Did you ever notice that the toilet paper color is usually white? But it turns out that colored toilet paper popped out on the shelves in the 1950s. You probably don’t care about the decorations when it comes to their toilet paper, but these patterns are actually a marketing tool to make the paper look more aesthetically pleasing. Moving out of the toilet and into the street: have you ever wondered why are the traffic lights red, green, and yellow? A lot of things you see or use every day have their secrets; let's find out more about them.

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