30 Hidden Secrets on Things You Use Every Day
The things that we use every day become such a huge part of our routines that we seldom notice their simplest features. However, look carefully and you may notice that your favorite items have been designed to do much more than you thought. For example, those blue bristles on your toothbrush actually make sense. They gradually lose their color over time. When the blue’s faded, it’s time to change your toothbrush.
Did you know that notebook margins aren’t for taking extra notes or practicing emojis? They were invented to protect people’s work. People used to live with a lot of hungry rats…
The skinny
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