You've seen it pretty much every day now for decades, and you've interacted with it just as many times, but have you ever wondered why the power symbol looks the way that it does? There's a joke that ...

What does the black fist mean? To some, a clenched fist is just a fist. At its worst, it’s something capable of inflicting bodily harm. But beyond a clenched fist’s ability to pummel lies its capacity ...