You’ve probably noticed it a hundred times but never really thought about it– those two buttons on your toilet flush. One small, one big. You press whichever feels right in the moment, without ...

You see it daily, several times, but never really think about why it’s like that. The buttons on your toilet flush—why are there two buttons, a big one and a small one? Are you pressing the correct ...

If you’ve ever looked at your toilet flush, you’ve probably noticed two buttons instead of one, a small one and a big one. Most of us press whichever button feels right, without thinking twice. But ...