Have you ever noticed how some electrical outlets in your home look slightly different from the rest? Instead of a smooth plate, these outlets feature two small buttons, often colored black and red.

Artists for Ceasefire has rallied actors, filmmakers, and other creatives behind the red-pinned call for nonviolence. Credit: Frazer Harrison / Getty Images If you spy a small red button on the lapel ...

Almost all TV remote controls have red, green, yellow, and blue buttons. However, most people are unaware of what these four colored buttons do. You've probably noticed that almost every remote, ...