Add Yahoo as a preferred source to see more of our stories on Google. Over the past few years, you may have seen a viral poll asking whether you would press a red button or a blue button, usually ...

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.

Everyone on earth takes a private vote by pressing a red or blue button. If more than 50% of people press the blue button, everyone survives. If less than 50% of people press the blue button, only ...