The answer might surprise you.

BIG QUESTIONS
It's a marvel of poop-related engineering.
Today, people around the globe will feel uneasy about getting out of bed, leaving their homes, or going about their normal daily routines, all because of a superstition.
It doesn't always mean you're anxious.
Before the 20th century, concert musicians might tune their instruments to wildly different pitches, depending on where they were playing.