On the final day of the typical office workweek, many employers give their workers the opportunity to dress down and loosen the rules on the standard dress code.

BIG QUESTIONS
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.
One technological breakthrough left the common pencil in the dust.