How did personal injury lawyer billboards become so common across America? The answer is a combination of factors, including a nationwide spike in spending on legal advertising and the power of trends.

BIG QUESTIONS
Ever wonder why we say "o'clock"? Discover the medieval origin of the phrase, how mechanical clocks changed timekeeping, and why the contraction stuck.
Hundreds of years after this Italian explorer was born, we were shouting his name across the pool—but why?
Fortune cookies as we know them today may actually been created by Japanese Americans.
Why is purple associated with royalty? The answer dates back thousands of years to an incredibly expensive dye made from sea snails.
The white flag has symbolized surrender for centuries, but its use wasn’t random. Discover why white became the color of capitulation.
Test your problem-solving abilities and see how well you can think outside the box with this riddle challenge!
The historical narrative that began with one Italian scholar and lasted for centuries.
The phrase "elephant in the room" wasn't always about awkward topics. Here's how the idiom evolved over the past two centuries.
It depends on the location, but there are very important rules to the color of fire hydrants.
Why do we say “add insult to injury”? Discover the surprising history behind this common phrase, which dates back to Ancient Rome.
Originally adopted to hide traces of baldness and venereal disease, today the wig has become an indispensable part of English courtroom uniforms.
While the events of the epic poem cannot be verified, much of its content corresponds with historical and archaeological evidence.
Ears have a special significance in cultures around the world. Here's what it might mean if your left ear is ringing.
The tradition of wearing a yellow jersey in cycling races dates back to the Tour de France in the early 20th century.
U.S. mailboxes have been many different colors, but blue was adopted surprisingly recently. Here's the story behind the shade.
The phrase "put a sock in it" has been telling people to quiet down for more than a century. Here's the most likely story behind the expression.
Accidents, the search for immortality, and war may have all played roles in the development of these aerial attractions. Here's how the word "fireworks" came to be.
The American flag has always been red, white, and blue—but those colors have a deeper history that dates back to the nation's colonial past.