These CRAZY Facts Will Make You Say "I Had No Idea"

From interesting details about the USB symbol to neat tricks with Chinese takeout containers, these facts will make you say, "I had no idea."

There are many products that you've been using for years that have different origin stories and uses than most people realize.

Yes, That's a trident on your USB

If you take a closer look at your USB, it's a trident symbol. Where else can you find this emblem? King Neptune, no, not Jason Momoa's character in Aquaman, but the Roman God of Fresh Water and Greek God of the Sea. Experts theorize its a universal symbol for power.

An arrow on the gas gauge

At some point in your life, you've probably pulled your vehicle up to the wrong side of the gas pump to fill up your car. To prevent these events from happening again, glance at your gas gauge and look for the gas pump symbol and the arrow. Whichever way it's pointing is the side your gas tank's on.

Those Extra holes in Apple earbuds

It turns out your Apple brand earbuds have tiny holes in them for more than style—The additional pinholes on the side and back exist to improve the acoustics and help them stay in place. These don't transmit sound. Instead, they create a vacuum that eliminates the thumping noise from the cord's movements.

Pen cap holes save lives

Did you know there's a purpose to the holes on the tops of pens and markers? Children and adults chew on pen tops, leading to hundreds of deaths around the U.S. every year. To help lower the death rate from pen caps, manufacturers added a hole at the top to allow someone who's accidentally swallowed it to breathe while trying to dislodge it from their throat.

Airplane window holes, don't be scared

Yes, there is a small hole in your airplane's window at the bottom. But you don't need to worry. It's not a design flaw or damage. It's there to balance the air pressure between the three layers of glass, which also prevents the window from fogging, giving you a clear view outside.

A history of mini jean pockets

You've probably thought about the mini jean pocket and even used it from time to time, but you didn't know it once had a specific purpose. Jeans have a long history, originating with the Gold Rush in the 19th century California. Cowboys and gold miners used pocket watches during these times, and the small pocket inside the pocket kept the timepieces safe while they worked, rode, and went about their day.

Tricks with tape measures

Have you ever wondered why tape measures have a jagged, metal end? It's not a design flaw. Instead, it's a tool within a tool that assists with marking the object if you don't want to use a pen or pencil or simply forget to grab a utensil. Additionally, the angle of the tape measures tip allows you to make measurements without another person's assistance.

Heinz 57 what?

Actually, it was Heinz 57 pickle varieties long before it was the sauce, and the brand's never had 57 kinds of ketchup, despite the label. Dating back to 1892, Henry J. Heinz claims the slogan still in use today came from a shoe store's advertisement on a train car that he thought was catchy, even if it wasn't accurate. Over 100-years later, the company still doesn't have 57 varieties, but everyone knows the slogan.

Flames don't have shadows

The shadow you think you're seeing is the flame casting light. Shadows form when light is blocked, whereas a fire is a gaseous substance that can't block light.

Turn your Chinese takeout into a plate

Chinese takeout boxes are neat and easy to use on-the-go, but they also fold out into a plate to serve groups and for quick access to each dish. Think that's neat? You can do the same thing with the ketchup cups you get at fast food and similar restaurants.

It really is amazing how many different stories and facts there are behind popular products and everyday items.