How does Currency work ?

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Harriet Tubman will soon replace Andrew Jackson as the face of the $20 bill, becoming the first woman in more than a 100 years and first African American ever to appear on the front of a paper note. But this is far from the first big change our nation currency has seen.

The eagle on your money may have a name. From 1830 to 1836, a certain bird swooped into Philadelphia’s U.S. Mint building so often that workers named him “Peter the Mint Eagle,” cared for him, and allegedly used him as a model for coin engravings for years to come.

Today, it costs more than a penny to make a penny. According to the U.S. Mint, it costs them roughly 1.7 cents per coin. These are the eight presidential myths that you need to stop believing right now.

Change adds up fast. In 2015, the TSA reported collecting $765,759.15 in loose change at airport security checkpoints across the country. They get to keep it all. Here are 11 incredibly fascinating facts about the FBI you’ll never believe are actually true!

U.S. paper money is not paper at all: It’s 75 percent cotton and 25 percent linen. In Ben Franklin’s day, people repaired torn bills with a needle and thread.

It takes about 4,000 double folds (first forward and then backward) before a bill will tear. It takes far fewer folds for a vending machine to reject your bill—but you can fix that by popping your Washington in the microwave for about 20 seconds to crisp it right up just like this video.

90% of US dollars carry traces of cocaine

If you thought carrying traces of cocaine was bad, the Southern Medical Journal found traces of fecal matter on 94% of dollar bills tested

All the US coins and dollar bills in circulation today are worth about $1.2 trillion

66% of all US cash is held overseas by foreign governments and individuals

1,400 years ago China created the first paper money

Switching US 1 dollar bills from paper to coins would save the government nearly $4.5 billion over the next 30 years

Every year, more monopoly money is printed than real money

Moving past simple bank notes, throughout the world US wealth accounts for $75 trillion. If this were to be evenly distributed among every person on Earth, we would all have $11,000

North Korea is the largest counterfeiter of US currency

If you have $10 in your wallet and no debt then you are wealthier than one quarter of Americans

If Bill Gates spent $1 million every day, it would take him 218 years to spend all of his money

Until World War II, tea bricks were used as currency in Siberia and Asia

Seashells used to be a fairly common form of currency in many parts of the world

More than 34% of an American's take-home income is spent on interest (credit cards, loans, etc)

The flu virus can remain infectious on a dollar bill for up to two weeks

Studies have found that arguing about money is the top predictor of divorce

The first credit card that could be used at multiple establishments was invented by Frank McNamara because he forgot his wallet when he was out to dinner with friends

Nearly 50% of Americans report that they are unable to pay a $400 emergency expense without borrowing