Did you know that, for a time, there was a $10,000 bill? That's right! The bill featured the portrait of Salmon P. Chase, President Lincoln's Secretary of the Treasury, and it was the highest denomination of US currency ever to be publicly circulated! While there was also a $100,000 bill, the latter was only used for large transactions between Federal Reserve Banks.

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We're totally used to seeing Abraham Lincoln's face on a penny, but that wasn't always the case.

Lincoln's image first appeared on the penny in 1909 to commemorate the 100th anniversary of his birth, making him the first US president to appear on a coin, an honor befitting our great Honest Abe! More than 115 years have passed since that addition, and his face is still featured on the iconic penny.

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In addition to featuring Abraham Lincoln's face, pennies are famous for their classic copper color. However, there was one year when the penny took on a different hue.

During WWII, a copper shortage occurred, hindering the usual production of pennies. For that reason, in 1943, pennies were made of steel coated in zinc, giving them a silver color and making them closely resemble dimes.

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Did you know that, in the 19th century, the US had 2- and 3-cent coins? That's right! The 2-cent coin was minted from 1864 to 1873. On the front, it featured a shield symbolizing the Union during the Civil War. On the reverse, it bore the phrase "In God We Trust," making it the first coin to use the motto. The 3-cent coin had two versions: the silver 3-cent coin (1851–1873) and the nickel 3-cent coin (1865–1889).

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While each coin is used with a different frequency, the average lifespan of a coin can be as long as 40 years! Just think about all the places and situations it might pass through during that time. Of course, the more a coin circulates, the quicker it will wear down. That’s why the penny has the shortest lifespan, lasting about 25 years on average.

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"In God We Trust" is not only the official motto of the United States (and the state of Florida), but also the phrase that appears on all US currency currently in circulation. But how long has this phrase been there?

"In God We Trust" first appeared on some coins during the Civil War, starting with the aforementioned 2-cent piece. By 1938, the motto appeared on all US coins, but it wasn't until 1955 that President Eisenhower signed a law requiring "In God We Trust" to be included on all US coins and paper money.

Image: Kelly Sikkema

Today, US coins are primarily made of zinc, copper, and nickel. However, back in the early days of the US Mint, things were quite different. In the past, US coins were made not just of copper, but also of silver and even gold!

Over time, using those materials for coins became too expensive, and production shifted to more affordable metals such as zinc and nickel.

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When coins were made of precious metals like gold and silver, there was always the risk that someone might tamper with or shave the edges to extract the valuable material. Fortunately, the brilliant Isaac Newton came to the rescue. He introduced the clever idea of adding reeded edges to coins, which helped protect them from opportunistic tampering. With these marked edges, any shaving of the coin would be immediately noticeable. Pretty smart, right?

Image: Joshua Hoehne

The US Mint manufactures billions of coins each year for circulation, and while that’s nothing new, there’s something about it that might surprise you: the United States is actually the world’s largest producer of coins. No other country makes more!

Pennies, nickels, dimes, and quarters are produced in large quantities every day. But that’s not all—dollar coins and special collectors’ coins are also minted, though in much smaller amounts.

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Our paper money isn’t actually made of paper. It’s composed of 25% linen and 75% cotton. This blend gives US bills greater strength and flexibility, making them not only more durable but also more difficult to counterfeit. Plus, if you accidentally toss a buck in the washing machine, there’s a good chance it’ll come out just fine!

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