1

Town crier

In early American towns (and elsewhere in the world), before printed media and mass communication were the norm, news didn’t arrive through newspapers or broadcasts: it arrived by voice. Town criers walked streets ringing bells and loudly announcing public notices, laws, and important events . They were essential in communities where literacy was limited, and information traveled slowly.

2

Factory lectors

Nowadays, when you have some manual, boring labor to do, you can turn on the radio, listen to some music, or a podcast. Of course, that wasn’t an option once upon a time. In some factories, workers hired a lector to read aloud while they worked .

Starting in the mid 1800s and into the beginning of the 1900s, lectors in factories shared newspapers, novels, and political texts, keeping workers informed and entertained during long hours.

3

Elevator operator

Using an elevator seems easy enough today, but for decades, elevators didn’t run themselves. Operators manually controlled speed, direction, and stopping points using levers and switches , while also greeting passengers and announcing floors.

In luxury hotels and department stores, a skilled, often uniformed operator was part of the experience, expected to be polite, precise, and calm under pressure. The job peaked in the early 20th century, especially in big cities like New York and Chicago.

4

Switchboard operator

For early telephone calls, switchboard operators had to manually plug cords into panels to link callers together . The occupation rose shortly after Alexander Graham Bell patented the telephone in the 1870s, and became a fundamental job until the middle of the following century, when direct dialing was introduced.

Most operators were women, chosen for their calm voices, speed, and courtesy. They often memorized local names, numbers, and even callers’ personal habits and routines.

5

Bowling pinsetter

In early bowling alleys, pins did not magically reset themselves via machines. Pinsetters stood behind the lanes, manually rearranging pins after every roll.

It was noisy, repetitive, and sometimes dangerous work, often done by teenagers . It was only in the 1950s that automatic pinsetting machines were introduced.

6

Lamplighter

Since the beginning of the 19th century, every evening, lamplighters walked city blocks, lighting gas lamps one by one . At dawn, they returned to extinguish them. This job was vital for public safety because the lights helped prevent crime and accidents in dark streets.

It wasn’t until the 1880s that the first electric streetlights were introduced in some cities, but they weren’t the norm until the 1950s. At that point, the cost of maintaining gas pipes had become too high compared to electricity, so the last gas lamps were removed.

7

Milkman

For the first half of the 20th century, the milkman was a familiar sight on American streets. He delivered fresh milk in glass bottles, leaving them in insulated boxes by the door. Many families depended on daily or near-daily deliveries, since refrigeration was limited or unreliable. By the 1940s, however, most American homes owned a refrigerator and the role of milkmen slowly faded.

8

Typist

There was a time, before computers, autocorrect, and AI, when offices relied on professional typists to produce everything from letters to legal documents. Many large companies employed entire "typing pools," rooms filled with workers trained to type quickly and accurately on typewriters. Precision mattered more than you may think; unlike today, mistakes on paper (rather than the screen) sometimes meant starting the document over.

9

Human computer

There was also a time when "computers" were people; their occupation was first mentioned in texts from 1613. Their role was to develop complex mathematical calculations by hand for scientific research, engineering projects, and more. Astronomers during the Renaissance, navigators during the Age of Exploration, and NASA space missions all relied on human computing for their operations.

Imagine that: teams worked through equations for hours or days, checking each other’s math for accuracy. During World War II and the early Cold War, this work was vital to national defense.

10

Knocker-upper

Before the Industrial Revolution, most people woke up with the sun. However, by the early 1800s, when factory systems took hold of big cities, being even five minutes late ceased to be an option for workers. To avoid oversleeping, which could mean lost wages, they paid a person to wake them up.

Knocker-uppers walked neighborhoods early in the morning, tapping on windows with long poles or shooting dried peas through blowpipes . Eventually, alarm clocks were introduced in the late 1800s, and the need for this occupation started declining.

11

Telegraph operator

A case in which the occupation disappeared along with the technology. Before phones and instant messaging, the telegraph, which was invented in 1837, was the fastest way to send information across long distances.

Telegraph operators translated messages into Morse code , sending dots and dashes through wires that spanned the country. Speed and accuracy were critical, especially for news, business, and wartime communication. With the introduction of radio transmissions and telephones in the late 1800s, the service became more and more obsolete, although Western Union, the major telegraph service in the US, continued to operate until 2006.

12

Iceman

Finally, there were the icemen. Before refrigerators became household staples, the iceman was an essential figure in American daily life. He delivered massive blocks of ice straight to people’s homes .

These blocks kept food fresh and milk cold in an era before electric cooling. Ice was harvested from frozen lakes in winter, stored in insulated warehouses, and rationed carefully during warmer months.

1

What are bills made of?

Unlike other currencies, dollar bills are not made of paper or plastic. U.S. dollar bills are made from a special fabric blend composed of 75% cotton and 25% linen. This mix makes the bills extremely durable and resistant, and they can be folded about 4000 times before tearing.

2

What bills are valid?

Any U.S. dollar bill that was legally printed is valid, no matter how old, as American currency does not have an expiration date. While some bills might not be accepted by businesses of foreign exchange services due to their condition or if they are a discontinued version of the bill, the bills themselves are still valid, and American banks will accept them, though they might take them out of circulation.

3

American leaders

Five bills have a depiction of an American president. The exceptions are the $10 bill, with Alexander Hamilton on the front, and the $100 bill, with Benjamin Franklin. The $1 bill, depicting George Washington, is extremely symbolic: several elements are repeated 13 times as a nod to the thirteen colonies, and it showcases the Bald Eagle and the Eye of Providence as a sign of God watching over America.

4

A change in size

Did you know that dollar bills used to be so big that they were nicknamed "horse blankets"? Original dollar bills were 7.4 × 3.1 inches. In 1929, the Treasury Department reduced the size of bills to 6.14 × 2.61 inches to reduce production costs and materials. Old bills, though still valid, are worth much more as collector items.

5

Uniformity

Besides their value and design, all dollar bills have the same size (6.14 × 2.61 inches), color, and weight (1 gram) , which sets American currency apart from other countries where bills of different values are differentiated by size, color, or both. Why doesn’t the U.S. implement differences among bills? The cost of adapting vending machines, bank drawers, and ATMs to new bill sizes would cost billions of dollars.

6

Hard to copy

Originally, dollars were not green, but black. As time passed, green ink was favored, as it was cheap and did not fade as much as black. The new color also prevented people from using black-and-white cameras to create counterfeit money. Currently, dollar bills are predominantly green, but newer versions also include extra colors, such as pink, orange, or purple.

7

A $100,000 bill?

Have you ever seen a $500 or 1,000 dollar bill? What about a $100,000? Up until 1945, the U.S. Treasury printed $500, $1,000, $5,000, $10,000, and $100,000 notes , in addition to the values currently in use. These higher-value notes were mainly intended for bank and government use, but were sought by criminals as they made it easier to hide large amounts of money. Even though they were officially discontinued in 1969, these notes are still valid, though rare, and they have a high worth as collector's items.

8

No numbers

Unlike bills, American coins have different sizes and colors related to their value. Originally, gold, silver, and copper were used for coins, but modern coins are made of copper, zinc, or nickel. Besides their size and design, the value of each coin is printed in letters, not in numbers , alongside depictions of American presidents.

9

Liberty for all (the coins)

By law, all American coins must include six specific details : the word ‘Liberty’, the name of our country, the national motto "In God We Trust", the oldest American motto "E Pluribus Unum", the value of the coin, and the year. Each coin also includes a mint mark that shows where it was made: "P" for Philadelphia, "D" for Denver, "S" for San Francisco, and "W" for West Point.

10

A global currency

The American dollar is one of the most powerful currencies in the world, acting as a backbone for international trade and finances. It is estimated that two-thirds of the physical dollars in circulation are outside American territory. Besides the U.S. and its territories, eight sovereign nations have the U.S. dollar as their official currency, with several more accepting it as legal tender.

1

There's an unexplained billion-year gap

Look closely at the canyon walls, and you'll notice something strange: a clean, sharp line where ancient rock simply stops, and a much younger layer begins directly above it.

This geological puzzle is called the "Great Unconformity," and it represents over a billion years of rock layers that are simply absent , as though that stretch of time never happened. In some spots, rock dated 1.8 billion years old sits directly beneath rock that is only 520 million years old. Where did the missing billion years go?

The leading theory involves the violent breakup of an ancient supercontinent, but scientists are still piecing it together.

2

During the Cold War, it hid a nuclear fallout shelter

During the Cuban Missile Crisis in 1962, the U.S. government converted part of the Grand Canyon Caverns into a fallout shelter. This dry cave system, more than 200 feet underground, was stocked with enough food and water to sustain 2,000 people. Naturally, it was never occupied, and the supplies were never used.

The caverns have since been transformed into a tourist attraction, with organized tours winding through the same underground chambers that were once intended as a refuge from nuclear war. You can even book a night's stay there.

3

The Federal Aviation Administration was founded after a crash over the canyon

In 1956, two commercial passenger planes collided in midair over the eastern Grand Canyon, killing all 128 people on board both crafts. Rescue teams struggled to reach the wreckage deep inside the canyon, and the extreme heat of the crash had caused the planes' aluminum to fuse with the bedrock. There were no survivors.

The disaster exposed a terrifying truth: the U.S. air traffic control system was dangerously outdated, relying on pilots' visual estimates and rough guesswork from controllers , with no way to separate fast-moving aircraft from slow ones, or instrument-flying planes from those navigating by sight. Congress responded by passing legislation that created both the Federal Aviation Administration (FAA) and the National Transportation Safety Board.

4

A hoax suggested that an Egyptian civilization had lived there

In 1909, the Arizona Gazette reported that an explorer named G. E. Kinkaid had discovered a vast underground citadel inside the canyon, filled with artifacts linked to ancient Egyptian civilization. He even claimed the expedition had been funded by the Smithsonian.

This story described hieroglyphics on the walls, mummies in the chambers, and relics pointing to a direct connection with the Egypt of the pharaohs. It was incredibly detailed, and it was, of course, a hoax. No evidence for any of Kinkaid's claims ever surfaced.

5

Fewer than 100 people have ever hiked its full length

Among the few people who have completed the through-hike of the Grand Canyon is Jen Hogan, the first woman to accomplish it, finishing her journey in 2021–2022.

It’s a full 800-mile length below the rim. The route involves extreme heat, flash floods, near-impassable areas, and stretches with no water or trail whatsoever. Around 60 or 70 people have reportedly accomplished it. This makes it one of the most exclusive feats on Earth.

6

The Grand Canyon's rocks predate dinosaurs entirely

Visitors scanning the canyon walls for fossils are often surprised to learn they won't find any dinosaur bones here. The rock layers of the Grand Canyon are simply older than dinosaurs. This fact alone can be shocking: staring at its walls means staring at marine fossils from as far back as 1.2 billion years ago. Some of its caves hold the remains of ancient mammals. The canyon is a window into a world that existed long before the dinosaurs, when the land that is now Arizona lay beneath a shallow sea.

7

The park is bigger than Rhode Island

Numbers alone rarely capture the Grand Canyon's scale, so here's a different approach. Rhode Island covers about 1,214 square miles, and the Grand Canyon National Park spans 1,904 square miles.

The canyon's depth exceeds four Empire State Buildings (which is 1,454 feet) stacked on top of one another. That’s 6,093 feet at its deepest point.

8

But it's not the deepest canyon on Earth

For all its grandeur, the Grand Canyon does not hold the depth record. Pictured above, the Yarlung Tsangpo Grand Canyon in Tibet, China, plunges to 17,567 feet, which is nearly three times deeper. Carved by the Yarlung Tsangpo River as it cuts through the eastern Himalayas, that canyon is so remote and extreme that it remained largely uncharted until the late 20th century.

9

It is home to a pink rattlesnake found nowhere else on Earth

The Grand Canyon Pink Rattlesnake has a pinkish-red coloring that matches the canyon's own distinctive rock walls so closely that it's nearly invisible. It is found nowhere else in the world. Officially classified as Crotalus oreganus abyssus , it has darker diamond-shaped markings along its back that deepen the camouflage further.

10

There's a village at the bottom: Supai Village

For over 1,000 years, the remote village of Supai has been home to the Havasupai Tribe, the People of the Blue-Green Waters. It is located an eight-mile hike from the rim, but sits roughly 3,000 feet deep inside the Grand Canyon.

The U.S. Department of Agriculture has called it the most remote community in the contiguous United States, and it has no automobiles and no road access. The only ways in are on foot, by mule, or by helicopter. It is also the only place in the United States where the postal service still delivers mail by mule train.