1

Home economics class

Home economics as a school subject peaked in the mid-20th century, teaching sewing, cooking, and budgeting —often aimed at girls.

By the 2000s, however, many states had folded it into a broader "family and consumer sciences" category, as shifting gender roles and changing cultural habits made the old curriculum feel increasingly outdated.

2

Woodshop in every school

Lightly supervised children with access to power tools? Today, it seems hard to believe, but woodshop was a standard industrial arts course throughout the 1950s–1980s.

Declines began in the 1990s due to higher liability insurance costs, budget cuts, and a growing emphasis on college-prep academics over practical skills. Some schools still maintain limited woodworking programs, often using them as hands-on, integrated learning tools.

3

The dodgeball era

Dodgeball dominated physical education classes well into the 1990s, often using hard rubber balls that were notorious for causing stingers, bruises, and occasional injuries . The game was popular because it required little equipment, could fill an entire class period, and kept large groups of students active.

By the 2000s, however, concerns about safety and bullying led many districts to restrict or replace dodgeball with more structured team sports. Some schools still play modified versions, usually with soft foam balls and strict rules.

4

Chalkboard dusting

For over a century, green and black chalkboards were the centerpiece of American classrooms, with students regularly assigned to "clap out" erasers outside to clear the built-up dust. Chalk was cheap, durable, and easy for teachers to use in large rooms.

By the 1990s, districts began replacing chalkboards with whiteboards due to dust concerns linked to asthma and indoor air quality. The shift accelerated as overhead projectors, digital displays, and interactive whiteboards provided cleaner surfaces and reduced inhalation hazards.

5

Daily milk breaks

Mid-morning milk breaks became common in American elementary schools after the USDA expanded dairy subsidies through programs like the Special Milk Program in 1954. For decades, students lined up for small cartons—usually whole milk—intended to boost childhood nutrition and support U.S. dairy producers during periods of surplus.

By the 1990s and 2000s, milk breaks declined as updated nutrition guidelines shifted schools toward broader meal programs rather than standalone milk service.

6

In-school smoking lounges

The idea of teens openly smoking on school grounds would be almost unimaginable under today’s health and liability standards. But through the 1960s and into the early 1980s, many American high schools—especially in the Midwest and Northeast—maintained designated smoking areas for students.

The practice disappeared quickly as federal and state regulations tightened, beginning with widespread adoption of indoor smoking bans in the late 1980s and early 1990s. The 1994 Surgeon General’s report and anti-tobacco campaigns further pushed districts to eliminate student smoking sections altogether.

7

Daily cursive drills

For most of the 20th century, daily cursive drills were a nonnegotiable part of American schooling , often reinforced by specific handwriting manuals. Teachers devoted significant class time to perfecting loops, slants, and connected strokes, because cursive was considered essential for legibility, speed, and personal discipline.

The decline accelerated after the rollout of the Common Core State Standards in 2010, which omitted cursive entirely in favor of keyboarding and digital literacy benchmarks. With shrinking instructional time, cursive was often one of the first skills removed from early-grade schedules.

8

Class pet enclosures

From the 1960s through the 1990s, class pets—hamsters, guinea pigs, turtles, goldfish, and even the occasional lizard—were staples of American elementary classrooms. Teachers used them to teach responsibility, empathy, and basic biology , and many classes created rotating "pet helper" charts for feeding and tank cleaning.

Today, the idea of a live animal in a crowded classroom, handled daily by students, feels out of step with modern safety, allergy, and sanitation standards. Maintenance costs, humane-treatment rules, and the challenge of caring for animals during breaks led schools to retire these longtime classroom mascots.

9

Student hall monitors

For much of the mid-20th century, student hall monitors were a fixture in American schools. Selected students—often upper-grade or high-performing—wore badges or sashes and were tasked with checking hall passes, reporting loitering, and keeping noise down between classes.

By the 1990s, the role faded as schools adopted professional security staff, stricter attendance protocols, and legal liability rules that made peer enforcement impractical. As districts invested in cameras, campus supervisors, and centralized discipline systems, the traditional hall monitor quietly disappeared from most American schools.

10

Morning physical calisthenics

From the 1950s through the early 1970s, influenced by Cold War fitness campaigns, many American schools began the day with school-wide calisthenics —jumping jacks, toe touches, and arm circles—led over the PA system.

The practice faded as schedules tightened and PE moved into dedicated class periods, with research favoring structured fitness over brief daily routines. Today, the idea of entire schools performing synchronized drills feels almost militaristic.

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.