1

Jackie Kennedy (1961–1963)

Jackie Kennedy brought elegance, culture, and a whole lot of style to the White House. But she was much more than a fashion icon : She led a historic restoration of the White House and made sure Americans saw it as a true national treasure through a famous televised tour in 1962.

Her poise during the devastating days following her husband’s assassination gave the country something to hold onto in a time of profound national grief.

2

Eleanor Roosevelt (1933–1945)

Eleanor Roosevelt completely redefined what a First Lady could be . She held press conferences, wrote a daily newspaper column, traveled the country during the Great Depression, and pushed her husband, Franklin Delano Roosevelt, hard on civil rights.

After President Franklin died, she kept going, serving as a U.S. delegate to the United Nations and helping to draft the Universal Declaration of Human Rights. Simply put, she is the gold standard of First Ladies.

3

Betty Ford (1974–1977)

Betty Ford was refreshingly honest for a First Lady. She spoke openly about her breast cancer diagnosis at a time when people barely dared to whisper the word, and her candor is credited with encouraging countless women to get mammograms.

After leaving the White House, she went public about her struggles with substance abuse and founded the Betty Ford Center, which has helped thousands of people get sober over the years. She turned personal hardship into public good .

4

Dolley Madison (1809–1817)

Dolley Madison turned the White House into a lively gathering place. She also used her dinner parties to help James Madison smooth over political feuds that might otherwise have blown up.

Her most famous moment was when the British invaded in 1814 and set the White House on fire, and Dolley stayed behind just long enough to save a portrait of George Washington .

5

Edith Wilson (1915–1921)

When President Woodrow Wilson suffered a severe stroke in 1919, Edith didn't just stand by his side: she basically ran the show . She controlled who could see the president, filtered his communications, and made key decisions about what information reached him. In a time when women couldn't even vote yet, Edith Wilson played a key role in keeping the nation afloat during her husband's sickness.

6

Mary Todd Lincoln (1861–1865)

Mary Todd Lincoln had one of the hardest roles any First Lady has ever faced: supporting a president through the Civil War while grieving the death of their son. She was sharp, opinionated, and deeply involved in her husband Abraham's presidency.

While she was often criticized during her time by political opponents, history has been kinder to her, recognizing that she was a complex, intelligent woman navigating an almost impossible situation.

7

Lou Henry Hoover

Lou Henry Hoover brought an intellect to the White House unlike almost any First Lady before her during Herbert Hoover's presidency (1929-1933). A Stanford-educated geologist who spoke five languages, she was an accomplished woman in her own right at a time when that was genuinely rare . When the Great Depression hit, she used her own personal funds to quietly help White House staff and struggling families, often anonymously.

Her most lasting legacy was her passionate dedication to the Girl Scouts of America. She championed the idea that young women deserved the same opportunities for outdoor education and leadership development as young men, and she funded troops in underserved communities. In 1933, she became the first First Lady to deliver a solo nationwide radio broadcast, using the platform to call on Americans to support their neighbors during the crushing hardships of the Depression.

8

Lady Bird Johnson (1963–1969)

Lady Bird Johnson championed the Highway Beautification Act of 1965 , a landmark piece of legislation that regulated billboards and junkyards along federal highways and promoted the planting of native wildflowers across the country. She worked closely with the National Park Service , helped establish or improve numerous parks and green spaces, and brought conservation to the center of the national conversation at a time when few politicians were willing to do so.

She also ran the White House with great skill and was a key behind-the-scenes supporter of Lyndon B. Johnson’s ambitious Great Society programs.

9

Abigail Adams (1797-1801)

Long before women had the right to vote, Abigail Adams was already telling her husband to "remember the ladies", and she meant it. She was one of the most politically engaged women of her era, writing sharp, witty letters to John that were basically unofficial policy memos.

She's often considered America's first truly political First Lady, and she was ahead of her time by about 150 years .

10

Edith Roosevelt

Edith Roosevelt transformed the role of First Lady during Theodore Roosevelt's presidency (1901–1909), turning it into something closer to what we recognize today. Edith created a formal staff, managed the White House's finances, and oversaw its major renovation in 1902 , which gave the building its now-iconic East and West Wings.

She was also a master of image control , carefully curating which photographs of her family reached the press and keeping the famously boisterous Roosevelt children from becoming a public relations liability. Behind closed doors, she was one of her husband Theodore's most trusted advisors, and many historians believe her steady judgment was a quiet but powerful force throughout his presidency.

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.