1

C-3PO ( Star Wars , 1977)

Few film robots are as easy to recognize as C-3PO. Introduced in Star Wars: A New Hope in 1977, this tall, golden droid was designed to handle translation and communication. Voiced in an unmistakable British accent by Anthony Daniels, his smooth metal surface, rigid stance, and gentle manner make his role in the story immediately clear. C-3PO appears in nearly every main installment of the franchise, and he was even made into toys and theme park attractions.

2

R2-D2 ( Star Wars , 1977)

Not all iconic robots speak in words. C-3PO’s companion R2-D2, first seen in Star Wars: A New Hope (1977), communicates through "beeps and whistles" rather than spoken language. He is a droid designed to assist with navigation, maintenance, and technical repairs. Within the story, he frequently carries information, fixes equipment, or helps characters escape danger. His "trashcan" shape is a masterclass in functional design, and his bravery as a "swiss-army-knife" repair droid made him arguably the most heroic character in the franchise.

3

T-800 ( The Terminator , 1984)

Is it human, or only pretending to be? When The Terminator was released in 1984, the T-800, played by Arnold Schwarzenegger in his breakout role, stood apart from earlier robots by appearing human. In fact, he’s more of a cyborg, since it combines an internal metal structure with external living tissue. Thanks to his appearance, he can move unnoticed among people, which is essential to his role in the story. Lines like "I'll be back" and "Hasta la vista, baby" are embedded in pop culture, making the T-800 one of the most iconic in cinema history.

4

Robby the Robot ( Forbidden Planet , 1956)

In 1956, long before sleek digital effects, Robby the Robot arrived on screen. His bulky metal body, exposed wiring, and clear dome head first appeared in the film Forbidden Planet . Robby can speak in full sentences, follow complex instructions, and perform tasks such as cooking, transporting people, and providing protection. After the film’s release, a similar aesthetic appeared in several television shows and movies. He was the first on-screen robot to have both a lovable personality and a complex design.

5

EVE ( WALL·E , 2008)

EVE’s design is iconic for its minimalism: she has no visible joints and no exposed mechanics. She first appears in Pixar’s 2008 animated film WALL·E . Her name means Extraterrestrial Vegetation Evaluator, and she has a limited vocabulary. Her smooth white exterior, compact shape, and floating movement make her very different from her older, more mechanical-looking predecessors. Despite her coldness, she eventually learns the warm emotions of love.

6

Dot Matrix ( Spaceballs , 1987)

With her metallic gold body, upright posture, and humanlike mannerisms, Dot Matrix, introduced in Spaceballs (1987), was designed to resemble a "protocol droid." Yes, she is a clear parody of _Star Wars_’ C-3PO, born from the genius mind of Mel Brooks. Voiced by Joan Rivers, Dot Matrix is famous for her "Virgin Alarm" and her role as a sarcastic, overprotective governess to Princess Vespa (Daphne Zuniga) rather than a technical aid.

7

RoboCop ( RoboCop , 1987)

RoboCop, played by Peter Weller, is introduced as a law-enforcement cyborg, combining human elements with heavy metallic armor. In the story, he carries out police duties such as patrol, investigation, and public order enforcement using advanced technology. The design—a silver-visored helmet and hydraulic movements— symbolized 1980s corporate greed and the loss of individual identity to the machine.

8

Johnny 5 ( Short Circuit , 1986)

Unlike the sleek EVE from WALL·E , Johnny 5 looks like a prototype, with exposed wires and tank treads. He is a small robot built for military testing, with large camera-like eyes and movable arms. After an accident alters his programming, he begins to act independently rather than following commands. He asks questions, observes everyday objects, and interacts closely with human characters. This combination of curiosity, humor, and a non-threatening appearance helped make Johnny 5 an icon of 1980s science fiction.

9

Gort ( The Day the Earth Stood Still , 1951)

Appearing in The Day the Earth Stood Still (1951), Gort is a seamless, 8-foot-tall silver sentinel who represents the terrifying potential of nuclear-age technology. He follows instructions precisely and does not engage in conversation with humans. In the film, his purpose is to enforce rules rather than explain them, acting only when necessary. His iconic "visored" eye that fires a disintegration beam and the phrase "Klaatu barada nikto" remain his enduring legacy.

10

Rachael (Blade Runner, 1982)

At first glance, Rachael (played by Sean Young) does not appear to be a robot at all. Introduced in Blade Runner (1982), she is an android created to blend into human society, with natural speech, human behavior, and no visible mechanical parts. Unlike earlier film robots, her design relies on appearance and memory rather than metal or machinery. In the story, she believes her memories and feelings are real. This focus on memory and identity, rather than physical ability or function, is why her role is still discussed in relation to artificial intelligence and what defines a human being.

1

Breaking a mirror

Image: Savannah B.

As we’ve all heard, breaking a mirror is said to bring seven years of bad luck— a belief that dates back to the Romans . They thought a mirror didn’t just reflect your face, but also your soul.

Because the Romans also believed that life renewed itself every seven years, the curse was thought to last exactly that long.

2

Walking under a ladder

Image: Nick Fewings

This superstition has its roots in medieval Europe, where ladders leaning against walls formed a triangle, a shape that symbolized the Holy Trinity .

Walking through it was seen as breaking the sacred shape and inviting misfortune. Today, most people avoid it not only out of superstition but also for simple safety.

3

A black cat in your path

Image: Emmeli M

In the Middle Ages, black cats were linked to witchcraft and were thought to be witches’ companions—or even witches in disguise. Crossing paths with one was considered dangerous .

Though many cultures view black cats as lucky, in the U.S., the old stigma has persisted.

4

Knocking on wood

Image: Glen Carrie

The habit of knocking on wood to ward off bad luck likely comes from ancient pagan traditions. Trees—especially oaks—were believed to house protective spirits .

Touching or knocking on wood was a way to call on those spirits for protection. The phrase and the action traveled across centuries, and now it’s a common phrase in everyday conversations.

5

Opening an umbrella indoors

Image: Kato Blackmore 🇺🇦

The superstition that opening an umbrella indoors brings bad luck originates from 18th-century England. Early umbrellas were large, stiff, and often had metal spokes.

Opening one indoors could cause injury or break household items , so the "bad luck" warning worked as a practical safety rule.

6

Friday the 13th

Image: Nik

Friday has long been considered unlucky in Christian tradition because it was said to be the day of the Crucifixion. The number thirteen was also viewed as ominous, connected to the Last Supper .

When the two were combined, Friday the 13th gained its spooky reputation. Despite rational explanations, some hotels skip floor 13, and many people still avoid major plans on that date.

7

Spilling salt

Image: ekaterina shishina

Salt was once precious and expensive, symbolizing purity and friendship. Spilling it was considered wasteful and unlucky in ancient times.

The practice of tossing a pinch over your left shoulder comes from folklore, supposedly to blind the devil lurking there . It’s a tiny gesture that still lingers on dinner tables today.

8

Four-leaf clover

Image: Barbara Krysztofiak

The four-leaf clover is a symbol of good fortune dating back to the Celts, who believed the rare leaves provided protection against evil spirits .

Since clovers typically have only three leaves, the fourth leaf came to symbolize rarity and luck.

9

Rabbit’s foot

Image: Timofei Adrian

Carrying a rabbit’s foot for luck traces back to African and European folklore, where rabbits were seen as fertile, magical creatures .

The superstition spread through American culture in the 19th century, especially in the South. Even though it might seem unusual—and potentially unsanitary—the lucky rabbit’s foot remains a well-known charm today.

10

Wishbone

Image: Museum of New Zealand Te Papa Tongarewa

The tradition of making a wish on a wishbone originates with the Romans, who, in turn, borrowed it from the Etruscans. They believed that birds held divine powers .

Breaking the bone with someone else was thought to transfer luck to the person who ended up with the larger piece .

11

Coin in a fountain

Image: Lila Mitchell

Tossing a coin into water to make a wish has its roots in ancient Europe. Wells and springs were considered sacred, often associated with gods or spirits.

People dropped coins as offerings for health or good fortune . Today, fountains across the U.S. and around the world collect millions of coins.

12

Wishing upon a star

Image: Ali

The superstition of wishing upon a star comes from ancient Greece and Rome, where falling stars were believed to carry messages from the gods .

Even today, looking up at the night sky and spotting a shooting star inspires many people to make a wish.

1

Grand Prismatic Spring

Image: MikeGoad

The steaming, multicolored circle of the Grand Prismatic Spring is one of the most hypnotic and unique sights in the U.S. Part of Yellowstone National Park, this hot spring is the largest in the country and the third-largest in the world, measuring 370 feet wide and 160 feet deep.

Its vibrant colors, ranging from deep blue in the center to fiery red and orange at its edges, are unlike anything we see in nature every day. Minerals and microbes are responsible for these hues, with water temperature causing the pigments to fluctuate . The spring owes its existence to geothermal activity driven by Yellowstone's underlying magma chamber and is located in the Midway Geyser Basin.

2

Fly Ranch Geyser

Image: Ken Lund, CC BY-SA 2.0

One of the reasons why Fly Ranch Geyser is unique in the world is that it was formed after a human accident . This technicolor geothermal geyser, located on the Fly Ranch property in the Hualapai Geothermal Flats of Washoe County, Nevada, wasn’t there before 1916.

In 1916, while drilling a well for irrigation in the area, workers struck near-boiling geothermal water, leading to the creation of the first geyser. Decades later, in 1964, a geothermal energy company drilled a second well nearby, which caused the emergence of the Fly Geyser we know today. It has been spouting water into the sky ever since, forming several cone-like vents atop a mound that continues to grow.

3

Devil’s Kettle

Image: chrishawaii

Where does the water from the Brule River go when it falls? For a long time, this was a mystery. Located in Judge C.R. Magney State Park near Grand Marais, Minnesota, along the North Shore of Lake Superior, the river is famous for its unusual split: one half flows downstream, while the other plunges into a seemingly bottomless hole .

This waterfall has baffled visitors and scientists for years because objects thrown into the "kettle," such as logs and ping-pong balls, appeared to vanish without resurfacing. This fueled theories of underground rivers or deep caverns beneath the falls. The mystery was solved recently when hydrologists discovered that the water entering the kettle resurfaces downstream . The kettle's strong currents explain why objects thrown in don’t resurface; they are broken apart and held underwater, functioning like a natural washing machine.

4

Mono Lake Tufa Towers

Image: Stephen Leonardi

These unique limestone formations, known as the Mono Lake Tufa Towers, emerge from the salty, alkaline waters of Mono Lake , fed by underwater springs. Located in eastern California, near the Sierra Nevada mountains and about 13 miles east of Yosemite National Park, they are a striking natural wonder.

These tufa towers rise dramatically from the water. How were they formed? Mono Lake has no outlet, so its high alkalinity and salinity caused minerals to accumulate over time. This unique environment supports an ecosystem of brine shrimp, alkali flies, and migratory birds. To give you an idea, the lake’s salinity is more than twice that of the ocean, which means you could float effortlessly in its waters, as many visitors do.

5

Crater of Diamonds

Image: Brett Sayles

If you find a diamond here, you get to keep it—this is the only diamond-bearing site in the world where that's possible. Open to the public for mining , the Crater of Diamonds is a 37.5-acre field located near Murfreesboro, Arkansas. It marks the eroded surface of a volcanic pipe composed of lamproite, a rare volcanic rock.

Visitors sometimes find diamonds of various colors, including white, yellow, and brown, along with other gems like amethyst and garnet. It was here that the "Uncle Sam Diamond" was found, the largest diamond ever dug out in North America, weighing 40.23 carats. Diamonds were first discovered here in 1906 when a local farmer found unusual crystals on his land, which sparked a minor diamond rush.

6

Antelope Canyon

Image: Roberto Lee Cortes

Rocks that look like flowing water: Antelope Canyon is a famous and breathtaking slot canyon in northern Arizona. It consists of two main sections: Upper Antelope Canyon (a.k.a. Tsé bighánílíní, or "the place where water runs through rocks") and Lower Antelope Canyon ( Hazdistazí, or "spiral rock arches").

The canyon was formed over millions of years as flash floods and desert winds eroded the Navajo Sandstone. Even today, seasonal flash flooding continues to shape and carve the canyon’s mesmerizing features. Its surreal, wave-like formations in shades of orange are a favorite subject for photographers and tourists from all over the world.

7

Petrified Forest

Image: Megan Clark

The Petrified Forest National Park in northeastern Arizona boasts one of the world's largest and most vibrant concentrations of petrified wood . The park, part of the Painted Desert, is located between the Apache and Navajo Counties.

Most of the wood found there is from ancient conifer trees that date back about 225 million years to the Late Triassic period. These trees were swept into river systems, buried by sediment, and transformed into stone through a process called permineralization . The park also features a wealth of fossilized remains of ancient animals, including early reptiles.

8

Devils Tower

Image: Kyle Petzer

The Devils Tower stands alone, protruding dramatically from the plains. Considered sacred by Native American tribes, it was originally called "bad god’s tower," a name that eventually evolved into its current form. Located in northeastern Wyoming, this igneous rock monolith soars 867 feet above its base.

It was designated the first U.S. National Monument by President Theodore Roosevelt in 1906. Geologists agree that Devils Tower was formed through the intrusion of magma into sedimentary rock layers about 50 to 60 million years ago. Today, climbers from around the world are drawn to its sheer walls, though climbing is prohibited in June to honor Native ceremonies.

9

The Wave

Image: Mark Nemenzo

The Wave is a visually stunning sandstone formation located in the Coyote Buttes North area of the Vermilion Cliffs National Monument. Known for its hypnotic, swirling bands of red, orange, and yellow, its delicate ridges are so easily damaged that even one misplaced footstep could ruin the beautiful patterns.

Approximately 185 million years ago, this area was a vast desert covered in dunes. Over time, layers of sand were deposited, compacted, and cemented, forming this Navajo sandstone shape. Unfortunately, The Wave is only accessible by a challenging hike that requires a permit, due to the fragility of its ecosystem and high demand from visitors. With less than 5% of applicants obtaining a permit each year, it is one of the most exclusive hiking destinations in the world.

10

Kasha-Katuwe Tent Rocks National Monument

Image: Bruce Warrington

The Kasha-Katuwe Tent Rocks National Monument, located in northern New Mexico, displays a unique landscape of tall, cone-shaped rock formations. These "tent rocks," composed of pumice and tuff, are known as "hoodoos." They are natural formations ranging from a few feet to approximately 90 feet tall.

The name "Kasha-Katuwe" means "white cliffs" in the Keresan language of the Cochiti Pueblo. Hiking trails, such as the Slot Canyon Trail, offer visitors the opportunity to explore the cones up close while walking through dramatic, narrow canyons.