1

Smuggled sandwich

Image: Gennady Zakharin

During the Gemini 3 mission, astronaut John Young secretly brought a corned beef sandwich into space . He and fellow astronaut Gus Grissom took a few bites while in orbit.

Needless to say, Mission Control wasn’t amused—there were serious concerns about crumbs floating around and interfering with the spacecraft’s systems.

2

A gorilla in the ISS

Image: Amy Reed

Astronaut Scott Kelly pulled off a wild prank during his year in space by dressing in a gorilla suit and chasing fellow astronaut Tim Peake around the International Space Station.

The costume had been secretly sent by Scott’s twin brother, Mark Kelly, as a surprise birthday gift during the mission.

3

Lunar picnic

Image: Lucie Capkova

In 1969, Neil Armstrong and Buzz Aldrin made history as the first humans to walk on the Moon. But they didn’t stop there.

To mark the occasion, they also shared the first meal on the lunar surface . The menu included bacon squares, peaches, sugar cookie cubes, a pineapple-grapefruit drink, and coffee.

And unlike the smuggled corned beef sandwich incident, this meal was entirely mission-approved.

4

Fined by Mars "owners"

Image: Planet Volumes

In 1997, NASA was sued by three men from Yemen who claimed that Mars had been passed down to them by their ancestors.

They accused NASA of trespassing when the Pathfinder rover landed—and even began selling plots of Martian land for $2 per square meter. Of course, the case was never taken seriously.

5

Metric vs. Imperial

Image: Bozhin Karaivanov

Back in 1999, NASA lost a Mars orbiter due to a mix-up between metric and imperial units. One team used the metric system, while another used imperial units to track thruster force.

The error caused the spacecraft to veer off course and burn up in the Martian atmosphere. It had been intended to be the first satellite to study Mars's climate and weather in detail.

6

Another fine—for littering

Image: Attila Lisinszky

In 1979, NASA’s Skylab space station re-entered Earth’s atmosphere and broke apart, scattering debris across Western Australia, about 482 kilometers east of Perth.

In response, the Shire of Esperance , a local government body in Western Australia, jokingly fined NASA $400 for littering.

7

A building with its own weather

Image: reza shayestehpour

NASA’s Vehicle Assembly Building (VAB) at the Kennedy Space Center is one of the largest buildings in the world by volume, enclosing over 3.7 million cubic meters of space. It was originally built to assemble the massive Saturn V rockets used in the Apollo missions.

But its immense size—combined with Florida’s high humidity—once led to clouds forming inside . To prevent this, NASA installed a 10,000-ton air conditioning system to control moisture and protect delicate spacecraft.

8

Bathroom issues

Image: Jan Antonin Kolar

Early space missions didn’t have modern toilets—just plastic bags taped in place. During Apollo 10, this led to an awkward moment when a piece of human waste was spotted floating through the cabin .

Commander Tom Stafford asked for a napkin to grab it, but no one claimed responsibility. Minutes later, another one appeared. The crew laughed it off, but to this day, the mystery remains unsolved.

9

Mutiny in space

Image: Towfiqu barbhuiya

In 1974, the Skylab 4 crew spent 84 days in space—the longest mission at the time. Overworked and stressed, the astronauts staged the first space mutiny by taking a surprise day off and cutting communication with NASA.

They relaxed and enjoyed the view of Earth before resuming contact the next day. NASA wasn’t thrilled but learned a valuable lesson: space missions must care for astronauts’ mental health, not just their physical well-being.

10

Paid to stay in bed

Image: Kinga Howard

NASA once paid volunteers $15,000 to lie in bed for 90 days to simulate the effects of zero gravity on the human body.

It sounds like a dream job (pun intended)—until you realize they weren’t allowed to get up at all, not even for a second.

11

No insurance

Image: Vlad Deep

Before Apollo 11 launched, the crew couldn’t get life insurance due to the mission’s high risks . So Armstrong, Aldrin, and Collins came up with a clever backup plan.

They signed envelopes and postcards, which friends postmarked during the mission. If the astronauts didn’t return, their families could sell them to collectors for financial support.

1

Area 51

Image: Michael Herren

Location: Nevada

Shrouded in secrecy, this military base has become synonymous with UFOs and government cover-ups. Its official purpose was testing aircraft like the U-2 spy plane and Stealth Bomber, but its classified nature fueled decades of wild speculation, ranging from secret weapons to actual aliens working for the government.

2

Coral Castle

Image: Audric Wonkam

Location: Florida

This massive stone structure was built by a single man, Edward Leedskalnin, using enormous limestone blocks—some weighing 30 tons. According to him, no heavy machinery was ever used during the construction, and he even claimed to know the secrets of the pyramids . To this day, engineers and historians debate how he moved and placed those stones with such precision.

3

Skinwalker Ranch

Image: Jacob Padilla

Location: Utah

This 512-acre property has long been at the center of UFO sightings, cattle mutilations , and alleged portals to other dimensions. The stories were so compelling that, in the ’90s, a private research organization purchased the ranch to try and make some scientific sense of the claims, conducting extensive field studies. However, after nearly a decade of research, they found no conclusive evidence.

4

Mammoth Cave

Image: Ksenia Kudelkina

Location: Kentucky

The world’s longest known cave system has its fair share of unexplored tunnels, ghost stories, and strange air currents. More than 400 miles have been mapped , yet many passages remain uncharted. Researchers have yet to fully understand the cave’s underground ecosystem, and new chambers are still being discovered today.

5

The Marfa Lights

Image: Alexandra Vo

Location: Texas

Reported since at least the late 19th century, floating orbs of light have been seen near this small town with no consistent explanation. Night watchers continue to gather at designated viewing areas along Highway 90, hoping for a glimpse. While scientific studies suggest that distorted car headlights are the most likely cause, many remain convinced otherwise.

6

The Devil’s Kettle

Image: Andrew Ling

Location: Minnesota

This unusual waterfall splits in two—one half flows normally, while the other vanishes into a deep pothole with no known exit. Scientists poured dye, ping-pong balls, and even GPS trackers into the mysterious hole, all to see where the water ends up. While researchers eventually confirmed it rejoins the river underground, exactly how and where remained elusive for decades.

7

Cahokia Mounds

Image: pcrm Dorego

Location: Illinois

Built centuries before Columbus arrived in the Americas, the ancient city of Cahokia featured massive earthen mounds, wooden palisades, and likely formed part of complex trade networks across the continent. Despite having a population rivaling London in the 1200s, according to archaeologists, the city was mysteriously abandoned in the span of a few years. No written records explain its decline, though environmental stress, resource shortages, and internal social factors are often cited as possible causes.

8

Blythe Intaglios

Image: Alexander Schimmeck

Location: California

Similar to Peru’s Nazca Lines, these giant geoglyphs are etched into the desert floor, seemingly visible only from the sky. Created by scraping away dark rocks to reveal lighter earth beneath, the figures are believed to be between 450 and 2,000 years old, depending on the specific design. While their exact purpose remains a mystery, they are believed to have had a ceremonial function.

9

The Spooklight

Image: Ben Griffiths

Location: Missouri-Oklahoma Border

Also known as the Hornet Spooklight, this floating orb has been seen since at least the late 19th century. It appears along a rural stretch of road near the small community of Hornet, Missouri, and Quapaw, Oklahoma. While some theorize it could be caused by car lights from miles away, some sightings predate automobiles.

10

Roanoke Island

Image: Stephen Crane

Location: North Carolina

In the 1580s, an entire colony vanished overnight, leaving behind only the word "Croatoan" carved into a tree. No graves, no remains—just an eerie disappearance that sparked centuries of theories, from disease and starvation to assimilation with local tribes. Modern archaeology uncovered European artifacts at sites associated with Native groups miles away, but no definitive evidence has ever solved the mystery.

1

Rabies

Image: Samuell Morgenstern

Rabies-infected people and animals cannot swallow water. This is why rabid dogs drool at the mouth, because they are unable to swallow.

In the ancient world, a "cure" for rabies involved forcibly submerging people in bodies of water to force the liquid intake . Quite often, the consequence, as you might have guessed, was death by drowning.

2

Bloodletting

Image: David Trinks

In the days when barbers were also designated surgeons, bloodletting was a common cure for multiple conditions. This gruesome technique was performed not just using surgical tools but also by using leeches , which were directly applied on the human body , to suck blood out of the wretched individuals who required treatment.

3

Madstones

Image: Atul Vinayak

Folk remedies were common in a time when seeking professional medical help was a luxury for most people. Popular in mid-19th-century America, madstones were big hairballs extracted from the guts of goats and deer .

These objects were believed to possess medicinal properties, such as curing rabies and serving as an antidote to various poisons.

4

Chloroform

Image: Carlos Felipe Ramírez Mesa

Many substances that we now recognize as poisonous were once believed to be beneficial to health. During the 19th century, chloroform was commonly used as an anesthetic in surgeries .

However, later studies revealed that long-term exposure to chloroform could cause liver and kidney damage, respiratory depression, and may even increase the risk of cancer.

5

Arsenic

Image: Denise Chan

Another poisonous substance once thought to be beneficial was arsenic, which was used to treat malaria, syphilis, and other ailments during the 19th and early 20th centuries.

However, it was later discovered that arsenic exposure could lead to poisoning, causing severe health complications and even death.

6

Mercury

Image: Benjamin Hibbert-Hingston

Similar to chloroform and arsenic, mercury was once thought to be beneficial to the human body. However, as scientific understanding advanced, its harmful effects became widely known .

Today, we know that mercury is highly toxic and can cause severe damage to the kidneys and nervous system.

7

Urine

Image: Fotografía de Alimentos

Drinking urine for medicinal purposes was common in ancient Egypt, Greece, and Rome, where it was believed to have therapeutic benefits and was used as a remedy for various health conditions, including kidney and liver problems .

8

Trepanning

Image: Mathew Schwartz

Trepanning, a common medical practice in ancient civilizations, involved drilling a hole in the skull to relieve pressure or treat a variety of medical ailments such as headaches, seizures, and mental disorders .

However, due to the lack of modern anesthesia and surgical tools, the procedure was extremely dangerous and carried significant risks.

9

Cupping

Image: Katherine Hanlon

Creating a vacuum on the skin using heated glass cups was a popular therapy for various conditions, including pain, inflammation, respiratory problems, and digestive disorders . While not a particularly harmful technique, aside from the markings left on the skin, its benefits have not been scientifically proven.

10

Mummy powder

Image: Narciso Arellano

In medieval times, it was commonly believed that "mummy powder" possessed healing properties. This substance was made from ground mummies obtained from Egypt and was thought to be particularly effective in treating wounds, headaches, and digestive issues .

11

Nightshade

Image: Georg Eiermann

Nightshade is a poisonous plant with soothing properties, which was used as a pain reliever as it can induce a state of calm in the user.

However, this plant is also highly toxic and can cause hallucinations, delirium, and even death if consumed in large quantities.

12

Tobacco

Image: Juano colombo

It might be hard to believe today, but back in the 1600s, schoolchildren were encouraged to smoke cigarettes , which were then thought to be disinfectants.

Cigarettes were also believed to be beneficial for both the lungs and the mind. Thankfully, we now know better.