1

Too slow

Image: Milad Fakurian

If your computer suddenly starts running much slower than usual, this could be a virus infection giveaway, since viruses can cause a computer to perform significantly worse than usual by consuming a lot of resources .

2

Too hot

Image: Artur Solarz

If your computer's fan suddenly becomes unusually loud, this could be a virus warning. If this happens, the computer is being pushed to its limits by some software , possibly a virus, causing the CPU to heat up.

3

Increased random pop-ups

Image: KOBU Agency

Pop-ups are a common nuisance on the internet. However, if you notice a sudden increase in random pop-ups, it could indicate that your computer is infected with a virus. Some pop-up ads contain malware that, if clicked, can install itself on your computer and run without your knowledge. These pop-ups may appear as error messages, or even messages claiming your computer has a virus .

4

Repeated crashes and freezes

Image: Joshua Hoehne

A computer may crash or freeze when running a resource-intensive program or app. However, if it crashes or freezes frequently without any demanding programs running , it could be a sign of a virus infection .

5

Browser homepage changes

Image: Nathana Rebouças

A browser’s homepage should not change unless the user modifies it. At most, it may open a separate tab after an update, but it won’t alter the homepage. If your browser’s homepage unexpectedly switches to a different website , your computer may be infected with a virus .

6

Unknown programs

Image: KOBU Agency

An unknown program or app appearing on a computer could be an indicator of virus presence. A hidden virus may be launching programs that the user did not download .

7

Computer battery draining

Image: Roberto Sorin

As we’ve learned, viruses consume a lot of resources, and a computer’s battery is no exception . When a computer’s battery life quickly drops, this could mean a virus is running in the background and spreading to affect the system.

8

Missing files and corrupted data

Image: Markus Spiske

Missing or corrupted files can also indicate a virus infection on a computer. Heuristic viruses often target files, causing them to disappear or become unreadable . This not only disrupts the workflow but also poses a significant threat to personal and professional information, such as important documents, cherished photos, or critical work files.

9

Unfamiliar files and folders

Image: Cookie the Pom

Computer viruses not only make files disappear but also create files and folders to disguise their presence. Some viruses modify files on a computer by giving them almost identical names, allowing them to blend in with the rest of the documents.

10

Disabled security tools

Image: Ed Hardie

Antivirus programs and security tools are some of our best allies against computer viruses. That’s why, when a virus infects a computer, it often disables security features to make its job easier. Some viruses are specifically designed to disable security tools, giving them access to the computer’s data and private information. If an antivirus program has been disabled, it could be a sign that a virus has shut it down.

11

Unknown emails in the Sent folder

Image: Justin Morgan

Checking the Sent messages folder in one’s Inbox every once in a while is a smart thing to do. Some viruses gain access to a target’s contact list and send emails from their address , spreading malware to other recipients.

12

Unable to access the computer or accounts

Image: Simon Hattinga Verschure

A computer virus may completely block a genuine user’s access . If you realize that you can’t access your online accounts or your entire computer, this can be a sure sign that a virus is running on your computer.

1

Bodie, California

Image: Michael & Diane Weidner

This former gold-mining hub in the Sierra Nevada once boasted nearly 10,000 residents, dozens of saloons, and a reputation for being one of the wildest towns in the West. Today, it's preserved in a state of "arrested decay," meaning the buildings are maintained exactly as they were found, complete with dishes still on tables and goods still on store shelves .

The California State Parks system manages Bodie, which means it's well-maintained but authentically eerie. About 200 buildings still stand, including a church, schoolhouse, and that infamous red-light district (though considerably quieter now).

2

Jerome, Arizona

Image: Strange Happenings

Perched impossibly on Cleopatra Hill in central Arizona, Jerome has pulled off the ultimate comeback story. This former copper mining town was literally sliding down the mountain in the 1950s, but instead of becoming a pile of rubble at the bottom, it reinvented itself as an artist colony and tourist destination. Today, it's one of the few ghost towns where you can actually spend the night, grab dinner, and browse art galleries .

The town's steep streets are lined with buildings that seem to defy gravity, and many claim the place is seriously haunted: the Jerome Grand Hotel, a former hospital, supposedly has particularly active spirits. Whether you believe in ghosts or not, you'll definitely believe in the impressive engineering it took to build a town on a 30-degree slope.

3

Rhyolite, Nevada

Image: Dino Reichmuth

In 1905, this place exploded from nothing to a town of 5,000 people in just two years, complete with electric lights, a stock exchange, and even an opera house. Then the financial panic of 1907 hit, the mines proved less profitable than hoped, and by 1916, the lights went out for good.

What makes Rhyolite especially photogenic are the ruins themselves—massive concrete structures and the famous Bottle House, built entirely from beer and liquor bottles . The three-story bank building and the remnants of the jail are particularly impressive, showing just how convinced everyone was that this town would last forever.

4

St. Elmo, Colorado

Image: Arturo Rivera

Tucked in the Sawatch Range at 10,000 feet, St. Elmo is Colorado's best-preserved ghost town and one of the most visited. Founded in 1880 as a mining and rail hub, it once had a population of 2,000 people and all the amenities a Victorian-era miner could want.

What really sets St. Elmo apart is accessibility and atmosphere. It's an easy drive from nearby towns, and during the summer months, a few seasonal residents actually run the general store, selling snacks and souvenirs .

5

Bannack, Montana

Image: Donald Merrill

Montana's first territorial capital, Bannack, sprang up in 1862 after gold was discovered in Grasshopper Creek. Within a year, it had 3,000 residents and a serious problem with road agents (fancy term for bandits). The town's sheriff, Henry Plummer, turned out to be secretly leading the gang of robbers—one of the West's great scandals. After Plummer was hanged by vigilantes in 1864, Bannack settled down, but eventually, the gold ran out, and so did the people. The last residents left in the 1970s.

Now a well-preserved state park, Bannack features over 60 structures you can explore, including the hotel, church, schoolhouse, and Plummer's old jail . They even host a popular "Bannack Days" event each July with period costumes, demonstrations, and activities.

6

Grafton, Utah

Image: Arturo Rivera

This tiny Mormon settlement near Zion National Park has been featured in dozens of movies and commercials, most famously in "Butch Cassidy and the Sundance Kid." Founded in 1859, Grafton struggled with flooding from the Virgin River, conflicts with Native Americans, and general isolation. By 1944, the last resident had left, but unlike many ghost towns, Grafton's buildings were later restored and maintained by preservation groups.

Today, only a handful of structures remain—a schoolhouse, a church, and a few cabins—but they're set against absolutely spectacular red rock canyon scenery . The Grafton Cemetery, still maintained by descendants, sits on a hill with jaw-dropping views. It's free to visit, though donations are encouraged for preservation efforts.

7

Terlingua, Texas

Image: Glen Carrie

Once a thriving mercury mining town with 2,000 residents, it collapsed in the 1940s when the mines closed. Today, it's home to about 60 full-time residents, plus a rotating cast of artists, wanderers, and people who just couldn't handle civilization anymore.

The original townsite features impressive ruins of the Chisos Mining Company headquarters, a crumbling movie theater, and a cemetery with elaborate Mexican grave decorations . But the real attraction is the eccentric present-day community that's grown up around the ruins. You can stay in unique lodgings, eat at the famous Starlight Theatre, and experience some of the darkest night skies in the continental US.

8

Garnet, Montana

Image: Natalie Nicks

Located deep in Montana's mountains about 35 miles from Missoula, this gold mining town boomed in the 1890s with about 1,000 residents. The last 11 miles are on a rough dirt road that's impassable in winter, but that difficulty is exactly why Garnet remains so well-preserved and authentic. Casual tourists don't make the trek, which means you'll likely share the site with only serious ghost town enthusiasts.

About 30 buildings still stand, including the surprisingly intact Kelly's Saloon, complete with bar and furnishings . The Bureau of Land Management maintains the site and even offers rustic cabin rentals if you want to spend the night.

9

Centralia, Pennsylvania

Image: Megs Harrison

This isn't a Wild West mining town—it's a modern ghost town with an underground coal fire that's been burning since 1962 and could continue for another 250 years. At its peak, Centralia had over 1,000 residents. Today, fewer than five people remain in what's become one of America's most surreal abandoned places. The fire releases toxic gases through cracks in the ground, and the heat has buckled roads into impossible angles.

The most famous feature is the graffiti-covered section of abandoned Route 61, where smoke sometimes rises through cracks in the pavement . Most buildings have been demolished, but the street grid remains, marked by empty lots and crumbling foundations. It inspired the video game and film "Silent Hill," and it's easy to see why—the place feels genuinely otherworldly. Technically, Centralia is off-limits, and Pennsylvania has tried to discourage visitors due to safety concerns about the underground fire.

10

Calico, California

Image: Volodymyr Hotsyk

Founded in 1881 after a major silver strike, it boomed to 1,200 residents before the silver price crash killed it in the 1890s. Unlike other ghost towns on this list, Calico was reconstructed and restored as a theme-park-style attraction in the 1950s by Walter Knott.

Today, Calico is a San Bernardino County park with restored buildings, shops, restaurants, and even staged gunfights on weekends . You can tour a genuine silver mine, pan for "gold" (spoiler: you'll find some), and ride a narrow-gauge railroad. About half the buildings are original, and half are reconstructions, giving you the ghost town experience without the sadness of actual decay.

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.