1

The horse diaper

Image: Lucia Macedo

Designed to catch manure in crowded cities—a problem once so severe that it shaped public infrastructure as well as the entrances to houses—the horse diaper was an invention meant to be strapped beneath working horses pulling carts and carriages.

The idea was to reduce disease and street filth during the horse-powered urban era. While the device saw limited use before automobiles rapidly replaced horses, similar designs are still occasionally used in modern veterinary practice.

2

The baby cage

Image: Taylor Flowe

Built as wire cages attached to apartment windows, so-called "baby cages" allowed infants to get fresh air when outdoor space was unavailable. Some models were guaranteed to safely hold over 30 pounds.

While alarming today and ultimately abandoned due to obvious safety concerns, the designs likely inspired some of the baby-proofing nets used today.

3

The pneumatic subway

Image: Eddi Aguirre

In the late 1860s, American entrepreneur and inventor Alfred Ely Beach set out to prove the feasibility of a human-sized pneumatic subway system beneath New York City, capable of moving both people and cargo using nothing more than air pressure.

The prototype was set up as a public attraction and carried passengers along a tunnel just over 300 feet long, from a station to a dead end. Despite its initial success, bureaucratic obstacles and high costs halted expansion, leaving it as a functional but largely forgotten underground experiment.

4

The mechanical horse

Image: Gabriel Tovar

Created for exercise and riding practice, the mechanical horse used a system of gears, cranks, and pedals to simulate walking and trotting motions while the rider sat in a saddle-like seat. It was marketed to urban riders and cavalry trainees who lacked access to stables or live horses.

Though bulky and impractical for widespread use, the device anticipated modern fitness machines by replicating real-world movements for conditioning and skill retention, rather than simple repetitive exercise.

5

The first metal detector

Image: Fer Troulik

After a failed assassination attempt on President James Garfield, Alexander Graham Bell hastily built an early metal detector in an effort to locate the bullet lodged in his body. The device functioned as intended, but it was unable to find the bullet because metal bed springs interfered with the signal.

Despite this setback, Bell’s early design proved the concept and directly influenced the development of modern metal detectors.

6

The pet-powered butter churn

Image: Matt Bero

In an inventive twist on animal-powered machinery, some 19th-century American farmers rigged small treadwheels for dogs, cats, or even goats to generate kinetic energy for churning butter. The animal ran inside the wheel, turning a rope or pulley connected to the churn.

While technically functional, the system was limited by the animal's willingness to cooperate and the small amount of power it generated.

7

The umbrella hat

Image: Claudio Schwarz

Robert W. Patten, often called the "Umbrella Man," patented one of the first commercially successful hands-free umbrella hats. It strapped a small umbrella directly to the wearer’s head, providing both sun and rain protection while keeping the hands free for work or walking.

His original design even included a mosquito net attached to the canopy. Patten didn’t enjoy much commercial success but became somewhat of an eccentric and comical popular figure, partly due to a series of comics that were inspired by his unusual invention.

8

The one-wheel motorcycle

Image: CJ Toscano

In 1971, American inventor Kerry McLean built and refined a monowheel—a one‑wheeled motorized vehicle in which the rider and engine sit inside the wheel’s circumference.

Since then, various attempts have been made to build on his original design, but it remains a niche vehicle used primarily for entertainment rather than practicality, as riders must be highly skilled simply to turn or even stay upright.

9

The first talking doll

Image: Holly Ward

In 1890, Thomas Edison embedded miniature versions of one of his most popular inventions —the phonograph—inside dolls so they could recite nursery rhymes.

While the idea was innovative, the technology was not yet there. The recordings were fragile, distorted, and often failed to work properly. The dolls were pulled from the market within weeks due to customer complaints, making it one of Edison’s rare commercial failures.

10

The glass harmonica

Image: Francesco Bovolin

Faithful to his eccentricity and inventive spirit, Benjamin Franklin redesigned the existing glass harp into a rotating spindle of glass bowls, played by touching the spinning rims with wet fingers, which he called the "glass harmonica."

The instrument produced eerie, sustained tones unlike anything else of its era. However, its fragile nature made it somewhat impractical, and the rotating mechanism posed a potential danger to the player if anything went wrong.

1

Boston, Massachusetts

The vast majority of Boston residents hold college degrees. With research-driven institutions like Harvard and Boston University, the city enables a rich academic environment that promotes learning, innovation, and scientific advancement in different fields. In addition, Boston's public schools and statewide educational standards rank among the best in the country!

2

Seattle, Washington

Seattle is definitely considered one of the smartest cities in the US! But why? Well, there are several factors. First, most of its population over age 25 (53.8%) holds a bachelor's degree or higher. And it's no surprise: Seattle is home to the University of Washington, one of the top-ranked universities in the world. In addition, the city is a tech hub, with one in five residents working in STEM fields (Science, Technology, Engineering, and Mathematics).

3

Chicago, Illinois

Chicago is a city everyone should experience at least once. Its rich cultural, intellectual, and innovative atmosphere secures its spot on this list. The city has a well-established education scene, with prestigious institutions like the University of Chicago and Northwestern University, and a high percentage of residents holding professional degrees in fields like law, medicine, and business. Plus, its smart use of technology to enhance life quality makes it stand out even more.

4

Atlanta, Georgia

Atlanta, Georgia, is succeeding in today's world thanks to its growing tech job market and fast internet speeds, making it an ideal place for anyone interested in science and technology. The city is also proud of its academic presence, with standout institutions like Emory University, Georgia Institute of Technology, and Georgia State University.

5

San Jose, California

If you're into technology, San Jose, California, might be your ideal city. As the heart of Silicon Valley, San Jose boasts an elevated number of highly educated residents: Over 26% hold a graduate or professional degree. It's also home to tech giants like Apple and Google, making it a hub of innovation and opportunity.

6

Durham-Chapel Hill, North Carolina

The metropolitan area composed of Durham and Chapel Hill in North Carolina is part of the renowned Research Triangle, named for the three major research universities in the region: Duke University, UNC Chapel Hill, and North Carolina State University. A significant portion of residents in this region hold graduate degrees, particularly in fields like medicine, science, and technology.

7

Boulder, Colorado

Sustainability, innovation, and education are top priorities in Boulder, Colorado. The city has been recognized for its commitment to the environment, including a bold goal of reaching 100% renewable energy by 2030. On top of that, Boulder was highlighted by Forbes as a major "intellectual center," ranking among the US cities with the highest percentage of residents holding a bachelor's degree or higher.

8

Austin, Texas

With over 19% of its residents holding a professional degree, Austin, Texas, has earned its spot on the list. In addition to the prestigious University of Texas fueling its educated population, Austin also has a rapidly growing tech industry. Its young, creative, and highly skilled workforce makes the city stand out even more.

9

Ann Arbor, Michigan

Thanks to its high concentration of highly educated residents, Ann Arbor, Michigan, regularly earns a spot on the list of the smartest cities in the United States. Much of that reputation comes from the University of Michigan, a major science, research, and tech hub, and the city's overall high level of educational attainment.

10

Washington, DC

Washington, DC, also ranks as one of the smartest cities in the country thanks to its high concentration of highly educated professionals, policy experts, and researchers. The capital city also boasts one of the highest graduation rates nationwide. From the Smithsonian Museums and the Library of Congress to the Kennedy Center and the National Archives, the city offers endless opportunities to enrich your cultural experience.

1

We Didn’t Start the Fire

Image: Dane Deaner

Although Billy Joel is one of America’s favorite songwriters, he is often very vocal about pointing out the flaws he finds in his early hits. He even found fault with the timeless " Piano Man, " which earned him his nickname, due to a melody he finds repetitive and lyrics he compares to limericks.

He assures that he doesn’t hold grudges against his own songs, but he did point out that he thought the melody of "We Didn’t Start the Fire" was "terrible" and compared it to a dentist’s drill . He says the only redeeming quality of that song is the lyrics—those famous rapid-fire lists of historical events from the ‘40s to the ‘80s.

2

Shiny Happy People

Image: Nathan Dumlao

R.E.M. created "Shiny Happy People" with a satirically overly positive tone . It was a hit back in the ‘90s upon its release, but it always remained a bit of an oddball in the band’s otherwise more introspective and serious records.

The cheerful tune has been quoted endlessly in movies and TV shows. Even the sitcom Friends considered making it its theme song! But singer Michael Stipe expressed little love for what he called "a bubblegum pop song." Stipe went as far as to say that he "hates" the song and sees it as a fluke rather than a reflection of the band’s work. Although other members are less critical, the consensus is that "Shiny Happy People" is not R.E.M.’s proudest achievement.

3

Smells Like Teen Spirit

Image: Firmbee.com

Nirvana’s breakthrough hit, "Smells Like Teen Spirit," is often credited with launching the grunge movement and bringing alternative rock into the mainstream. The song's catchy riff and cryptic lyrics became an anthem of frustration and angst in the youth of the ‘90s. But Kurt Cobain, Nirvana's frontman, quickly grew to resent the famous song.

In a 1993 interview, staying true to his grunge persona, Cobain declared: "I can barely, especially on a bad night, get through ‘Teen Spirit.’ I literally want to throw my guitar down and walk away." He said he felt the song was too "mainstream" and polished, and nothing like the gritty authenticity he had envisioned for Nirvana—something that shone through in the band’s less popular work.

4

What’s Love Got to Do with It

Image: Pixabay

"What’s Love Got to Do with It" was first offered to Donna Summer, but it was Tina Turner who made history with it in the ‘80s. Initially, though, she thought it wasn’t the right track for her. She once confessed: "I didn’t like it at first. It was a pop song. I’m a rock ’n’ roll singer. "

However, her manager convinced her to record it. Her reluctance was such that she only did a few takes of it, convinced it would be a filler track in her album. We now know how wrong she was. The hit ended up redefining her career, so successful that it inspired the title of her 1993 biographical film, starring Angela Bassett as her.

5

(You Gotta) Fight for Your Right (to Party!)

Image: Colourblind Kevin

You would think that the satirical tone of this song would be obvious. It’s not hard to tell that the flatly yelled-out lyrics about hard-partying youth were poking fun at the frat culture of the time. But the joke went over many people’s heads, and it became an anthem of sorts for the culture it meant to make fun of.

This irritated the Beastie Boys, particularly because the song became their breakout hit. Band member Adam Yauch explained that the whole song was "a joke that got out of hand." They felt the song misrepresented their style, which is why they avoided playing it live in later years.

6

Strangers in the Night

Image: Ethan Rougon

Frank Sinatra did not shy away from expressing his distaste for one of his biggest hits. He disliked "Strangers in the Night" from the start, explaining to the writer that he didn’t like the lyrics and requesting that they be changed. But the process was rushed, and he had to record the version as it was. It became an instant award-winning, chart-topping hit.

Still, the singer despised it. He reportedly muttered disparaging comments about it during live performances. People speculated that his famous addition of the scat "doo-be-doo-be-doo" was a spontaneous attempt to add some grace to a song he was so tired of.

7

Dream On

Image: Rombo

"Dream On" was a major hit for Aerosmith and helped the band’s career skyrocket in the ‘70s. It was written by lead singer Steven Tyler long before Aerosmith had formed or signed any record deal: He was 18 years old when he finished writing it. But years later, after the band recorded it, guitarist Joe Perry, in his words, "wasn’t crazy about it" for a long time.

He mentioned in interviews that the song was too soft and slow compared to the rock music he wanted to be playing. He admitted that he would have preferred that the band triumph with a more hard-core rock song, but wasn’t too sad about it, because, as he said, "a hit is a hit."

8

Under the Bridge

Image: Roberto Nickson

"Under the Bridge" is a soft, personal song that stands out in the repertoire of Red Hot Chili Peppers. According to the legend, the album’s producer discovered lead singer Anthony Kiedis’ poem about walking around L.A. when he was feeling down. The producer insisted that the lyrics were worthy of a song, and soon the whole band helped finish arranging it.

But Kiedis wasn’t so excited about sharing such an introspective song. In his memoir book, he shared that sharing such an intimate, contemplative song made him feel vulnerable, and felt it was too personal to perform on stage. This caused the band some trouble over the years, as fans always had something to say when the band skipped the song during performances.

9

Where Did Our Love Go

Image: Angelina Yan

Before "Where Did Our Love Go" was released, The Supremes were struggling to break into the mainstream. Their label had started referring to them as the "no-hit Supremes." To make matters worse, the trio didn’t like this particular low-energy song and thought nothing would come of it. But the relatable lyrics, amped by Diana Ross's lead vocals, transformed the song into a No. 1 hit on the Billboard Hot 100.

Before this, the group was used to performing upbeat, high-energy songs, like "Buttered Popcorn" or "I Want a Guy." In comparison, their first hit had a subdued tempo and a different identity. But, as producers had expected, the song worked. The Supremes went on to become the best-charting female group in history!

10

Sweet Child O’ Mine

Image: Jay Wennington

"Sweet Child O’ Mine" was written by Guns N’ Roses' lead vocalist Axl Rose about his then-girlfriend Erin Everly. The song was originally created from a simple guitar riff by Slash, which he had come up with during a jam session. It went on to become a No. 1 hit on the Billboard Hot 100.

But guitarist Slash was never a huge fan of the song. He admitted that his famous riff was okay, but that the whole song felt like it belonged to another band’s style, not theirs. Of course, the general audience loved it and it became a huge hit compared to their hard rock songs. Over time, though, Slash grew to love it because of the immense impact it had on Guns N’ Roses’ career.