1

Tiger salamander

Image: Anastasia Pirri

Meet the tiger salamander—one of the largest terrestrial salamanders in North America. While its size is certainly impressive, the tiger salamander also has other traits that make it stand out. Take its appearance, for example: its dark brown body with bright yellow blotches resembles tiger stripes, which is why it has such a peculiar name. But there's more! Unlike many other salamanders, this one spends much of its time underground, using its large, powerful limbs to dig.

Fun fact: Some states, like Colorado and Kansas, have named it their official state amphibian!

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Eastern Hellbender

Image: laura adai

Although the tiger salamander is impressively large, another salamander stands out for its huge size: the Eastern Hellbender.

Cryptobranchus alleganiensis alleganiensis is its scientific name (quite a mouthful, right?). It holds the title of the largest salamander in North America. In fact, it's sometimes nicknamed "snot otter" due to its large body and the slippery texture of its skin.

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Amphiuma

Image: Wolfgang Hasselmann

When you first see this creature, you might mistake it for a snake or an eel. But it's actually an amphibian—more specifically, an aquatic salamander known as the amphiuma. Its appearance, let’s just say, isn’t exactly what most would call "cute."

This unusual amphibian can grow up to 3 feet long! And while not immediately noticeable, it has tiny legs with only one, two, or three toes, depending on the species. Its limbs aren't very useful, but they do make the amphiuma look just a bit creepier.

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Colorado River Toad

Image: Crystal McClernon

The Colorado River Toad may not be the cutest or most dazzling creature out there, but it's certainly one of the most fascinating. Native to the southwestern United States, this amphibian is one of the largest toads in North America, but what sets it apart isn't its size. So, while it may look slow and harmless, this toad is capable of releasing a dangerous, highly psychoactive toxin that acts as a defense mechanism and can be fatal to many species, including dogs.

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Common Mudpuppy

Image: Tommy Bond

Now, it's time for an amphibian whose cuteness is one of its most distinctive features; even its name reflects that! We're talking about the Common Mudpuppy, an aquatic salamander that inhabits streams, rivers, ponds, and lakes. It's also one of the few salamanders that remain fully aquatic throughout their entire life. And that’s precisely why it sports a pair of large, red external gills on the sides of its head, giving it an almost 16th-century European look!

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Gray Tree Frog

Image: Aurora K

The small Gray Tree Frog inhabits the forests and woodlands of the eastern United States. And while it's true you might find it on trees and plants, its nickname isn't entirely accurate when it comes to color. Yes, it can be gray, but this amphibian has the ability to change its color to blend in with its surroundings! It also has another superpower: the ability to survive freezing temperatures. By producing a natural antifreeze, it protects its organs during cold conditions that most of us couldn’t begin to handle.

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Spotted Salamander

Image: Kristina Kutleša

As its name suggests, what distinguishes the Spotted Salamander is its shocking look. But beware, its mottled appearance isn't just for show. It also acts as a warning to ward off predators! If you've ever seen one in the wild, consider yourself lucky because although it’s fairly widespread, this salamander spends most of its time underground.

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Pacific Giant Salamander

Image: wallace Henry

If you venture into the mountainous regions of the Pacific Northwest, you might come face-to-face with the Pacific Giant Salamander, one of the largest terrestrial salamanders in North America.

Reaching up to 14 inches in length, this amphibian is striking to see—but it’s even more surprising when you hear it. That’s right: unlike most of its kind, the Pacific giant salamander can make audible barking sounds!

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Barking Tree Frog

Image: José M. Alarcón

We have a contestant that could go head-to-head with the Pacific Giant Salamander in a barking contest: the aptly named Barking Tree Frog.

Let’s just say the frog’s striking features are perfectly summed up by its name. In states like Florida, Georgia, and South Carolina, you can find this little amphibian calling from the treetops or near freshwater shores.

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Dusky Gopher Frog

Image: Geraldine Dukes

Finally, we have the most mysterious and elusive of all: the Dusky Gopher Frog. As one of the rarest frog species in the U.S., the Dusky Gopher Frog is incredibly elusive and critically endangered, with fewer than 200 individuals left in the wild. The dusky frog spends most of its life hidden underground and only comes out during the mating season.

1

Hedy Lamarr

Image: Geoffroy Berlioz

Best known for her 1930s–40s film career, Hollywood icon Hedy Lamarr also co-invented frequency-hopping spread spectrum technology to prevent enemy jamming in WWII. And if you think it’s no big deal, know it’s the basis for modern Bluetooth and Wi-Fi!

While largely overlooked as an inventor at her time, she was posthumously inducted into the National Inventors Hall of Fame in 2014.

2

Sybil Ludington

Image: Taylor Brandon

According to many historians, at just 16 years old, Sybil Ludington rode about 40 miles through the night in 1777 to alert American militia of a British attack on Danbury, Connecticut.

This would make her ride roughly twice as long as Paul Revere’s . While some scholars question the veracity of her story, a statue stands in her honor in Putnam County, New York.

3

Bass Reeves

Image: Pramod Tiwari

Born into slavery in 1838, Reeves became one of the first Black U.S. Deputy Marshals west of the Mississippi. He made over 3,000 arrests during his law enforcement career.

Many historians believe his exploits may have inspired the Lone Ranger character, although his name rarely appears in history textbooks.

4

Mary Edwards Walker

Image: David Trinks

A Civil War surgeon and suffragist, Walker treated soldiers on the front lines and was even captured as a prisoner of war.

In 1865, she became the first woman to ever receive the Medal of Honor. Her unorthodox dress style and fearless activism made her a striking figure in 19th-century America.

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Clara Barton

Image: Kevin Paes

Known as the "Angel of the Battlefield," Barton provided medical care during the Civil War and later founded the American Red Cross in 1881.

Though once a household name, her legacy has faded compared to other, more widely remembered wartime figures.

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Joshua Lawrence Chamberlain

Image: Chris Chow

A college professor turned Union colonel, Chamberlain famously held Little Round Top during the Battle of Gettysburg, a pivotal moment in the Civil War.

He was awarded the Medal of Honor and later became governor of Maine, but his unexpected battlefield brilliance is often overlooked in Civil War discussions.

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Robert Smalls

Image: Ian Hutchinson

In 1862, Smalls, a formerly enslaved sailor, seized a Confederate ship and delivered it to Union forces, securing freedom for himself and his crew.

He later served five terms in Congress, advocating for Black education and civil rights.

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Harvey Wiley

Image: Diana Polekhina

Known as the "Father of the FDA," Harvey Wiley was a chief chemist in the late 1800s whose "Poison Squad" tested various food additives, leading to the 1906 Pure Food and Drug Act.

This law laid the foundation for the FDA and led to the removal of many dangerous substances from consumer products. Notably, it prompted Coca-Cola to eliminate cocaine from its formula in the early 20th century.

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George Washington Carver

Image: Dan Meyers

More than just being associated with peanuts, George Washington Carver developed numerous innovative crop rotation methods and created over 300 uses for peanuts, sweet potatoes, and other plants to help Southern agriculture recover after the Civil War.

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Joe Medicine Crow

Image: Boston Public Library

The last war chief of the Crow Nation, Joe Medicine Crow, completed several traditional war deeds during WWII—including counting coup and stealing enemy horses —and earned both the Bronze Star and the French Légion d’honneur.

Part of his legacy was bridging Native American warrior traditions with modern military service, honoring both cultural heritage and patriotic duty.

1

The Real Huckleberry Finn

Image: Demure Storyteller

As mentioned earlier, Huckleberry Finn was, at least in part, based on a real person. Much of Mark Twain’s inspiration comes from his own life and experiences. Though Huckleberry Finn is a fictional character, his appearance, demeanor, and lifestyle closely mirror almost exactly Mr. Twain’s dear childhood friend, Tom Blankenship.

Huckleberry Finn first appeared in The Adventures of Tom Sawyer before becoming the central figure in his own story, The Adventures of Huckleberry Finn , a work widely regarded as a cornerstone of American literature.

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Education

Image: Johnny Cohen

Mark Twain’s intellectual achievements might suggest he was a highly academically educated individual, but that was not the case. He had to leave school at a very early age to help support his family after his father’s death.

After he dropped out of school, Twain began working at the Hannibal Journal , where his writing career would find its start. Always the avid reader, he was known to spend hours each evening in the library, immersing himself in books.

3

Steamboat pilot

Image: Andreas Haubold

In 1857, Mark Twain began his career as an apprentice steamboat pilot on the Mississippi River . Soon after, he recruited his younger brother to work on the vessel as well, but tragedy struck one day as he died from an explosion on the steamboat. Despite this heartbreaking event, Twain continued his training and earned his pilot’s license in 1859, working as a pilot until the outbreak of the Civil War.

In June 1902, he paid his final visit to the Mississippi River when he accepted an honorary degree at the University of Missouri in Columbia and participated in the dedication of a steamboat named in his honor.

4

Pen Names

Image: Patrick Fore

It is a well-known fact that Mark Twain, though a great name indeed, was not our hero’s real birthname which was Samuel Langhorne Clemens . Choosing a memorable pen name can be a lengthy process, and many authors experiment with a few before settling on one.

Before adopting the now-famous "Mark Twain," Clemens tested out some unusual pseudonyms, including "Epaminondas Adrastus Blab" and "Thomas Jefferson Snodgrass."

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Miner years

Image: Art Institute of Chicago

A man unafraid of trying new things, Mark Twain also worked as a miner in Nevada , where he and his brother fled, avoiding the Civil War. He later described the work as "hard and long and dismal."

His stint as a miner was short-lived, as he quickly landed his first writing job at The Territorial Enterprise newspaper in Virginia City. There he was tasked with covering crime, politics, culture, and, also, mining.

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19 cats

Image: Paul Hanaoka

A hardcore cat enthusiast, Mr. Twain was so fond of these felines that he even "rented" them to keep him company while traveling . At one point in his life, he reportedly had 19 cats at the same time.

When asked about this obsession, Twain replied that he found cats much preferable to humans, even going as far as saying, "If man could be crossed with the cat, it would improve man, but it would deteriorate the cat."

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Board game inventor

Image: Jaciel Melnik

Perhaps learning about English monarchs was a fun activity in the times of Mark Twain but, in any case, it served as the inspiration for a board game he invented and patented , called Memory Builder.

Memory Builder wasn’t Twain’s only invention. He also designed a self-adhesive scrapbook that works like an envelope and created an improvement in adjustable and detachable straps for women’s bras.

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Bed writer

Image: Annie Spratt

Some might think that working in bed all day would be extremely uncomfortable, especially due to posture. However, Mark Twain found it absolutely delightful, and it became his favorite place to work.

In his old age, Mark Twain was often photographed in his bed, smoking away a cigar or pipe while writing. Though he owned many houses throughout his life, he had only one favorite bed, which he kept with him until the end.

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Bad businessman

Image: Vasilis Caravitis

Being a great author doesn’t guarantee being successful in other things as well. Despite dabbling in many business investments, Twain’s financial endeavors were largely unsuccessful. He lost money in mining and technology ventures and even went bankrupt.

However, he always managed to make a comeback with his writing and his lectures, proving that his known talents were generous and reliable.

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Predicted his own death

Image: Frank Zinsli

In 1909, Mark Twain predicted that he would die when Halley’s Comet returned . This was because the last time the comet passed near Earth was the year of his birth. Unfortunately, he was right, and he passed away in 1910.

Twain's family was by his side when he died, and he was buried in Elmira, New York. The exact cause of his death remains a mystery to this day.