3 men lived on top of a billboard in tents for almost 9 months

During WW2, there was a special unit of men dubbed the ‘Ghost Army’. The unit was made of artists, creative and engineers and their job was to create deception about the enemy. From inflatable tanks to phony convoys to scripted conversations in bars intended to spread disinformation, they used all possible tricks to fool the enemy.

For years, scientists didn’t know what caused mysterious cave networks in South America. In 2010, they learned that the caves were actually tunnels dug by ancient giant sloths

The Arabia was a steamboat that sank in the Missouri River in 1856. Over time, the river shifted 800 meters to the east, eventually turning the site of the sinking into a field. The steamboat remained under 45 feet of slit and topsoil until 1988, when it was excavated. The mud, as it turned out, was such a great preserver that most of the artifacts on board were found to be intact. They even found jars of preserved apples that were still edible!

Thomas Baker instructed his team to leave him with a pistol and eight bullets propped up against a tree after he was injured. Later, American troops discovered the now-deceased Baker in the same location, lying next to eight dead Japanese soldiers and carrying an empty pistol.

In 1891, Chicago challenged engineers to create a structure to surpass the Eiffel Tower for the World's Columbian Exposition. George Washington Gale Ferris jr. responded with the original Ferris Wheel, a giant rotating structure elevating visitors above the city. This invention became an iconic attraction at the fair.

Marion Stokes, a Philadelphia woman began taping whatever was on television in 1979 and didn’t stop until her death in 2012. The 71,000 VHS and Betamax tapes she made are the most complete collection preserving this era of TV. They are being digitized by the Internet Archive.

American environmental activist Julia “Butterfly” Hill lived in a 1500-year-old California Redwood tree for 738 days to prevent it from being cut down by the Pacific Lumber Company. The Simpson’s episode “Lisa the Tree Hugger” was inspired by Hill’s story.

In the 1980s, an Indian man spent 72 hours in a glass cabin with 72 snakes, some of which were extremely venomous. His aim was to prove that snakes only attack when provoked. Remarkably, he was not bitten once in those 72 hours and even set a Guinness World Record in the process.

We are all aware that medicine has advanced dramatically over the last fifty years. There are several modern medical approaches available today, but this was not always the case. However, the past of medicine is a dark one. Medical leeches, lobotomy, vascular surgery, cranial stenosis, and even electroshock therapy are all options. These are only a couple of the cruel healing techniques that are still in use today.

Nathan "Nearest" Green was an African-American head stiller who is now more frequently referred to as a master distiller. He was renowned for imparting his distilling knowledge to Jack Daniel, the creator of Jack Daniel's Tennessee whiskey distiller, after Jack Daniel was freed from slavery following the American Civil War.

During WWII, a German captain and an engineer flushed the submarine's high-tech toilet incorrectly, causing the vessel to rapidly fill with water. British planes patrolling the sea attacked them as the submarine was brought to the surface. While many members of the crew were killed in the attack, the captain escaped!

Henry Ford was the first Industrial Giant to give his employees both Saturday and Sunday off in the hope of encouraging more leisurely use of automobiles and thus popularizing the concept of the "weekend."

After Kansas mill owners found women reused flour sack materials into apparel in the 1920s and 1930s, they started applying patterned designs to give families with more fashionable patterns and material.

The ancient Egyptians used a pregnancy test that involved potentially pregnant women peeing on barley and wheat seeds. Plant growth indicated pregnancy: barley for a boy and wheat for a girl. Later tests revealed that pregnant women's urine causes plant growth 70% of the time, whereas non-pregnant women's urine does not.

Before alarm clocks were invented, there was a profession called a knocker-up, which involved going from client to client and tapping on their windows (or banging on their doors) with long sticks until they were awake. It lasted into the 1920s.

Josephine Myrtle Corbin, an American sideshow performer born in 1868, had a rare condition known as dipygus, which caused her to have four legs, each smaller inner leg paired with one of her outer legs. Corbin joined the sideshow circuit, captivating audiences as the "Four-Legged Girl from Texas."

Icelandic women went on strike for equal rights on October 24, 1975. 90% of women walked out of their jobs and homes, effectively shutting down the entire country. The men were struggling to keep up. The following year, Parliament passed a law requiring equal pay. Iceland elected the world's first female President five years later. Iceland now has the highest gender equality rate in the world.

Volcanic eruptions can devastate cities, change the world's atmosphere, and devastate economic systems. They can create molten lava rivers, mudslides, suffocating ash, and poisonous gases that cause chaos around the world for years. A volcanic explosion's effects can be massive, from its size to its death toll to its economic cost. Here is ten world’s most destructive and dangerous volcanic eruptions in history.

This clay tablet, written in cuneiform, is the oldest known written customer complaint about the delivery of poor quality copper ingots. Originally from ancient Babylon, the tablet dates back to 1750 BCE, and it was written by a customer named Nanni to a merchant named Ea-Nasir. It is currently housed in the British Museum.

On April fool's Day, 1976, the BBC convinced many listeners that a special alignment of the planets would temporarily decrease gravity on Earth. Phone lines were flooded with callers who claimed they felt the effects.

A Greek prime minister in 1830’s tried to spread the potato in Greece but people weren’t interested so he put armed guards in front of shipments of potatoes so people would think they were important. People later started stealing these potatoes a lot which spread the crop to all of Greece.

On April 28, 1988, Aloha Airlines flight 243 was on the way to Honolulu from Hilo when a huge portion of the upper part of the fuselage blew off the airplane.

In 1986, while doing a night shift at the hospital, Sandra Clarke, a registered nurse, was asked by an elderly patient to stay. She promised to be back after checking on her other patients, but by the time she returned, the gentleman had passed away. Clarke became one of the key figures in launching No One Dies Alone, a program that allows volunteers to sit with terminal patients who have no one else.

In 1814, there was a beer flood in London when a tank containing more than 300,000 gallons ruptured in which 8 people drowned.

Vince Coleman, a railway dispatcher, sacrificed his life in order to warn an incoming train of an imminent explosion. His telegraph said “Hold up the train. Ammunition ship afire in harbor making for Pier 6 and will explode. Guess this will be my last message. Good-bye, boys.” He saved 300 lives.