Strange disappearances, lost civilizations, and unsolved murders make up this list of the biggest mysteries throughout history. Some are current-day active investigations, and some are thousands of years old, with the answers lost to time. According to an online message board, the following unexplained phenomena were voted as the top unsolved mysteries.
Bronze Age Collapse

During the 13th and 12th centuries, several large-scale, advanced Mediterranean civilizations mysteriously perished through widespread death and societal collapse. A number of theories involving natural disasters, disease, wars, and political instability are hotly debated among scholars, but no one knows for sure how these vast cultures vanished.
Greek Fire

Greek fire was a war weapon used in ancient battles starting in the year 672 AD. Soldiers on ships would launch fire from tubes mounted on the side of ships to ignite enemy boats. This ancient weapon has been compared to modern-day chemical weapons like napalm bombs, but to this day, no one knows exactly how the ancient Greeks were able to harness this powerful weapon without modern science.
Doggerland

Doggerland has been called the lost Atlantis of the North Sea. The sea separates the Island of Britain from the rest of Western Europe, including the Netherlands and France, but it’s suspected that Doggerland used to connect these two land masses before rising sea levels submerged it.
Beaumont Children Disappearance

In 1966, three Australian children aged 4, 7, and 9 years old mysteriously disappeared from Glenelg Beach in Adelaide. Their parents worked with local police, and the case garnered major media attention, but ultimately, the mystery was never solved. The tragic suspected abduction changed the way many Australians parented, who from this point on were no longer comfortable letting their kids play unsupervised.
Shelley Miscavige Missing

Shelley Miscavige is the wife of current Scientology leader David Miscavige. Many former members of the church of Scientology expressed concern for her, as she has not been seen with her husband David or otherwise for many years. Many fear foul play or worse, that she may have died and the church is covering it up. The mystery surrounding Shelley Miscavige is still ongoing.
Undiscovered Parts of the Ocean

Although parts of the ocean are very familiar to us, it is estimated that as much as 80% of the ocean has never been seen by human eyes and is, therefore, a mystery. Because of the vast depth, pressure, and distance to parts of the sea floor, exploring it would either be impossible or extremely dangerous.
JFK Assassination

On November 22nd, 1963, the 35th president of the United States, John F. Kennedy, was shot and killed while riding in his presidential motorcade. Although Lee Harvey Oswald was arrested in connection to the murder, a number of conspiracy theories have surfaced to explain this landmark moment in history.
The JonBenet Ramsay Case

In 1996, a 6-year-old children’s beauty pageant competitor named JonBenet Ramsay was murdered, and the circumstances surrounding it have been a mystery ever since. Some suspect the parents considering their odd behavior surrounding the case. Other theories have claimed that her 9-year-old brother Burke accidentally killed her, and the parents tried to cover it up for him.
D.B. Cooper Hijacking

In 1971, an unidentified man, who has since been referred to as D.B. Cooper, hijacked a plane bound for Seattle, demanded $200,000 in ransom money (which he got), and then parachuted out of the moving plane. Although the FBI had interviewed many suspects, they never identified the mystery hijacker.
Amelia Earhart Disappearance

Amelia Earhart was an infamous pioneer in aviation. She was known as the first woman to fly solo across the Atlantic Ocean. In July of 1937, Earhart went missing while flying. A number of theories and conspiracies surround the mystery, but no definitive proof has surfaced in connection with her disappearance.
Source: Reddit
10 Things We Thought Everyone Knew, But They Don’t

Have you ever learned something that everyone around you already knew for years and you just found out about? Or maybe you’ve been the one to tell people something you thought was common knowledge but no one else knew about it. This list, culled from an online message board, features several facts people thought were widely known, but, as it turns out, are not. Who knows! You might learn a few things in this article that you never knew before!
Read more: 10 Things We Thought Everyone Knew, But They Don’t
The Best Hidden Gems in Each of the 50 U.S. States to Add to Your Bucket List

From remote waterfalls and secretive caves to historic towns and untamed coastlines, these hidden gems are perfect for travelers looking to venture off the beaten path. Whether you’re a seasoned adventurer or a casual traveler, this list of hidden gems across all 50 states will inspire you to uncover the beauty and mystery that lies just beyond the familiar.
Read more: The Best Hidden Gems in Each of the 50 U.S. States to Add to Your Bucket List