Buzz
Since the dawn of modern science, humanity has been dedicated to uncovering the profound mysteries surrounding us. With recent advancements in science and technology, we now possess the tools to decode some of these unknowns like never before. This list highlights 10 such mysteries, each of which adds to our understanding without rendering previous 'unsolved mysteries' lists obsolete.
10. The Acoustic Marvel of Epidaurus Theater
The Ancient Theater of Epidaurus, located near Athens, Greece, was built in the late 4th century BC and remains one of the best-preserved ancient theaters. Renowned for its exceptional acoustics, the theater allows actors to be clearly heard by all 15,000 spectators without any need for amplification. To showcase this acoustic phenomenon, tour guides often scatter groups across the stands and demonstrate how even the faintest sounds can be heard from the center stage. For years, the secret behind this sound quality has intrigued both scholars and enthusiasts. Some theories proposed that prevailing winds carried the sounds, but the true answer lies in the seats. In 2007, researchers at the Georgia Institute of Technology discovered that the limestone seats act as natural acoustic traps, filtering out low-frequency noises and minimizing background crowd interference. Whether this acoustic perfection was accidental or a result of advanced design remains a mystery.
Interesting Fact: The orchestra (or dancing floor) is a perfect circle with a diameter slightly over 19.50 meters. A circular base, still intact at its center, likely supported an Altar to Dionysos (the Greek god of wine). You can watch and hear a demonstration of the theater's remarkable acoustics here.
9. Crystal Skulls
Many recognize crystal skulls from the movie *Indiana Jones and the Kingdom of the Crystal Skull*. However, numerous serious collectors believe these artifacts are pre-Columbian, originating from the Aztec or Maya civilizations, and possess paranormal qualities. In 2008, British and American researchers used electron microscopy and X-ray crystallography to analyze skulls from the British Museum and Smithsonian. Their findings revealed tiny rotary scratch marks around the eye sockets, teeth, and cranium, indicating the skulls were crafted using wheeled tools—something the Aztecs never utilized. The team concluded the skulls were carved from Brazilian rock crystal in Europe and later marketed as ancient Aztec relics. Due to their dubious origins, many museums have since removed these skulls from display.
Interesting Fact: For avid crystal skull enthusiasts, the Mitchell-Hedges Skull stands out as the most renowned. Allegedly discovered in 1924 by the adopted daughter of British adventurer F.A. Mitchell-Hedges, it is claimed to be over 3,600 years old. However, unlike the other skulls, this one has never undergone detailed scientific testing, as its current owner refuses to permit any examinations.
8. New England’s Dark Day
On May 19, 1780, an extraordinary event occurred when the daytime sky over New England and parts of Canada darkened unexpectedly. With limited communication at the time, many interpreted the phenomenon through a religious lens, and even today, some consider it a supernatural occurrence. Various theories, ranging from volcanic eruptions to cosmic disasters, were proposed. In 2008, nearly 230 years later, researchers from the University of Missouri analyzed historical records and tree ring data from fire-scarred trees, concluding that massive wildfires in Canada were the cause. These fires produced vast smoke columns that rose into the upper atmosphere, creating the eerie darkness observed hundreds of miles away.
Interesting Fact: Descriptions of ‘New England’s Dark Day’ include reports of midday meals eaten by candlelight, nocturnal birds singing during the day, flowers closing their petals, and unusual animal behavior.
7. Face on Mars
The Cydonia region on Mars garnered significant attention due to a hill that strikingly resembled a human face. First captured in detail by the Viking 1 orbiter launched in 1975, one image from 1976 revealed a mesa in Cydonia that appeared face-like. Initially dismissed by scientists as a trick of light and shadow, a second image taken at a different sun angle reignited interest. This sparked theories among extraterrestrial enthusiasts and talk show hosts, who speculated it was evidence of an ancient Martian civilization. However, most scientists maintained it was an optical illusion. In 2003, the European Space Agency's Mars Express mission used high-resolution stereo cameras to create a 3D model of the 'Face on Mars.' The latest images (bottom) reveal it as a natural landform shaped by landslides and debris, with no trace of a face.
Interesting Fact: The Cydonia region fascinates planetary scientists due to its unique location. The mesas lie in a transitional zone between the rugged southern highlands and the smoother northern plains. Some researchers believe the northern plains are remnants of an ancient Martian ocean.
6. The Barreleye Fish
The barreleye fish captivates with its tubular eyes, perfectly adapted to gather light at depths reaching 2,500 meters. For decades, scientists were puzzled by its eyes, which seemed fixed in place above its head, making it seemingly impossible for the fish to hunt. Recent studies using remotely operated vehicles at depths of 600-800 meters revealed a groundbreaking discovery: the eyes are housed behind a transparent, fluid-filled dome and can rotate within a protective shield covering the fish’s head. This unique adaptation allows the barreleye to look upward for prey or forward while feeding. First discovered in 1939, the fish’s transparent head was unknown initially, as bringing it to the surface destroyed its delicate structure.
Interesting Fact: The two small holes at the front of the fish are not its eyes. Instead, the eyes are the green, dome-shaped structures inside the top of its head. You can watch a video of the barreleye fish swimming here.
5. Solving Checkers
Checkers, also known as Draughts, has been a beloved game for over 400 years. Since 1989, computers have tirelessly analyzed its 500 billion billion possible moves. In 1992, world champion Marion Tinsley, considered the greatest human checkers player, narrowly defeated a computer. However, in 2007, researchers at the University of Alberta developed Chinook, a program capable of playing a perfect game of checkers. Utilizing up to 200 desktop computers, Chinook can evaluate every possible move and countermove, ensuring that if neither player makes a mistake, the game will end in a draw.
Interesting Fact: Checkers holds the record as the largest game ever solved, with a search space of 5×10^20. The calculations required to solve it amounted to 10^14 and were carried out over 18 years.
4. The Unknown Titanic Child
Days after the Titanic disaster, the body of a baby boy was recovered from the North Atlantic. Unable to identify the child, he was buried in Nova Scotia under a tombstone inscribed ‘The Unknown Child.’ In 2001, researchers at Lakeland University in Ontario received permission to exhume the body. By examining passenger lists, they narrowed the possible identities to four children: Gosta Paulson, Eino Panula, Eugene Rice, and Sidney Goodwin. Initial tests suggested the child was Eino Panula, but advanced DNA testing in 2007 revealed the remains belonged to Sidney Goodwin. Sidney, the youngest of six children from Fulham, England, was traveling with his family to Niagara Falls, New York. Tragically, none of his family members’ bodies were ever recovered. You can view a photo of the Goodwin family here.
Interesting Fact: The sailors on the recovery ship were deeply moved by the discovery of the boy’s body and funded his monument. He was buried on May 4, 1912, with a copper pendant placed in his coffin by the sailors, inscribed “Our Babe.” You can see the grave monument here.
3. Flight of the Bumblebee
This mystery claims the top spot because it inspired this list. Growing up, I often heard that, considering a bee’s wingspan and weight ratio, it’s aerodynamically impossible for them to fly. Another whimsical explanation was that bees fly because they believe they can. While charming, I knew it wasn’t true. Scientists struggled to explain how bees, seemingly un-aerodynamic, could fly. In 2005, using high-speed cinematography and mechanical models of bee wings, researchers finally solved the puzzle. Bees flap their wings an astonishing 230 times per second, faster than smaller insects. Their flight is powered by short, rapid wing strokes, quick rotations during direction changes, and an incredibly high wing-beat frequency.
Interesting Fact: To better understand bee flight, researchers made bees fly in a chamber filled with a less dense oxygen-helium mix. This forced the bees to exert more effort, allowing scientists to study their wing and body mechanics under stress. You can watch a super slow-motion video of a bee’s flight here.
2. Sharks Virgin Birth
In 2001, a hammerhead shark was born at Nebraska’s Henry Doorly Zoo, with three potential mothers in the same tank—all of which had been in captivity for over three years. The birth puzzled scientists for years. Some theorized that one of the sharks might have mated before capture and stored sperm for later fertilization. Others suggested asexual reproduction through parthenogenesis, a rare process that doesn’t require sperm. Skepticism persisted until 2007, when DNA testing confirmed the latter. After identifying the mother, researchers subtracted her genetic contribution from the offspring’s DNA, leaving no trace of paternal DNA. This marked the first documented case of asexual reproduction in sharks.
Interesting Fact: In 2008, scientists confirmed a second virgin birth involving a blacktip shark at the Virginia Aquarium & Marine Science Center. The shark, which died from stress-related complications, was found to be carrying a 10-inch pup during a necropsy. DNA tests revealed the pup had no genetic material from a male, further supporting the phenomenon of asexual reproduction in sharks.
1. Ancient Tablet Deciphered
This discovery might solve one scientific mystery while shedding light on another, which I’ll explain under 'Interesting Facts.' The circular clay tablet, unearthed 150 years ago in Nineveh, the ancient capital of Assyria (modern-day Iraq), features constellation drawings and cuneiform text used by the Sumerians, the world’s earliest known civilization. For decades, the tablet’s meaning eluded scientists. In 2008, Alan Bond and Mark Hempsell from Bristol University deciphered the cuneiform using a computer program that reconstructs ancient night skies. They determined the tablet was an astronomical notebook, documenting celestial events before dawn on June 29, 3123 BC (Julian calendar).
Interesting Fact: The tablet also depicts a large object moving through the Pisces constellation, with its trajectory pointing toward Köfels, Austria. Köfels is known for the largest crystalline Alps rockslide, but the absence of a crater puzzled scientists. The tablet’s data suggests the object entered at a shallow six-degree angle, clipping a mountain called Gamskogel and exploding before impact, explaining the lack of a crater. How such detailed information was extracted from this ancient tablet remains a marvel. You can view the rockslide area here.
Bellybutton Lint
The mystery of bellybutton lint has intrigued many for years. After three years of research and analyzing 503 lint samples from his own navel, chemist Georg Steinhauser from Vienna University uncovered the truth. The lint consists of cotton fibers, dead skin, fat, sweat, and dust. Steinhauser observed that abdominal hair often grows in concentric circles around the navel, acting like tiny hooks that trap lint. He also found that shaving belly hair eliminates navel lint entirely.
Interesting Fact: Credit is also due to Karl Kruszelnicki (Dr. Karl), an Australian scientist and media personality. Years ago, he analyzed bellybutton lint samples from nearly 5,000 individuals and discovered similar results, identifying the typical lint producer as a 'slightly overweight, middle-aged male with a hairy abdomen.' The photo above showcases a 25-year collection of navel lint from Graham Baker, another Australian, earning him a spot in the Guinness Book of Records.
