9 Strange Sounds No One Can Explain


Earth is its own frontier of intrigue and unexplainable phenomena. From mysterious bloops to baffling sonic booms and puzzling hums, our planet rings with unexplained sounds. Here are just a few that continue to confound scientists.

1. Upsweep

Upsweep is an unidentified sound that’s existed at least since the Pacific Marine Environmental Laboratory began recording SOSUS—an underwater sound surveillance system with listening stations around the world—in 1991. The sound “consists of a long train of narrow-band upsweeping sounds of several seconds duration each,” the laboratory reports. The source location is difficult to identify, but it's in the Pacific, around the halfway point between Australia and South America. Upsweep changes with the seasons, becoming loudest in spring and autumn, though it isn’t clear why. The leading theory is that it’s related to volcanic activity.

2. The Whistle

The Whistle was recorded on July 7, 1997, and only one hydrophone—the underwater microphones used by the National Oceanic and Atmospheric Administration (NOAA)—picked it up. The location is unknown and limited information has made it difficult to speculate on the source.

3. Bloop

Bloop is the big kahuna in unexplained sounds. In 1997 (a big year for auditory ocean mysteries), an extremely powerful, ultra-low-frequency sound was detected at various listening stations thousands of miles apart and traced to somewhere west of the southern tip of South America. The sound only lasted about a minute and and was heard repeatedly over the summer, but not since. Bloop is generally believed to be the sound of a massive icequake, but scientists haven’t totally ruled out the possibility that the sound originated from something “organic.”

That’s where things get eerie. If an animal was the source of Bloop, it would have to be larger than a blue whale. The most fanciful of all theories stems from the fact that Bloop’s location is somewhat close to author H.P. Lovecraft’s fictional sunken city of R’lyeh, where the creature known as Cthulhu lies “dead but dreaming.” Cthulhu can best be described as part man, dragon, and octopus, which seems as likely a source as any for the ocean’s greatest aural anomaly.

4. Julia

Julia was recorded on March 1, 1999, lasted for roughly 15 seconds, and was loud enough to be heard by the entire Equatorial Pacific Ocean hydrophone array. An Antarctic iceberg run aground is the leading suspect for its source.

5. Slow Down

Slow Down was first recorded on May 19, 1997 and is also credited to an iceberg running aground, though some people insist it might be a giant squid. The sound, lasting about seven minutes, gradually decreases in frequency, hence the name “slow down.” Like Upsweep, the sound has been heard periodically since it was initially detected.

6. The Hum

The Hum has been recorded on several occasions, mostly during the last 50 years or so. In these cases, there have been reports of a relentless and troubling low-frequency humming noise that can only heard by a certain portion of the population. It’s difficult to pinpoint when instances of the Hum began, but it’s been well-documented since the 1970s, and since then, cases have popped up all over the world—from Ontario, Canada to Taos, New Mexico to Bristol, England to Largs, Scotland and Auckland, New Zealand.

In most instances, the affected group only makes up around 2 percent of the population, but for those individuals, the Hum is largely inescapable and impossible to track. Those affected report never having heard noises before, and say the Hum is generally heard indoors and becomes louder at night. It’s also most common in rural and suburban areas and among people between age 55 and 70.

Scientists have long investigated the cause of the drone, occasionally tracing it to industrial equipment emitting particular frequencies. For the most part, though, the sound has left the world completely puzzled. The list of other possible culprits is long and wide-ranging—wireless communication devices, power or gas lines, electromagnetic radiation, radio waves, or Earth tremors are all suspects. Because the Hum appears and disappears and because the cause may vary from case to case, the phenomenon still baffles researchers. At this point, a few things are clear: The Hum is real and likely a byproduct of 21st-century living.

7. Skyquakes

Skyquakes, or unexplained sonic booms, have been heard around the world for the last 200 years or so, usually near bodies of water. These headscratchers have been reported on the Ganges in India, the East Coast and inland Finger Lakes of the U.S., near the North Sea, and in Australia, Japan, and Italy. The sound—which has been described as mimicking massive thunder or cannon fire—has been chalked up to everything from meteors entering the atmosphere to gas escaping from vents in the Earth's surface (or the gas exploding after being trapped underwater as a result of biological decay) to earthquakes, military aircraft, underwater caves collapsing, and even a possible byproduct of solar and/or Earth-based magnetic activity.

8. UVB-76

UVB-76, also known as The Buzzer, has been showing up on shortwave radios for decades. It broadcasts at 4625 kHz and after repeated buzzing noises, a voice occasionally reads numbers and names in Russian. The source and purpose has never been determined.

9. 52-Hertz whale

This animal, also known as the loneliest whale in the world, calls at a highly unusual 52 hertz, well above the normal frequency. Scientists have been listening to 52-Hertz for decades, and recently, filmmakers raised $400,000 on Kickstarter to seek the mammal out. It should be noted that the fundraiser reached its goal through the help of Leonardo DiCaprio, another mysterious beast.

7 Very Victorian Ways to Die

A circa 1860s lithograph titled "Fire: The horrors of crinoline & the destruction of human life."
A circa 1860s lithograph titled "Fire: The horrors of crinoline & the destruction of human life."

In the 19th century, the Grim Reaper was seemingly around every corner. A glass of water, a beautiful dress, or a brightly colored piece of wallpaper could all spell your doom. Poor sanitation, dangerous working practices, and widespread poisons meant that even those in their prime of life were not immune to sudden death. Thankfully, today's scientific advances—and better regulation—have massively improved life expectancy, although some of these dangers still lurk.

1. Flammable Fashion

In the 1850s and '60s, the trend for huge crinoline skirts boomed. These large structured petticoats covered with fabric gave the impression of a voluminous skirt, whereas previously, the look had been achieved by wearing numerous layers of skirts, which was both hot and cumbersome. Crinolines became popular in part because they were light and easy to maneuver.

There was, however, a downside to their design—crinolines, often made of diaphanous materials such as silk and muslin, were highly flammable. Numerous newspapers reported on the scores of women who had the misfortune to get too close to a naked flame. Fanny Longfellow, wife of Henry Wadsworth Longfellow, died in 1861 after her dress went up in flames when a lighted match or small piece of paper fell on her. Longfellow himself attempted to extinguish the flames, but his wife's skirts were so flammable it proved impossible to save her life. Another sad example was Archduchess Mathilde of Austria, who in 1867 is said to have pulled the classic teenage move of hiding a cigarette from her father behind her back and inadvertently set her dress ablaze.

Newspaper reports abounded with editorials on the perils of flouncy fashion, and offered various solutions (sometimes perhaps in jest). The Tablet in 1858 recommended, “We would … suggest that every lady wearing a crinoline, should be accompanied by a footman with a pail of water.” Needless to say, this was not a practical solution, but trends soon moved away from crinolines and the threat of fire lessened.

2. Opium Overdoses

A satirical engraving of an unscrupulous chemist selling a child arsenic and laudanum (tincture of opium)
A satirical engraving of an unscrupulous chemist selling a child arsenic and laudanum (tincture of opium)

Quieting fractious babies has always proved a challenge, but in the 19th century a seemingly wonderful solution was offered: opium. Tinctures of opium, such as Godfrey’s Cordial, were widely used as method to soothe sickly or teething infants. Although it might seem horrifying by modern standards to drug children into listlessness, in the 19th century opium was an extremely popular medicine and, before the days of aspirin, was commonly used as a painkiller and sleeping aid.

Godfrey’s Cordial was especially popular among working-class mothers who often had to return to work soon after the birth of a child. It became not uncommon to dose babies with Godfrey’s to make sure the child remained in a stupor until the mother returned from work. Unfortunately, accidental overdoses were frequent—in 1854 it was estimated that, in Britain, three-quarters of all deaths attributed to opium were of children under 5 years old. Fortunately, better regulation has meant that children’s medicines are now tightly controlled today.

3. Cholera Contamination

Many of us take it for granted that we can turn on the faucet and drink a glass of clean water. However, in the 19th century, as the populations in Europe and America ballooned and increasing numbers of people moved to cities, the infrastructure struggled to cope. Many slums had open sewers in the streets and an unreliable water supply, and communal wells and water pumps were often contaminated with raw sewage. This meant that water-borne diseases such as cholera and typhus became rife.

The cholera outbreaks of the 19th century originated in India, but with the growth of global trade networks it soon spread around the world. A pandemic around 1832 ensued when the disease reached Britain and America for the first time. Several other pandemics swept the world, killing 23,000 people in Britain in 1854 alone. Physician John Snow mapped the cases of cholera in London's Soho that year, and traced the cause to a single water pump that was located near a cesspool. The pump was removed, and cholera cases dropped dramatically. As scientific understanding of the spread of water-borne diseases improved, public water supplies were cleaned up, and the last documented cholera outbreak in the U.S. was in 1911.

4. Arsenic Poisoning

A jar of poisonous Paris Green
Chris goulet, Wikimedia // CC BY-SA 3.0

Colorful green wallpaper was the height of fashion in the Victorian era, largely spearheaded by pre-Raphaelite artists and designers. The green pigment often used, known as Scheele’s Green, had first been developed in 1775 by German-Swedish chemist Carl Wilhelm Scheele, and the key to its vibrant shade was the use of arsenic. Although arsenic was known to be poisonous if eaten, at the time it was thought to be safe as a color pigment.

In 1862 an investigation was carried out after several children from the same family sickened and died within weeks of each other in Limehouse, London. Dr. Thomas Orton investigated the case and concluded that the children had been poisoned by the arsenic in their bedroom's green wallpaper. Arsenic coloring was also used for dresses, hats, upholstery, and cravats. The poison was sprayed on vegetables as insecticide, and even added to beer. Restrictions on its use in food and drink were only added in 1903. Today, historic houses have had their arsenic wallpaper removed, and arsenic-dyed clothes in museum collections are generally kept safely behind glass.

5. Fatal Factories

By the 19th century, rapid industrialization across Europe and America had led to thousands of factories producing everything from fabric to munitions. Numerous adults—and children—were employed in these factories, providing ample opportunity for death and injury.

The cotton factories of Manchester, England, for example, could kill you in a number of ways. First, the air was thick with cotton fibers, which over time built up in workers’ lungs, causing breathing difficulties and lung disease. Then there were the whirling, grinding machines that might catch your sleeve or hair, dragging you into the loom. Children were employed to clean under the machines and retrieve dropped spindles because their small size allowed them to move about under the moving machines—but a trip or a loss of concentration often proved fatal. The huge number of accidents and deaths in factories eventually led to increased regulation—reducing working hours, restricting child labor, and making the machines themselves safer.

6. Sudden Spontaneous Combustion

Some Victorian scientists believed that alcoholism could cause spontaneous combustion. This idea caught the public imagination, and the theory was used by Charles Dickens in Bleak House (1853) to explain the death of the drunken rag and bone man Mr. Krook. In Victorian accounts, the victims were typically overweight and were heavy drinkers, and their bodies had seemingly burst into flame, leaving only their legs intact. Needless to say, the threat of spontaneous combustion was soon seized upon by the temperance movement, who used the supposed link to alcoholism to scare people away from the demon drink.

For example, The Anatomy of Drunkenness by Robert Macnish (1834) described the various types of drunk and devoted a whole chapter to the risk of spontaneous combustion. Macnish recounted a number of case studies, including that of Mary Clues—an inveterate drinker who was found almost entirely incinerated excepting one leg, while the room around her was more or less undamaged. Despite the widespread discussion of spontaneous combustion in the Victorian era, it's now generally considered highly unlikely if not impossible. Modern forensic science has in part explained the phenomena through the “wick effect,” wherein a body on fire produces melted fat that seeps into the clothes, causing a long, slow, self-contained burn that may look like the result of spontaneous combustion—but almost certainly began with an external source.

7. Pestilent Pox

Smallpox has been around for over 12,000 years. Europeans brought the disease to North and South America in the Age of Exploration, killing up to 90 percent of indigenous populations. Smallpox was still prevalent in the 19th century and killed about 30 percent of its victims. Those that survived were often blinded or badly scarred by the virulent pustules. To give some idea of the scale of fatalities, in just one year, 1871, over 50,000 people died of smallpox in Great Britain and Ireland alone.

In 1796 the English doctor Edward Jenner noticed that milkmaids who had caught cow pox appeared to be immune to smallpox. This led Jenner to create the world’s first vaccine. As with many new developments, it took a number of years for vaccination to catch on, but once it did the incidence of smallpox began to fall. In 1980 the World Health Organization declared the disease exterminated—the first virus ever to be completely eradicated world over—thanks to a sustained program of vaccination.

Australian Pals Claim to Have a 25-Year-Old McDonald's Quarter Pounder in Their Possession

PeJo29/iStock via Getty Images
PeJo29/iStock via Getty Images

What's older than Google, Netflix, and Tom Holland? A Quarter Pounder from McDonald's that's been traveling Australia for a quarter of a century. As 7News.com.au reports, the hamburger was purchased from a McDonald's restaurant in the mid-1990s, and roughly 25 years later it shows no signs of rot—a fact that's somehow more repulsive than the alternative.

Adelaide residents Casey Dean and Eduard Nitz bought the Quarter Pounder with Cheese in 1995 with their friend Johnno who was visiting from out-of-town at the time. Unable to finish the patty, Johnno asked his friends to hold on to it for him until his next visit.

He couldn't have guessed the implications of his request. After the meal, Nitz tossed the boxed-up hamburger into his cabinet at home where it would sit until he moved out. The Quarter Pounder remained in pristine condition, so instead of throwing it away, Nitz handed it off to his sister before going to live overseas. She ended up bringing it with her on various moves across the continent. Then, in 2015, Casey Dean became the official guardian of the indestructible sandwich.

As it nears its 25th birthday, the Quarter Pounder is still far from the nasty, moldy mess you'd expect it to be. That's because McDonald's hamburgers aren't very moist to begin with, so they dry out faster than they can decay. It's the same reason beef jerky can last so long; in other words, there are no mystery chemicals at play.

The same phenomenon can be seen in one of the last McDonald's meals ever purchased in Iceland. The unspoiled burger and fries from 2009 are currently on display at a small hotel in the country.

[h/t 7News.com.au]