9 Strange Sounds No One Can Explain

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istock

Everyone has a favorite Wikipedia rabbit hole. Mine is “List of Unexplained Sounds.” I can’t remember how I first made my way to the page, but its array of sonic mysteries has shown me that while space is incredible, our planet is its own frontier of intrigue and unexplainable phenomena.

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 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 7 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 two 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, as well as 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 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.

A Low-Carb Diet Could Shorten Your Lifespan

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iStock

The Atkins, Paleo, and Keto diets may have different gimmicks, but they all share a common message: Carbs are bad and meat is good. Yet a new analysis reported by New Scientist suggests that anyone who buys into this belief may later come to regret it. According to the paper, published in The Lancet Public Health, people who eat a moderate amount of carbs actually live longer than those who avoid them.

For their study, researchers analyzed data previously collected from 15,400 participants in the U.S. They found that people who received about 50 to 55 percent of their calories from carbohydrates had the longest lifespans, roughly four years longer than those who got 30 percent or less of their energy from carbs.

This doesn't necessarily mean that the key to a healthy diet is to stock your pantry with pasta and croissants. The study also showed that people who got up to 70 percent or more of their energy from carbs died one year earlier on average than subjects in the 50 to 55 percent group. A closer examination at the eating of habits of people who ate fewer carbs revealed another layer to the phenomenon: When people avoided carbohydrates in favor of meat, their chances of early death rose, but the opposite was true for people who replaced carb-heavy foods with plant-based fats and proteins, such as nuts, beans, and vegetables.

These numbers point to something dietitians have long been aware of: Eating a diet that's based around animal products isn't ideal. Getting more of your protein from plant-based sources, on the other hand, can lower your blood pressure and reduce your risks of type 2 diabetes, heart disease, and certain cancers. Nonetheless, fad diets that forbid people from eating carbs while letting them eat as much steak as they want are still popular because they're an easy way to lose weight in a short amount of time. But as the research shows, the short-term results are rarely worth the long-term effects on your health.

[h/t New Scientist]

Why Is Pee Yellow?

Chloe Effron
Chloe Effron

WHY? is our attempt to answer all the questions every little kid asks. Do you have a question? Send it to why@mentalfloss.com.

Your body is kind of like a house. You bring things into your body by eating, drinking, and breathing. But just like the things we bring home to real houses, we don’t need every part of what we take in. So there are leftovers, or garbage. And if you let garbage sit around in your house or your body for too long, it gets gross and can make you sick. Your body takes out the garbage by peeing and pooping. These two things are part of your body’s excretory system (ECKS-krih-tore-eee SISS-tem), which is just a fancy way of saying “trash removal.” If your body is healthy, when you look in the toilet you should see brown poop and yellow pee.

Clear, light yellow pee is a sign that your excretory system and the rest of your body are working right. If your pee, or urine (YER-inn), is not see-through, that might mean you are sick. Dark yellow urine usually means that you aren’t drinking enough water. On the other hand, really pale or colorless pee can mean you might be drinking too much water! 

Your blood is filtered through two small organs called kidneys (KID-knees). Remember the garbage we talked about earlier? The chemicals called toxins (TOCK-sins) are like garbage in your blood. Your kidneys act like a net, catching the toxins and other leftovers and turning them into pee.

One part of your blood is called hemoglobin (HEE-moh-gloh-bin). This is what makes your blood red. Hemoglobin goes through a lot of changes as it passes through your body. When it reaches your kidneys, it turns yellow thanks to a chemical called urobilin (yer-ah-BY-lin). Urobilin is kind of like food coloring. The more water you add, the lighter it will be. That's why, if you see dark yellow pee in the toilet, it's time to ask your mom or dad for a cup of water. 

To learn more about pee, check out this article from Kids Health. 

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