9 'Scientific Mysteries' the Internet Loves, Debunked

John Fielding, Flickr // CC BY 2.0
John Fielding, Flickr // CC BY 2.0

Whether it involves aliens, moving rocks, or crop circles, no one loves a scientific mystery like the internet—even if that "mystery" was solved years ago using all of the rigors of science. Here are 10 so-called mysteries that the global online community can't bear to part with, debunked once and for all (we hope).

1. KUMMAKIVI BALANCING ROCK // RUOKOLAHTI, FINLAND

The "Mystery": This so-called "strange rock" is a balancing act comprised of two rocks, one teetering precipitously on top of the other. Locals of ancient yesteryear, apparently perplexed to discover that the top rock was in no danger of sliding off the bottom rock despite the extremely small point of contact between them—and was, in fact, too heavy to be moved at all—decided giants tossing boulders explained the phenomenon. "And it's true," one theorist wrote: "There is still no exact scientific explanation, but contrary to the laws of physics, the stone stands quite firmly and human strength is not enough to move it."

Science Says: It's not true, actually. Geologists put forward a much more likely cause for this balancing rock and the countless others that exist worldwide: Melting glaciers deposited them where they currently squat.

2. FAIRY CIRCLES // NAMIBIA

geographic features called fairy circles in namibia, created by termites and plants
iStock

The "Mystery": Are they footprints of the gods? Barren patches caused by a dragon's fiery breath? Marks left behind by UFOs? All of these ideas were perpetuated by the internet after tour guides in the region passed them on to tourists, according to The New York Times. The scientific community was pretty sure the dirt circles found in the Namib Desert were none of those things, even though they were hard-pressed to come up with a more logical explanation—until recently.

Science Says: Research published in 2017 suggests that they're the work of colonies of termites, which clear circular patches around their nests; the barrenness of these shapes is possibly enhanced by plants as they stretch their roots to reach scarce water—which prevents other plants from growing in the process.

3. KLERKSDORP SPHERES // OTTOSDAL, SOUTH AFRICA

klerksdorp sphere
Robert Huggett

The "Mystery": These grooved spheres have been the subject of many strange theories, most revolving around the existence of intelligent aliens who made the pod-like trinkets—which apparently can rotate on their axes—using intelligent alien technology and otherworldly metals some 3 billion years ago. Virtuescience.com has proposed a whole host of theories about the spheres' uses, including ancient ammunition, messages from space, and currency.

Science Says: Geologists have a more tempered explanation for how the spheres came to be: They're concretions—little balls of rock that have grown around a core object—of the minerals hematite, wollastonite, or pyrite that have hardened over time in nests of volcanic ash or sediment. The myth of alien metalworking skills was debunked back in 1996, but it still resurfaces every once in a while.

4. WEBDRIVER TORSO // YOUTUBE

The "Mystery": The Webdriver Torso YouTube account has been freaking out the internet with its videos for several years. Commentors posited that the videos—which were usually 11 seconds long and featured colored rectangles moving around on a white screen—were spy code, alien code, or recruitment searches for expert hackers. At the channel's peak, videos were uploaded as often as every two minutes.

Science Says: Google revealed in 2014 that they were simply video clips the company had created to test the quality of YouTube videos. "We're never gonna give you uploading that's slow or loses video quality, and we're never gonna let you down by playing YouTube in poor video quality," the company told Engadget in a statement/Rickroll. "That's why we're always running tests like Webdriver Torso." Conspiracy theorists, however, pointing out that videos had been uploaded elsewhere before Google took credit for the channel, continued to suspect darker intentions. One reddit user posited in 2015 that Google "could … have a secret agenda." Maybe Google wants this chatter to continue: Even today, googling "Webdriver Torso" will yield an easter egg.

5. SAILING STONES // DEATH VALLEY NATIONAL PARK, CALIFORNIA

Sailing stones of Death Valley National Park
Thomas Hawk, Flickr // CC BY-NC 2.0

The "Mystery": Known alternately as sliding, walking, or moving rocks, for more than 100 years these so-called "living stones" have seemingly slid across the floor of a dry lake bed all on their own, leaving trails of their movements—and causing plenty of speculation. Magnetic force is one popular theory, along with psychic energy and the interventions of alien spacecraft. Some claim a 700-pound stone named Karen disappeared for two years, only to somehow reappear again.

Science Says: In 2014, scientists studied the situation and discovered that the stones move when the lake bed they rest on becomes covered with rainwater that freezes overnight into a sheet of ice; when the ice melts, it pushes the rocks here and there—assisted by Death Valley's powerful winds. (No word on what Karen's been up to, though.)

6. NAZCA LINES // NAZCA, PERU

Aerial view of a geoglyph representing a Duck or a Dinosaurius at Nazca Lines
Martin Bernetti, AFP/Getty Images

The "Mystery": If conspiracy theorists like aliens, they love ancient aliens. When it comes to the Nazca lines, they speculate that ancient astronauts from outer space drew almost 1200 geometric, animal, and plant shapes in a vast, arid plateau on Peru's Pampas de Jumana. Ranker.com also purports that the designs were made by humans, "most likely to signal extraterrestrials," and possibly to provide a runway for their space ships.

Science Says: The truth—which has been known since at least the 1940s—is that the figures were created 1500 to 2000 years ago by the Nazca people, who removed rocks and/or a portion of topsoil to create an image in negative. At first, scientists believed the figures were astronomical symbols, or an early sort of calendar, but later research indicated the drawings were used ritualistically, in ceremonies involving the quest for scarce water.

7. BERMUDA TRIANGLE // ATLANTIC OCEAN

aerial view of bermuda

Peter Burka, Flickr // CC BY-SA 2.0

The "Mystery": Three hundred ships and planes, all supposedly sunk or gone missing in the same general area in the middle of the Atlantic Ocean: The Bermuda Triangle (so-named by pulp writer Vincent Gaddis in 1964) has had conspiracy theorists of all stripes spouting endless theories for years. Atlantis! Alien interventions! An opening in the fabric of the universe! Attack by sea monsters! A popular theory in the 1970s involved magnetism wreaking havoc on navigational devices, and one more recent theory suggested that bursting bubbles of methane gas were responsible for missing craft. Online speculations, like this one from BuzzFeedBlue, attempt to stoke the (nonexistent) fire.

Science Says: This has been settled for decades—there is no mystery. In 1975, librarian turned investigative author Larry Kusche unearthed the actual facts: Some "missing" vessels were simply made up; some sank far from the Triangle; and others along the route—which is still heavily trafficked today—fell prey to the region's frequent bad storms.

8. CROP CIRCLES // BRITAIN

The "Mystery": A lot of otherworldly meaning has been ascribed to these designs squished into fields of wheat, rapeseed, and barley. Once again, aliens—mathematical-genius aliens this time—are said to be responsible for them, hiding complicated messages in the circles' sometimes intricate imagery. Others suggest they're spiritual centers that beam energy. In the video above, a farmer who found an intricate crop spiral in his field says, "I don't know what caused it, but I'm not sure that it was made by people."

Science Says: The truth is simple, and perhaps disappointing, which may explain why the alien theory never seems to die: The circles are made under cover of darkness by people, sometimes with the permission of the farmers whose land they're created on. They use measuring devices, rollers, and other low-tech gear to push patterns into grain.

9. ATA THE MUMMY // ATACAMA, CHILE

The "Mystery": When a small, oddly shaped, strangely featured mummy was discovered in Chile's Atacama Desert in 2003, some on the internet called it proof that beings from space had once lived among humans—and perhaps even mated with them. The mummy had 10 ribs instead of the typical 12; a strangely sloped head; and at just 6 inches long, was fetus-sized, but its bones were as dense as a child's. Some thought that the 9 percent of the mummy's DNA that didn't match the human DNA they compared it to was further evidence of its non-human origins. As UFO/ET conspiracy theorist Steven Greer says in the above clip, "Is that all computer read error? Maybe. Is it what's called DNA junk? Perhaps. We don't know."

Science Says: Testing of Ata's genome destroyed these theories, proving that Ata was 100 percent human and died, likely in utero, from genetic defects. Many of these mutations related to bone development, explaining her missing ribs and thick bones. Exposure to nitrate-contaminated drinking water may have been a factor in her deformations as well. And that 9 percent genetic difference? Standard contamination of a mummy that was exposed to the open air.

Could Gigantic Coconut Crabs Have Played a Part in Amelia Earhart’s Mysterious Disappearance? At Least One Scientist Thinks So

Getty Images
Getty Images

Amelia Earhart's disappearance during her attempt to fly around the world has captivated historians and conspiracy theorists for more than 80 years. One organization is now suggesting that her fate may have been sealed by giant crabs.

The International Group for Historic Aircraft Recovery (TIGHAR) believes that Amelia Earhart and navigator Fred Noonan may have landed their plane on Nikumaroro Island when they couldn't find their target, Howland Island, and that Nikumaroro's endemic crustaceans may have played a part in the ensuing mystery.

According to National Geographic, there are several clues supporting TIGHAR's theory. The large reef that hugs Nikumaroro’s coast makes it conducive to emergency aircraft landings. In 1940—just three years after Earhart’s disappearance—British colonists found 13 human bones beneath a ren tree on the island and shipped them to Fiji, where they were lost. The colony's administrator, Gerald Gallagher, sent a telegram back to England positing that it was Earhart’s skeleton. Then, in 2001, researchers uncovered U.S.-made artifacts around the ren tree including a jackknife, a woman’s compact, a zipper, and glass jars. The plot thickened even further in 2017, when four forensic bone-sniffing dogs all indicated that a human had indeed died at the site, though excavators failed to dig up any more evidence.

If those 13 bones beneath the ren tree did belong to the unfortunate castaway, where are the rest of her remains? Tom King, TIGHAR’s former chief archaeologist, thinks that coconut crabs can answer that question.

Nikumaroro is home to thousands of the colossal creatures, which can grow to a terrifying 3 feet across and weigh 9 pounds. They’re sometimes called robber crabs because of their penchant for absconding with objects that smell like food, and they’ll eat practically anything—coconuts, fruit, birds, rodents, other crabs, their own discarded body parts, and carrion.

It’s not unreasonable, then, to think that coconut crabs may have feasted on Earhart’s corpse and then taken her bones home with them. In one experiment to test the theory, TIGHAR researchers deposited a pig carcass on the island and filmed the aftermath. With the help of small strawberry hermit crabs, coconut crabs stripped the pig down to the bone in two weeks. After a year, some of the bones had been dragged 60 feet from the carcass’s original location, and some were never recovered at all.

King believes Earhart’s missing 193 bones could be hidden in the burrows of various coconut crabs. As in the pig experiment, crabs may have scattered some of Earhart’s bones dozens of feet away, but maybe not all of them—after all, the forensic dogs smelled bones near the ren tree that haven’t yet been located. Right now, TIGHAR is working with the Canine Forensics Foundation to further explore the area.

While we wait for more answers, dive into these other theories about Earhart’s disappearance.

[h/t National Geographic]

10 Juicy Facts About Leeches

Ian Cook
Ian Cook

Leeches get a bad rap, but they’re actually pretty cool once you get to know them—and we're finding out more about them, even today. Recently, a team led by Anna Phillips, curator of parasitic worms at the Smithsonian National Museum of Natural History, discovered a new species of medicinal leech (pictured above) in a Maryland swamp. We asked parasite expert and curator at the American Museum of Natural History Mark E. Siddall to share some surprising facts about the worms we love to hate. 

1. Not all leeches suck blood.

Hematophagous, or blood-feeding, species are only one type of leech. “The vast majority of species are [hematophagous],” Siddall tells Mental Floss, “but it depends on the environment. In North America, there are probably more freshwater leeches that don’t feed on blood than there are blood-feeders.” And even among the hematophagous species, there are not too many who are after you. “Very few of them are interested in feeding on human blood,” Siddall says. “Certainly they’ll do it, if they’re given the opportunity, but they’re not what they’re spending most of their time feeding on.” 

2. Leeches are everywhere.

Japanese leech on a log
Pieria, Wikimedia Commons // Public Domain

“Every continent on the planet has leeches, with the exception of Antarctica,” Siddall says. “And even then there are marine leeches in Antarctic waters.” Humans have co-existed with leeches for so long, according to Siddall, that just about every language has a word for leech. 

3. Leeches have made a comeback in medicine.

Bloodletting for bloodletting’s sake has fallen out of favor with Western physicians, but that doesn’t mean medicinal leeches are enjoying a cushy retirement. Today, surgeons keep them on hand in the operating room and use them as mini-vacuums to clean up blood. “That is a perfectly sensible use of leeches,” Siddall says. Other uses, though, are less sensible: “The more naturopathic application of leeches in order to get rid of bad blood or to cure, I don’t know, whatever happens to ail you, is complete hooey,” he says. How on Earth would leeches take away bad blood and leave good blood? It’s silly.” 

4. Novelist Amy Tan has her own species of leeches.

Land-based leeches made an appearance in Tan’s 2005 book Saving Fish from Drowning, a fact that instantly put the author in leech researchers’ good graces. “There are not a lot of novels out there with terrestrial leeches in them,” Siddall says. So when he and his colleagues identified a new species of tiny terrestrial leeches, they gave the leech Tan’s name. The author loved it. “I am thrilled to be immortalized as Chtonobdella tanae,” Tan said in a press statement. “I am now planning my trip to Queensland, Australia, where I hope to take leisurely walks through the jungle, accompanied by a dozen or so of my namesake feeding on my ankles.”

5. Leeches can get pretty big.

The giant Amazon leech (Haementeria ghilianii) can grow up to 18 inches and live up to 20 years. And yes, this one’s a blood-feeder. Like all hematophagous species, H. ghilianii sticks its proboscis (which can be up to 6 inches long) into a host, drinks its fill, and falls off. Scientists thought the species was extinct until a zoologist found two specimens in the 1970s, one of whom he named Grandma Moses. We are not making this up.

6. Leeches make good bait.

Many walleye anglers swear by leeches. “A leech on any presentation moves more than other types of live bait," pro fisher Jerry Hein told Fishing League Worldwide. "I grew up fishing them, and I think they're the most effective live bait around no matter where you go." There’s an entire leech industry to provide fishers with their bait. One year, weather conditions kept the leeches from showing up in their typical habitats, which prevented their collection and sale. Speaking to CBS news, one tackle shop owner called the absence of leeches “the worst nightmare in the bait industry.”

7. Leech scientists use themselves as bait.

Siddall and his colleagues collect and study wild leeches. That means hours of trekking through leech territory, looking for specimens. “Whether we’re wandering in water or traipsing through a bamboo forest,” Siddall says, “we are relying on the fact that leeches are attracted to us.” Do the leeches feed on them? “Oh my god, yes. We try to get them before they feed on us … but sometimes, obviously, you can’t help it.”

8. Leech sex is mesmerizing.

Like many worms, leeches are all hermaphroditic. The specifics of mating vary by species, but most twine themselves together and trade sperm packets. (The two leeches in the video above are both named Norbert.)

9. Some leech species make surprisingly caring parents. 

“There’s a whole family of leeches that, when they lay their eggs, will cover them with their own bodies,” Siddall says. “They’ll lay the eggs, cover them with their bodies, and fan the eggs to prevent fungus or bacteria from getting on them, and then when the eggs hatch, they will attach to the parent. They’re not feeding on the parent, just hanging on, and then when the parent leech goes to its next blood meal it’s carrying its offspring to its next blood meal. That’s pretty profound parental care, especially for invertebrates.”

10. You might be the next to discover a new leech species. 

Despite living side-by-side with leeches for thousands of years, we’ve still got a lot to learn about them. Scientists are aware of about 700 different species, but they know there are many more out there. “I’ll tell you what I wish for,” Siddall says. “If you ever get fed on by a leech, rather than tearing off and burning it and throwing it in the trash, maybe observe it and see if you can see any color patterns. Understand that there’s a real possibility that it could be a new species. So watch them, let them finish. They’re not gonna take much blood. And who knows? It could be scientifically useful.”

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