Scientists Are Baffled By These Impossible Structures

Look closely enough at a satellite map of our planet and you'll start to see things that shouldn't exist. Perfect circles, razor-sharp labyrinths of stone, and a giant ancient eye staring back at us from space in the middle of the Sahara desert. Are these bizarre anomalies just freak accidents of time and erosion? Or are we looking at the ruins of lost people and civilizations we've totally forgotten? The Canadian Crater No One Can Explain Look at a satellite map of Canada's Hudson Bay and one feature immediately stands out. A massive, near-perfect, semicircular shape known as the Nastapoka Arc. For decades, geologists assumed it was a humongous impact crater left behind by an asteroid, but modern rock sampling has thrown a wrench into that theory. There isn't a single trace of impact evidence. Understanding how this strange geographical anomaly ended up on our maps started over 400 years ago on June 26, 1611. English explorer Henry Hudson, aboard his ship Discovery, had spent the previous year mapping these northern waters. Everything was going well until his vessel got trapped in the Arctic ice. Desperate to avoid another freezing winter, his crew pleaded to sail for England. Hudson refused, insisting on pushing west toward the Pacific. Tensions boiled over and on that cold June morning, the crew staged a violent mutiny. They left Henry Hudson, along with a few of his loyal crew members, in a small boat and sailed the Discovery back to England. Henry Hudson died out there. His bones were never found. To this day, his fate is unknown. Did he drown? Did he live out the rest of his days wandering through the forest? Maybe he met a group of Native Americans and they adopted him as their own. Who knows? Whatever happened to Henry Hudson, he never made it back to England. His misfortune also immortalized him because now the bay where he was set adrift to die has his name. Before Henry Hudson's crew turned on him, their voyage aboard the Discovery brought them face-to-face with a massive geographical mystery. Deep in the southern reaches of Hudson Bay, where the expedition spent its final brutal winter, sits James Bay. Just to the north, along the coast of Quebec, the shoreline sweeps into an unnaturally clean arc. Hudson and his crew were among the first to map these waters. Completely unaware, they were charting the boundary of the Nastapoka Arc. That curve creates a perfect imaginary circle roughly the size of Wisconsin. It's hard to see until you notice it and then you can't unsee it. The circle, barely more than a faint outline, looks very much like an impact crater from a meteorite strike. For decades, scientists assumed a meteorite was responsible for the Nastapoka Arc. In 1972, a pair of American geophysicists traveled to Hudson Bay to confirm it. When they arrived, they were a little confused. They had expected to find shatter cones, fractures, magnetic anomalies, gravitational anomalies, you know, the usual suspects when it comes to an impact crater. They were so disappointed that they left without having proven anything. There were subsequent expeditions that used more advanced technology to look for signs, but they didn't find any either. All the evidence, or the lack thereof, points to the arc being a perfectly natural formation. But that can't be right, can it? Since when does nature produce such uncanny geometry? Since scientists don't know the truth, they've decided that maybe the Nastapoka Arc is an ancient depression caused by heavy glaciers. These days, the most popular theory is that it's a tectonic boundary formed when a shelf of rock got pushed under another shelf of rock. If true, it is the only tectonic boundary ever discovered that looks like it was made by a 280-mile-across cookie cutter. The Dallol Hydrothermal Field Life always finds a way, even in the most hostile region on Earth. There may be no place on Earth more violently opposed to life as Ethiopia's Dallol Hydrothermal Field, located in the Greater Danakil Depression. This is a place where the ground is boiling acid, where the salt flats can suck the moisture right out of your body and leave you mummified, and where the air temperature is an average of 94 degrees but frequently rises much more than that. The real mystery of Earth's most hostile region isn't just how brutal it is, but that anything managed to survive here at all. Sure, you won't spot massive animals roaming the landscape, unless you count the bird skeletons slowly dissolving in pools of acid. To find the local wildlife, you'll need to look way closer, down to the microscopic level. The Danakil Depression sits in Ethiopia's Afar Triangle, one of the hottest places on the planet. It's also one of the lowest places on the planet, suddenly dropping to over 400 feet below sea level. Temperatures often rise to over 130 degrees, making it a pretty bad place to get a tan. But it is visually striking. The region is a canvas of yellows and oranges and so many different toxic hues, it's hard to tell where one color begins and another ends. These fantastic colors are a result of the weird geology in the region. Magma from nearby volcanoes superheats the groundwater, which then bubbles to the surface as acidic hot springs. You can see the same thing in Yellowstone, but the landscape here isn't even close to Yellowstone. Here, the landscape looks like an alien planet because of all the minerals getting dissolved by the superheated groundwater. When that groundwater hits the surface, it dissolves salt and other minerals, creating this wash of noxious coloring. The whole region was once part of the Red Sea. But as volcanic eruptions built mountains, those mountains cut off this section to water. Without the water, the depression became a hellscape. But there is life. The Afar people have lived here for centuries. They move around the region with their herds of goats and camels, harvesting salt from the depression. That salt was used as a form of currency in Ethiopia up until about 100 years ago or so. Afar miners travel to the salt fields, mine the salt by hand, and then lash the six and a half pound slabs onto their camels. Two herders then lead the camel caravan across the desert in the sweltering sun, often with minimal food and practically no water. This is one of those examples of human beings adapting to the most extreme environment imaginable. These Afar salt miners, who seem invincible in the face of the kind of heat that would kill most people, have adapted to what is basically life on Mars. And they aren't the only ones. In 2016, the New York Times reported on a research team from Spain who worked together with a team from Ethiopia to study extremophiles at Dallol. Extremophiles are as extreme as they sound. These are tiny microbes able to live in unthinkable conditions. The microorganisms thrive in hydrothermal vents, super salty lakes, polar ice caps, and even here in Dallol's yellow hot springs. Many scientists believe extremophiles are likely to be discovered on other planets. Planets just like Mars are friendly red neighbor. Expedition leader Felipe Gomez said their goal was to understand the limits of life and the possibility of extremophiles living on planets like Mars. If an animal, even a microscopic one, can evolve in a place like Dallol, they can evolve anywhere in the universe. That's the point that researchers wanted to make, that if life is here, it can be there too. But there is a bit of confusion. Another team of researchers studied Dallol in 2019. They found no life inside the acidic hydrothermal pools. They found no DNA whatsoever and no traces of any living organisms. Then a different research team examined the same pools and did find traces of life. Their findings could be corrupted by contamination, but either way, there is a clear conundrum here. Dallol does have extremophiles, but it's unclear as of yet how extreme these microbes can be. They live in the depression, but no one has managed to confirm if they live inside the acidic pools. And that's the real test. If microbes can be found in what are basically natural vats of acid, it will be a huge breakthrough for life on other planets. The discoveries made in the Dallol hydrothermal fields will hopefully help us conquer a world so deadly only the toughest and strongest lifeforms can handle it. The Impossible Potomsky Crater Siberia is one of the spookiest places in the world simply because it is so vast, empty, and unexplored. While trekking through the wilderness north of Irkutsk in 1949, geologist Vadim Kolpakov discovered a geological anomaly that immediately caught his attention. Rising out of the dense green forest was a massive scarred monument of limestone. Over 120 feet high and 300 feet wide, the structure formed a strange elevated crater, complete with a smaller 36-foot mound resting directly in the center. In every direction, there was nothing but untouched forest, making this pale, cracked crater look like a fresh impact zone. When Vadim asked the locals about it, they told him it was called the fiery eagle's nest. It ended up being named Potomsky after a nearby river, but I think its original name is way cooler. Ever since Vadim made that discovery almost 80 years ago, scientists have speculated how the geological formation was formed. For a long time, they suspected the crater at the top of the structure was created by a meteorite strike. Some even suspected it had something to do with the Tunguska event of 1908, when a huge portion of the Siberian taiga was flattened by a cosmic airburst. The space rock responsible for the Tunguska event has never been found. There were rumors that a piece of it had hit this spot, creating the mound, but it is highly unlikely. According to modern studies, the crater doesn't resemble a real meteorite site. Later geologists suggested it was a nascent volcano, meaning recently born or newly forming, but nobody has ever found any volcanic material. So it's not a volcano and it's not an impact site. But it must be something, because this kind of formation doesn't just appear out of thin air. To try and get a grip on the situation, scientists turned to the trees. They counted the trees growing on the crater to determine how long it's been around. Most of the trees were about 250 years old, so that was probably around the time the huge mound formed. Weirdly though, the trees surrounding the crater experienced accelerated growth for a brief period of time. There's no obvious reason why, but there is a very unnerving connection. In the forests around Chernobyl, scientists have found that the trees experienced an accelerated growth period following the legendary nuclear disaster of 1986. The trees in Chernobyl suddenly started growing after they became radiated. This is one of those mysteries that's hard to quantify because the sources for the information are not always reliable. I told you that Chernobyl's trees had a growth spurt after the disaster because that's the information available. Specifically, it's the information on multiple websites popular with conspiracies. But when you look at actual scientific studies, exposure to radiation at Chernobyl did the opposite. It suppressed tree growth, which would make more sense. Reports from the BBC in 2013 say exactly the opposite of the information from these other sites. So how are you supposed to know who to believe? In 2014, Smithsonian Magazine reported that the forests around Chernobyl aren't decaying properly. The trees are growing slower and fewer, while the animals who rely on them are mutating. Birds around Chernobyl have been found with significantly smaller brains than those living just outside the poisoned areas. But some still claim that Chernobyl's trees experienced a brief surge of growth, even if there's no documented evidence of it. And hey, maybe they did have a growth spurt, but I want to make sure you know the whole story. The supposed rapid growth of Chernobyl's trees has been linked to the rapid growth of trees at the Potomsky crater. That link has led to speculation that there is a hidden nuclear plant buried under the ground. This nuclear facility supposedly belonged to an ancient advanced society. Their technology is buried so deep that modern humans have never found them. If that's a little too sci-fi for you, there's another theory that says a UFO crashed and was buried underneath the mound. The radiation from the nuclear fuel on board the spaceship is supposedly what caused the trees to suddenly grow really fast. However, nothing of the sort has ever been found. No one has discovered artifacts relating to ancient humans, ancient aliens, or ancient impacts. The most realistic explanation is a gas volcano. The mound may have formed from the underground release of fluids like hydrogen. This happens all of the time in Siberia. Siberia has an exploding sinkhole problem. Random parts of the ground are exploding as gases build up and then blow straight through the earth. This could have been what formed the Potomsky crater, just on a grander scale. A bunch of gas accumulated, exploded, and this is the result. At the end of the day, doctor of geological and mineralogical sciences Alexander Pospev said it best, even now the origin of the crater is not discovered, but we can say for sure that it has earthly origin. Madagascar's deadly stone forest. Imagine a forest made entirely of razor-sharp limestone blades where a single misstep can be fatal. This is Tsingy de Bemaraha, a geological labyrinth so hostile that just trying to navigate it can kill you. Madagascar is a crazy place, home to some of the most unique animals in the world and some of the most breathtaking landscapes. It's the fourth largest island on earth. Its culture is entirely separate from the rest of East Africa, blended with deep French architectural influences. Madagascar has old colonial vibes, lemurs for days, and several stone forests known to the islanders as Tsingy. The word Tsingy means where one cannot walk barefoot. It's a name as much as a warning. Tsingy refers to the tall rock formations spread throughout the island according to thin needle-like tips. A single misstep while wandering a stone Tsingy forest could, and this is no joke, leave you impaled like you just had a bad meeting with Vlad Dracul. The Tsingy de Bemaraha is a UNESCO World Heritage Site and the largest Tsingy forest in the country. The reserve it occupies covers 375,600 acres of stone spheres and razor-sharp cathedrals of rock. Some of these pinnacles reach more than 2,500 feet above the ground. It's not all doom and death though. The Tsingy is home to a lot of endangered flora and fauna. Lemurs live here and so do plenty of other creatures who have adapted to life on top of daggers. But just how did this incredible forest form? And why on the island of Madagascar specifically? NASA says it began to form 200 million years ago. It happened when the remains of seashells, marine plants, and other ocean life got crushed beneath the weight of the sea and then smushed into beds of limestone. Then, when the waters receded 5 million years ago, the remaining rock was left to be brained on. The rain slowly ate away at the solid mass of limestone, gradually sharpening the stone into points and razor edges. Today, the forest of limestone needles is still in the process of being worn down to nothing. But it's at the stage where everything is sharp and pointy and dangerous and a five-minute stroll can mean death. But according to Madagascan lore, the very first humans on the island lived inside the stone forest and they didn't seem to mind. Legend has it the first humans reached Madagascar 2,500 years ago from Indonesia. These initial settlers are known as the Vazimba and they occupy a central part of Madagascar's folklore. The Vazimba supposedly lived on fruit, eating whatever the land gave them. Their kings would dye their hair red, using local mushrooms as a sign of their royal status. These folks also brought from Indonesia the tradition of ancestor worship. Indonesia is all about ancestor worship, especially in ancient times. Across Southeast Asia and the Asian mainland, ancestor worship was and still is a key part of the culture. In Europe, it was all about the gods and offering sacrifices and gifts to deities. But in Asia, it was all about offering gifts to your ancestors so that the spirits would bless your journey. The fact that Madagascan burial traditions are so similar to ancient Indonesian practices makes it feel like the original settlers did come from Asia. Those early inhabitants left a few traces of themselves behind, but not many. Madagascar is dotted with ancient tombs that scientists haven't even looked at because they are in such difficult locations. Everything on this island is so mysterious and spooky that some believe the Vazimba weren't real humans, but rather spirits who dwelled within the Tsingy. These monster spirits were said to have elongated faces, fangs, and weirdly large lips. They lived in the Tsingy, in the dark tunnels between sharp towers. To this day, people in Madagascar do not bring garlic or pork close to those ancient tombs I mentioned since the spirits apparently hate it and will curse anyone who does. The mystery of the Tsingy isn't how they were formed or why they're so deadly. Scientists already know. The mystery of the Tsingy are the Vazimba. Did these mysterious people come from Indonesia to live inside the stone forests? Or could there have been an unknown species of human living on Madagascar when the first Homo sapiens arrived? In Indonesia, there were tiny humans known as Homo floresiensis, also known as hobbits. This was a real human species that lived on the island of Flores and likely on nearby islands as well. Scientists nicknamed them hobbits because they were no bigger than hobbits from the Lord of the Rings, and maybe even shorter. Homo floresiensis on average stood at 3 feet 7 inches tall. They thrived in Indonesia, living their best lives alongside other pygmy species up until 50,000 years ago. That's when Homo sapiens arrived. It's unclear if modern humans violently exterminated their biologically smaller cousins. Scientists don't know if they were assimilated, conquered, or ran out of food because the greedy Homo sapiens took it all. Either way, they ultimately died out. Point being, if such a human species existed in Indonesia, a place that has been heavily studied by scientists, why couldn't they have existed on Madagascar as well? Considering how little archaeological work has been done in Madagascar, it wouldn't surprise me if the bones of an extinct human species are present but haven't been found. Most people don't realize how few skeletons exist from other ancient human species. Many, like the Denisovans, are only known through a handful of specimens. Fewer than a dozen Denisovans have ever been found, and often the only thing left are their teeth. And maybe the mythical Vizimba did live in the Tsingy Stone Forest, hiding from modern humans as they slowly, maybe not even realizing it, went extinct. Is this Atlantis? In the Sahara Desert is one of the planet's most unusual geological features. It's known as the Richat Structure, a natural marble that looks like an eye emerging from the sand. Tucked away in the middle of nowhere in Mauritania, this formation was discovered nearly a hundred years ago, but it was never photographed until astronauts in orbit spotted it during the Cold War. The most recent images of the Richat Structure were captured this March, and the resolution is better than ever. But no matter how good the resolution gets, scientists still can't seem to solve the mystery. Geologists describe the Richat Structure as a But to those searching for the world's ultimate legendary city, its striking circular layout suggests something far more extraordinary. Is the eye of the Sahara just a quirk of nature? Or are we staring directly at the ruins of Atlantis? According to Adam Voiland, the man behind the recent NASA images, the structure was a dome. Then, as the erosion slowly caused the dome to collapse, it developed circular ridges known as These are the individual rings you see within the structure. Voiland said the orange and gray colors are from the differences in rock types across the structure. Each of those rings is a different type of rock, so it's a different color. But if you ask conspiracy theorists, they'll tell you the Richat Structure's rings are actually the different layers of Atlantis. Around 350 BC, Greek philosopher Plato laid out the legend of Atlantis in his dialogues to Maus and Critias. He packed his account with vivid details, never giving an exact coordinate, but providing more than enough clues to spark centuries of endless speculation. Geographically, the Richat Structure sits right where Plato suggested, near the Atlas Mountains and beyond the Pillars of Hercules. But it isn't just its location that gets people talking. It's those massive, impossible rings. Plato claimed the Atlanteans built a series of circular moats around the core of their capital, with each moat increasing in width. The city was a giant circle ringed by moats, with bridges and tunnels carved into rings of rock so that boats could easily pass through them. Every passage into the city was guarded by huge gates and towers, with the walls constructed of red, white, and black rock. If Plato's story is to be believed, the city of Atlantis looks something like this. It's an artistic representation done by Rocío Espín Pinar. Obviously, the eye of the Sahara doesn't look like that. It's also not an island. And Plato said specifically that Atlantis was an island. But Plato was talking about a place that supposedly existed more than 12,000 years ago, and more than 9,000 years before he was born. Back then, the Sahara was still green, lush, vibrant, and home to human civilizations. The Sahara goes through a regular cycle of humidity and dryness. Rains will come and douse the sands for a few thousand years, growing forests and grasslands. Animals enter the region, and northern Africa becomes paradise. But then, when the dry cycle comes, all that greenery dies and is overtaken by sand, pushing the animals and the people into more habitable zones, like the Nile Valley. The Sahara hasn't been green for at least 5,500 years. Maybe Plato described the city as an island because it had become an island in an increasingly hostile desert. Perhaps as the landscape changed, Atlantis became an island oasis in a dying world. It's definitely a theory, but is it a realistic one? On the ground, the Rechat structure is 25 miles across, about the same size as Atlantis based on its description. Initially discovered in the 1930s, the structure was thought to be an impact crater, like many of the places I've told you about. Later research in the 1960s eliminated that possibility and replaced cosmic impact with volcanic activity. Eventually, scientists settled on an explanation. The structure was a dome of molten rock millions of years ago that was reshaped and eroded by wind and rain. Nobody is debating that the Eye of the It's 100% natural. The argument is that the Atlanteans built their city into the natural formation on purpose and used its rings to help design their city. Obviously, this is a natural feature, but it also matches the location of Atlantis. So how do we reconcile both truths? The answer is an excavation. If scientists would go to the Rechat structure and do a small contained excavation, it could either prove or disprove the theory in an instant. So why does this theory stick around? Honestly, because the Eye of the Sahara gives us something pretty rare, a real place on a map that actually looks like the legend. Since nobody's gone out there with a shovel to do a proper dig, the door is wide open for our imaginations to run wild. And really, it's just a fun reminder of how much lost history might still be hiding out in plain sight. Pennsylvania's Ringing Rocks. It's mind-blowing that in the 21st century, there are still places on Earth that science can't fully explain. And Pennsylvania's Ringing Rocks are right at the top of that list. Walk into this quiet park in Bucks County and the first thing you'll notice is the sound, an eerie metallic clanking echoing through the trees. But nobody's out there hitting steel pipes. At Pennsylvania's Ringing Rocks Park, the rocks resonate to make a sound like a bell when they get hit. It's a fascinating phenomenon that lures people to the park where they walk around and test which rocks make strange noises and which ones don't. Not all of the rocks here ring like a bell, but a lot do. Geologist Dr. Brett McLaurin from Commonwealth University said ringing rocks are a dense sort of igneous rock that seem to resist erosion better than the other rocks. Let's get geological. Over thousands of years, the freeze-thaw cycle in Pennsylvania caused the bedrock to fracture. The fractured bedrock created huge boulder fields, and some of those boulders make a ringing noise when struck. But not all, so why not? Dr. Brett said to think of it like a church bell. The rock rings because it's able to vibrate freely enough that it produces sound. The boulders that don't make a noise can't move, either because they're wedged tightly in or stuck to the bedrock. The others that are just loose enough to wriggle are the ones that vibrate when you hit them, creating a bell-like ring. However, there is no single fixed explanation for why they ring at all. I mean, they ring because they vibrate, but why do they vibrate so much? There are plenty of boulders around the globe that are as loose as these, but they don't ring. Some scientists think it's because of the rock density and mineral composition. Others say it's internal stresses inside the stones. The truth is, they just don't know the specific thing that causes these particular rocks to ring. Thanks for watching! Which of these geological marvels do you want to visit the most, or have you already? Let me know in the comments. Be sure to hit that subscribe button, and I'll see you soon. Bye!