Jump to content

The Making of Our Alien Earth: The Undersea Volcanoes of Santorini, Greece


Recommended Posts

  • Publishers
Posted
14 Min Read

The Making of Our Alien Earth: The Undersea Volcanoes of Santorini, Greece

On the deck of a ship, a large A-frame style crane is lifting a submersible research vehicle into the air, as crew members hold taglines connecting to the vehicle, preparing to deploy it into the ocean.
The expedition team and crew prepare to deploy Nereid Under Ice (NUI) into the sea.

The following expedition marks the third installment of NASA Astrobiology’s fieldwork series, the newly rebranded Our Alien Earth, streaming on NASA+. Check out all three episodes following teams of astrobiologists from the lava fields of Holuhraun, Iceland, to the Isua Greenstone Belt of Greenland, and finally, the undersea volcanoes of Santorini, Greece. And stay tuned for the lava tubes of Mauna Loa, Hawaii in 2025.

THE VOYAGE BEGINS

My career at NASA has always felt like a mad scientist’s concoction of equal parts hard work, perseverance, absurd luck, and happenstance. It was due to this mad blend that I suddenly found myself on the deck of a massive tanker ship in the middle of the Mediterranean sea, watching a team of windburnt scientists, engineers, and sailors through my camera lens as they wrestled with a 5,000lb submersible hanging in the air.

On the deck of a ship, a large A-frame style crane is lifting a submersible research vehicle into the air, as crew members hold taglines connecting to the vehicle, preparing to deploy it into the ocean.
The expedition team and crew prepare to deploy Nereid Under Ice (NUI) into the sea.

“Let it out, Molly, slack off a little bit…” shouts deck boss Mario Fernandez, as he coordinates the dozen people maneuvering the vehicle. It’s a delicate dance as the hybrid remotely operated vehicle (ROV), Nereid Under Ice (NUI), is hoisted off the ship and deployed into the sea. “Tagline slips, line breaks… you’ve got a 5,000lb wrecking ball,” recounts Mario in an interview later that day.

How did I get here?

A few years ago I found myself roaming the poster halls of the Astrobiology Science Conference in Bellevue, Washington, struggling to decipher the jargon of a dozen disciplines doing their best to share their discoveries; phrases like lipid biomarkers, anaerobic biospheres, and macromolecular emergence floated past me as I walked. I felt like a Peanuts character listening to an adult speak.

Until I stumbled upon a poster by Dr. Richard Camilli entitled, Risk-Aware Adaptive Sampling for the Search for Life in Ocean Worlds. I was quickly enthralled in a whirlwind of icy moons, fleets of deep sea submersible vehicles, and life at sea.

A middle-aged white man with a grayish-blonde beard smiles and stands on the deck of a ship, sun setting behind him. He is wearing a hat with a sailboat on it, and a gray NASA shirt.
Dr. Richard Camilli, principal investigator of a research expedition to explore undersea volcanoes off the coast of Santorini.

“Are you free in November?”

“Absolutely,” I replied without checking a single calendar.

Five months and three flights later, I arrived at the port of Lavrio, Greece, as Dr. Camilli and his team were unloading their suite of vehicles from gigantic shipping crates onto the even more massive research vessel. I stocked up on motion sickness tablets, said a silent farewell to land, and boarded the ship destined for the undersea Kolumbo volcano.

Greece is a great place to study geology, because it’s a kind of supermarket of natural disasters.

Dr. Paraskevi NomikoU

Dr. Paraskevi NomikoU

University of Athens

A large research ship in the lower right corner is making its way towards the horizon, as the sun sets casting rose-colored light across clouds in the sky. On the left of the image, an island is in the distance.
The expedition sets out to sea as the sun sets in the distance.

LIFE AT SEA

Documenting astrobiology fieldwork has taken me to some pretty remote and rough places. Sleeping in wooden shacks in Iceland without running water and electricity, or bundled up in a zero-degree sleeping bag in a tent while being buffeted by gale force winds in the wilderness of Greenland. But life at sea? Life at sea is GOOD.

I was fortunate to have a personal cabin all to myself: a set of bunk beds, a small bathroom with a shower, and a small desk with plenty of outlets for charging my gear. I would also be remiss if I didn’t mention the mess hall. Aside from a freshly rotated menu of three hot meals a day, it was open 24/7 with a constant lineup of snacks to keep bellies full and morale high. This was luxury fieldwork. The ability to live, work, and socialize all in the same place would make this trip special in its own right, and allowed me to really get to know the team and capture every angle of this incredibly complex and multi-faceted expedition.

The ship in the port of Lavrio, Greece. The team will spend two full days docked here while preparing for the voyage ahead.
NASA Astrobiology/Mike Toillion

SEARCHING FOR LIFE ON OCEAN WORLDS

“The goal of this program is cooperative exploration with under-actuated vehicles in hazardous environments,” explains Dr. Camilli as we stand on the bow of the ship, the sun beginning to set in the distance. “These vehicles work cooperatively in order to explore areas that are potentially too dangerous or too far away for humans to go.”

This is the problem at hand with exploring icy ocean worlds like Jupiter’s moon, Europa. The tremendous distance between Earth and Europa means we will barely be able to communicate and control vehicles that we send to the surface, and will face even more difficulty once those vehicles dive below the ice. This makes Earth’s ocean a perfect testbed for developing autonomous, intelligent robotic explorers.

“I’ve always been struck at how parallel ocean exploration and space exploration is,” says Brian Williams, professor from the Computer Science and Artificial Intelligence Laboratory at MIT. “Once you go through the surface, you can’t communicate. So, somehow you have to embody the key insights of a scientist, to be able to look and see: is that evidence of life?”

An underwater view of a torpedo-shaped research vehicle with wings, called a glider, moves just under the surface of the ocean.
One of the gliders, an autonomous scouting vehicle equipped with multple sensors to map the seafloor and report back to the ship.
NASA Astrobiology/Mike Toillion

MEET THE FLEET

Exploring anywhere in space begins with a few simple steps: first, you need to get a general map of the area, which is typically done by deploying orbiters around a celestial body. The next step is to get a closer look, by launching lander and rover missions to the surface. Finally, in order to understand the location best, you need to bring samples back to Earth to study in greater detail.

“So you can think of what we’re doing here as being very parallel, that the ship is like the orbiter and is giving us a broad view of the Kolumbo volcano, right? Once we do that map, then we need to be able to explore interesting places to collect samples. So, the gliders are navigating around places that look promising from what the ship told us. And then, it looks to identify places where we might want to send NUI. NUI is very capable in terms of doing the samples, but it can’t move around nearly as much. And so, we finally put NUI at the places where the gliders thought that they were interesting.”

The expedition team works into the night preparing NUI for its upcoming mission to the Kolumbo volcano.
NASA Astrobiology/Mike Toillion

THE SCIENTIST’S ROBOTIC APPRENTICE

As the espresso machine in the mess hall whirred away pouring out a much needed shot of caffeine, I sat with Eric Timmons, one of the expedition’s computer science engineers. Eric wears a few hats on the ship, but today we are discussing automated mission planning, the first step to true autonomy in robotic exploration.

“In any sort of scientific mission, you’re going to have a list of goals, each with their own set of steps, and a limited amount of time to achieve them. And so, Kirk works on automating that.” Kirk is the nickname of one of the many algorithms involved in the team’s automated mission planning. It’s joined by other algorithms, all named after Star Trek characters, collectively known as Enterprise, each responsible for different aspects of planning a mission and actively adapting to new mission parameters.

Dr. Richard Camilli explains further: “Basically, we have scientists onboard the ship that are feeding policies to these automated planners. [The planners] then take those policies plus historical information, the oceanographic context, and new information being transmitted by the vehicles here and now; they take all that information, and combine it to construct a mission that gets to the scientific deliverables, while also being safe.”

These are areas that humans aren’t designed to go to. I guess the best analogy would be like hang gliding in Midtown Manhattan at night.

Dr. richard camilli

Dr. richard camilli

Woods Hole Oceanographic Institution

OK, let’s recap the story so far: the ship’s sonar and other instruments create a general map of the Kolumbo volcano. That information, along with data from previous missions, is fed to Enterprise’s team of algorithms, which generates a mission for the gliders. The gliders are deployed, and using their sensors, provide higher-fidelity data about the area and transmit that knowledge back to the ship. The automated mission planners take in this new data, and revise their mission plan, ranking potential sites of scientific interest, which are then passed onto NUI, which will conduct its own mission to explore these sites, and potentially sample anything of interest.

DIVE, DIVE, DIVE

After a few days on the ship, the routine of donning my steel-toed boots and hard hat when walking around the deck has started to become second nature. My drone skills have greatly improved, as the magnetic field produced by the ship and its instruments forced me to take-off and land manually, carefully guiding the drone in and around the many hazards of the vessel. This morning, however, I’ve been invited to step off the ship for the first time to get a first-hand look at deploying the gliders. Angelos Mallios from the glider team leads me down into the bowels of the ship to the lower decks, as we arrive at a door that opens to the outside of the ship, waves lapping about six feet below. A zodiac pulls up to the door and we descend down a ladder into the small boat.

Riding in the zodiac with the glider team, led by Angelos Mallios.
NASA Astrobiology/Mike Toillion

Meanwhile, the rest of the glider team is on the main deck of the ship, lifting the gliders with a large, motorized crane, and lowering them onto the surface of the water. The zodiac team approached to detach the glider and safely set it out into the sea, while I dipped a monopod-mounted action camera in and out of the water to capture the process. Unbeknownst to me at the time, this would become some of my favorite footage of the trip, sunlight dancing off the surface of the waves, while the gliders floated and dove beneath.

Angelos’ radio began to chatter. Eric Timmons was onboard the ship ready to command the gliders to begin their mission plan assigned by Enterprise. A moment passed and the yellow fin of the glider dipped below the water’s surface and disappeared.

A hard-hat wearing scientist leans out of a zodiac boat to gently deploy an autonomous torpedo-shaped vehicle with wings, called a glider, into the ocean off the coast of Santorini, Greece.
Angelos Mallios from the Woods Hole Oceanographic Institution, leans out of a zodiac to deploy a glider, an autonomous vehicle and the forward scout for the expedition.

NUI VERSUS THE VOLCANO

The following day, it was time to see the star of the show in action; the expedition team was ready to deploy the aforementioned 5,000lb wrecking ball, NUI. The gliders had been exploring the surrounding area day and night, using their suite of sensors to detect areas of scientific interest. Since this mission is about searching for life, the gliders know that warmer areas could indicate hydrothermal vent activity; a literal hotspot for life in the deep ocean. Kirk, along with the science planner algorithm, Spock, determined a list of possible candidates that fit that exact description.

Four members of the expedition team wearing hard hats, lean against the wall of the ship's deck watching the deployment of the ROV Nereid Under Ice.

“There’s always a bit of tension in the operations, where, do you go strike out in an area that is unstudied and potentially come back with nothing? Or do you go to a site that you know and try to understand it a little bit more, that kind of incremental advance?” Dr. Camilli pauses to take a quick swig of sparkling water after a long day of diving operations, as he recounts a moment in the control room earlier that day. All the scientists onboard this expedition are extremely skilled and knowledgable, and this mission is asking them to put aside their instincts, and follow the suggestions of computer algorithms; a hard pill to swallow for some.

Underwater footage from Nereid Under Ice, showing a thriving community on the sea floor, including a never before seen species.
NASA Astrobiology/Mike Toillion and WHOI

“We stuck with the Spock program, and it paid great dividends. And all of the scientists were amazed at what they saw. The first site that we went to was spectacular. The second site we went to was spectacular. Each of the five sites that it identified as interesting were interesting, and they were each interesting in a different way; totally different environments.”

Interesting, in this case, was quite the understatement. As the expedition team and I crowded into the ship’s control room to look at the camera feeds transmitted by NUI, now fully deployed to the seafloor, audible gasps erupted from multiple people. Bubbles filled the monitor as live fumaroles, active vents from the volcano, were pouring out heat and chemical-rich fluid into the water. Thick, microbial mats covered the surrounding rock, and multicellular lifeforms dotted the landscape. The expedition team had found a live hydrothermal vent, and life thriving around it.

SOUVENIRS FROM THE OCEAN FLOOR

“I’ve never seen anything like that before,” recalls Casey Machado, expedition lead and the main pilot for Nereid Under Ice (NUI). Casey is sitting in an office chair surrounded by glowing monitors, a joystick in their left hand, and a gaming controller in their right. Since NUI is a hybrid ROV, it can be controlled manually from the ship by remote, or receive autonomous instructions from the Enterprise mission planners. Today, the team plans on manually controlling NUI to retrieve samples from the first site of interest.

NUI is a strange looking vehicle. Only a small section of its body is watertight, where many of its critical components are housed. The remainder is fairly open, and upon arriving at the first site recommended by Spock, the front of the ROV opens up its front double doors to reveal a multi-jointed manipulator arm, stereo camera set, and other instruments. I’m instantly reminded of the space shuttle mission to repair the Hubble Space Telescope, which had a similar mechanism.

Casey Machado, pilot of the hybrid ROV Nereid Under Ice (NUI), pilots the manipulator arm to take a rock sample.
NASA Astrobiology/Mike Toillion

Casey deftly maneuvers each joint of the arm to approach a rock covered in microbial mats. The end of NUI’s arm is equipped with two sampling instruments: a claw-like grabbing mechanism and a vacuum-like hose called the “slurp gun”. The end of the arm twists and turns as Machado aligns it with the rock, eventually opening and closing it around the target. With a gentle pull, the rock comes loose, and with a few more careful manipulations places it delicately into NUI’s sample cache. I offer a high-five, which Casey nonchalantly returns like the whole task was nothing.

TEACHING A ROBOT TO FISH

At this point, the expedition team has collected dozens of samples and achieved multiple engineering milestones, enough to fill years’ worth of scientific papers, but they are far from finished. A true mission to an ocean world will have to be pilotless, as Dr. Gideon Billings from MIT explains: “They need to operate without any human intervention. They need to be able to understand the scene through perception and then make a decision about how they want to manipulate to take a sample or achieve a task.”

Gideon sits in the control room to the left of the piloting station, working alongside Casey as they prepare to demonstrate NUI’s automated sampling capabilities. His laptop screen shows a live 3D-model of the craft, its doors open, arm extended. Projected around the craft is a 3D reconstruction, or point cloud, of the seafloor created from the stereo camera pair mounted inside the vehicle. Similarly to how our brains take the two visual feeds from both of our eyes to see three-dimensionally, a stereo camera pair uses two cameras to achieve the same effect. By clicking on the model and moving its position in the software, NUI performs the same action thousands of meters under the ocean.

Two men face away from the camera looking at a computer monitor, as a 3D model of a submersible vehicle is displayed.
Shared autonomy between the automated sampling team and the ROV Nereid Under Ice.

“That is shared autonomy, where you could imagine a pilot indicating a desired pose

for the arm to move to, but then a planner taking over and coming up with the path that the arm should move to reach that goal. And then, the pilot just essentially hitting a button and the arm following that path.”

Over the course of multiple dives, Gideon tested various sampling techniques, directing the manipulator arm to use its claw-like device to grab different tools and perform a variety of tasks. “We were able to project the point cloud into that scene, and then command the arm to grab a push core and move it into a location within that 3D reconstruction. We verified that that location matched up. That showed the viability of an autonomous system.” This seemingly small victory is a huge step towards exploring planets beyond Earth. Since this expedition, the engineering team has not only improved this shared autonomy system, but has also implemented a natural language interface, allowing a user to use their normal speaking voice to give commands to the ROV, further blurring the lines between reality and science fiction.

The sun rises over the Mediterranean Sea on the final day of the research cruise.
NASA Astrobiology/Mike Toillion

SOMEWHERE BEYOND THE SEA

I cannot help but envy the life of those who chose to make the ocean their place of work. The time I’ve spent with oceanographers has me questioning all my life choices; clearly they knew something I didn’t.

Watching the sunrise every morning, peering through the murky depths of the deep sea, unlocking the secrets of Earth’s final frontier. All in a day’s work for Dr. Richard Camilli and his team of intrepid explorers.

Watch Our Alien Earth and The Undersea Volcanoes of Santorini, Greece on NASA+ and follow the full story of this incredible expedition.

An ultrawide panorama of a sunrise at sea. The foreground shows a still ocean with minimal waves, receding to a small island on the horizon, with bright yellow and orange clouds against a blue sky.
Panorama of a sunrise at sea.

View the full article

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By USH
      In recent months, Earth has been experiencing a string of bizarre and unsettling phenomena. Massive power outages have struck Spain and Portugal, with similar blackouts occurring across the globe. Aircraft have inexplicably crashed or fallen from the sky. Lights - streetlamps, billboards, car headlights, even indoor lighting are flickering erratically, and the problem persists. 

      Power failures have disrupted air traffic control centers. Strange, unexplained noises have been heard coming from the sky. In parts of the U.S., blue rain has reportedly fallen. The Schumann Resonance, Earth’s natural electromagnetic frequency, has spiked dramatically. Most disturbing of all, now birds have been seen suddenly dropping dead, either mid-flight or while perched on power lines. 
      It feels as if the planet is enveloped in a powerful, unseen force, an invisible energy field swarming the Earth, disrupting both man-made and natural systems. But where is it coming from? 
      One theory suggests that we may be experiencing the delayed impact of a massive astronomical event that occurred thousands of years ago, such as a supernova, the cataclysmic explosion of a dying star. These cosmic blasts release enormous amounts of electromagnetic radiation, including gamma rays and X-rays, which can travel across space for thousands or even millions of years before reaching other celestial bodies, like Earth. 
      Interestingly, some scientists have speculated that a gamma-ray burst from a distant supernova might have triggered the Ordovician mass extinction around 440 million years ago. If such radiation can wipe out entire ecosystems, could a similar event be silently influencing the strange phenomena we're seeing today? 
      It might sound improbable, but what if Earth is now being bathed in residual energy from a long-past cosmic event, energy that is only just now arriving and interacting with our atmosphere and technology? 
      And if that's true… could these strange occurrences be the early signs of something even more serious to come? 
      Additional: MrMBB333, a well-known YouTuber, is also closely following these remarkable events. He shares daily live footage from around the world and often questions what is truly happening. In his latest video below he shares the mystery of the birds dropping dead while perched on power lines.
         
      You can watch his videos on his YouTube channel: https://www.youtube.com/user/MrMBB333/videosView the full article
    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      When most people think of NASA, they picture rockets, astronauts, and the Moon. But behind the scenes, a group of inventors is quietly rewriting the rules of what’s possible — on Earth, in orbit, and beyond. Their groundbreaking inventions eventually become technology available for industry, helping to shape new products and services that improve life around the globe. For their contributions to NASA technology, we welcome four new inductees into the 2024-2025 NASA Inventors Hall of Fame

      A robot for space and the workplace

      Myron (Ron) Diftler led the team behind Robonaut 2 (R2), a humanoid robot developed with General Motors. The goal was to create a robot that could help humans both in space and on the factory floor. The R2 robot became the first humanoid robot in space aboard the International Space Station, and part of its technology was licensed for use on Earth, leading to a grip-strengthening robotic glove to help humans with strenuous, repetitive tasks. From factories to space exploration, Diftler’s work has real-world impact. 

      Some of the toughest electronic chips on and off Earth

      Technology developed to one day explore the surface of Venus has to be tough enough to survive the planet where temperatures hit 860°F and the atmosphere is akin to battery acid. Philip Neudeck’s silicon carbide integrated circuits don’t just work — they ran for over 60 days in simulated Venus-like conditions. On Earth, these chips can boost efficiency in wireless communication systems, help make drilling for oil safer, and enable more practical electric vehicles. 
      From developing harder chip materials to unlocking new planetary missions, Neudeck is proving that the future of electronics isn’t just about speed — it’s about survival.

      Hydrogen sensors that could go the distance on other worlds

      Gary Hunter helped develop a hydrogen sensor so advanced it’s being considered for a future mission to Titan, Saturn’s icy moon. These and a range of other sensors he’s helped developed have applications that go beyond space exploration, such as factory floors here on Earth.
      With new missions on the horizon and smarter sensors in development, Hunter is still pushing the boundaries of what NASA technology can do. Whether it’s Titan, the surface of Venus, or somewhere we haven’t dreamed of yet, this work could help shape the way to get there. 

      Advanced materials research to make travel safer

      Advanced materials, such as foams and composites, are key to unlocking the next generation of manufacturing. From space exploration to industry, Erik Weiser spent years contributing his expertise to the development of polymers, ceramics, metals, nanomaterials, and more. He is named on more than 20 patents. During this time, he provided his foam expertise to the Space Shuttle Columbia accident investigation, the Shuttle Discovery Return-to-Flight Investigation and numerous teams geared toward improving the safety of the shuttle.  
      Today, Weiser serves as director of the Facilities and Real Estate Division at NASA Headquarters, overseeing the foundation of NASA’s missions. Whether it’s advancing research or optimizing real estate across the agency, he’s helping launch the future, one facility at a time.

      Want to learn more about NASA’s game changing innovations? Visit the NASA Inventors Hall of Fame.
      Read More Share
      Details
      Last Updated May 09, 2025 Related Terms
      Technology Technology Transfer Technology Transfer & Spinoffs Explore More
      3 min read Key Portion of NASA’s Roman Space Telescope Clears Thermal Vacuum Test
      Article 2 days ago 4 min read NASA Enables SPHEREx Data Return Through Commercial Partnership
      Article 3 days ago 6 min read NASA Data Helps Map Tiny Plankton That Feed Giant Right Whales
      In the waters off New England, one of Earth’s rarest mammals swims slowly, mouth agape.…
      Article 4 days ago Keep Exploring Discover More Topics From NASA
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      NASA’s Glenn Research Center in Cleveland provides ground test facilities to industry, government, and academia specializing in the following: 
      Acoustics  Engine Components Testing  Full-Scale Engine Testing  Flight Research  Icing Research  Materials and Structures  Microgravity  Space Power and Propulsion  Wind Tunnels  Electromagnetic Interference Laboratory  Our unique facilities offer superior customer service, flexible scheduling, and state-of-the-art testing capabilities. 
      Facility Request Process 
      Customer contacts the facility manager and/or submits a test request form. See below for the Facility Request Form.  The facility manager will contact the customer to discuss the request and obtain detailed test requirements.  After test requirements and schedule are finalized, the facility manager will provide a high-fidelity cost estimate for review and prepare a formal agreement for signature.  Once the agreement is signed by both NASA Glenn and the customer, and the work is funded, the test execution may begin per the agreement.  If you need further information about our facility capabilities or the general testing process, please complete the form below to have your inquiry answered or contact Michael McVetta at 216-433-2832. 
      Facility Request Form
      If you are considering testing in one of our facilities or would like further information about a specific facility or capability, please let us know:
      * indicates a required field
      Name* First Last Organization*Work Phone*Work Email* Facility*If you are not sure of the facility you need, simply indicate that below. I'm not sure10×10 Supersonic Wind Tunnel1×1 Supersonic Wind Tunnel8×6 Wind Tunnel9×16 Wind Tunnel2.2 Second Drop TowerAero-Acoustic Propulsion LaboratoryAdvanced Subsonic Combustion RigCombined Effects ChamberElectric Propulsion LaboratoryElectric Propulsion Research BuildingElectromagnetic Interference LaboratoryEngine Research Building and Related FacilitiesFlight Research BuildingHypersonic Tunnel FacilityIcing Research TunnelIn-Space Propulsion FacilityPropulsion Systems LaboratoryStructural Dynamics LaboratoryStructural Static LaboratoryZero Gravity Research FacilityAdditional CommentsNameThis field is for validation purposes and should be left unchanged. View the full article
    • By European Space Agency
      Image: Part of the Italian island of Sardinia is featured in this image captured by the Copernicus Sentinel-2 mission. View the full article
    • By USH
      The Curiosity rover continues to capture fascinating anomalies on the Martian surface. In this instance, researcher Jean Ward has examined a particularly intriguing discovery: a disc-shaped object embedded in the side of a mound or hill. 
      The images were taken by the Curiosity rover’s Mast Camera (Mastcam) on April 30, 2025 (Sol 4526). To improve clarity, Ward meticulously removed the grid overlay from the photographs, enhancing the visibility of the object. 
      To provide better spatial context for the disc’s location, Ward assembled two of the images into a collage. In the composite, you can see the surrounding area including a ridge, and the small mound where the disc appears partially embedded, possibly near the entrance of an opening. 

      The next image offers the clearest view of the anomaly. Ward again removed the grid overlay and subtly enhanced the contrast to bring out finer details, as the original image appeared overly bright and washed out. 
      In the close-up, displayed at twice the original scale, the smooth arc of the disc is distinctly visible. Its texture seems unusual, resembling stone or a slab-like material, flat yet with a defined curvature. 

      Might this disc-like structure have been engineered as a gateway, part of a hidden entrance leading to an architectural complex embedded within the hillside, hinting at a long-forgotten subterranean stronghold once inhabited by an extraterrestrial civilization? 
      Links original NASA images: https://mars.nasa.gov/raw_images/1461337/ https://mars.nasa.gov/raw_images/1461336/https://mars.nasa.gov/raw_images/1461335/
        View the full article
  • Check out these Videos

×
×
  • Create New...