depths

Mining waste is changing life in the depths of the Pacific

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More than a thousand meters below the Pacific, a turbid cloud slowly disperses. It is not pollution visible from the surface, but it could transform the ocean from its foundations. That cloud—a mix of sediment, metals, and mining waste—is the byproduct of a new global fever: the race for minerals from the seabed. A recent study published in Nature warns of a little-known risk. By extracting metals from the seabed, underwater mining releases a cloud of waste as fine as dust. This material can replace the food that millions of small organisms need to survive. They are tiny, almost invisible creatures, but without them there would be no fish, whales or marine life as we know it. A deep problem. A team from the University of Hawaii at Mānoa analyzed for the first time the effects of a test spill made during a mining operation in the Pacific. Researchers discovered that the waste generated by extracting polymetallic nodules – potato-sized rocks packed with valuable metals such as nickel, cobalt or manganese – can drown the so-called “twilight ocean”, an area that extends between 200 and 1,500 meters deep. The results are overwhelming: the particles from the mining process are between 10 and 100 times less nutritious than natural particles. “It’s like replacing food with air,” explains Michael Dowdlead author of the study. Their work shows that this waste can displace organic particles that feed zooplankton and other species that, in turn, support fish, whales and tuna. The study, carried out in the Clarion-Clipperton Zone – a vast region of the Pacific of 1.5 million square kilometers under license from the International Seabed Authority (ISA) – calculated that 65% of the species analyzed depend on particles larger than six microns, exactly those that would be replaced by mining waste. More than half of the zooplankton and 60% of the micronekton feed on them. The journey of waste. During the process, underwater mining generates a flow of water, sediment and metals that is pumped to a ship on the surface. There the valuable minerals are separated and the rest of the material – a mixture of mud and inorganic fragments – is returned to the sea. The problem is where it is returned. Some companies, such as The Metals Company (TMC), have proposed release the residue in the so-called “mesopelagic zone”, an area rich in microscopic life. According to scientists, this could cause a “cascade effect”: organisms that filter particles to feed would run out of nutrients, and the predators that depend on them—from fish to cetaceans—could migrate or starve. That is why the authors recommend that, if companies insist on mining, they at least return the sediments to the seabed, where they were extracted, even if that is more expensive and technically complex. However, from the company, which financed the study but did not intervene in its conclusions, he assured The Verge which plans to release the waste at a depth of about 2,000 meters, below the area analyzed by the researchers. According to its environmental director, Michael Clarke, the particles dissipate quickly and there is less planktonic life at those depths. The rules of the fund: the battle in the ISA. The rules of the seabed are still being written in slow motion. Regulation falls to the International Seabed Authority (ISA), the UN body in charge of managing mineral resources in international waters. Since 2014, the ISA has been working on a Mining Code that has not yet been approved. For now, it has only granted exploration licenses, but none for commercial exploitation. Meanwhile, some countries are pushing to move forward without waiting for the final code. In fact, Donald Trump has tried to bypass the international process signing an executive order that allowed US companies to be granted permits to mine the seabed. The measure has been seen by ISA Secretary General Leticia Carvalho as a “dangerous precedent that could destabilize ocean governance.” A geopolitical board in dispute. American interest is framed in the technological and trade war with China. The Asian giant controls about 70% of the global rare earth market and has multiple exploration contracts in the Clarion-Clipperton Zone. Faced with this dependence, the White House seeks to guarantee its own supply of strategic metals by promoting deep-sea mining and creating national reserves, but the country has not ratified the United Nations Convention on the Law of the Sea (UNCLOS). In other words, the United States not part of the ISA. Meanwhile, countries such as Norway, Japan, Papua New Guinea and China are moving forward with their projects. At the last ISA meeting, 32 nations—including Spain—requested a global moratorium to curb underwater mining until its impacts are better understood. Between two waters. The fate of the seabed is written at the same time in the laboratories and in the negotiation rooms, far from the blue silence thatwe still don’t fully understand. The little we know is that beneath that darkness await the metals of the future and perhaps also the price of extracting them. Image | Unsplash Xataka | When it seemed that the controversy over underwater mining was calming down, the discovery of black oxygen threatens to reactivate it

The depths of Antarctica had always been a mystery, so far: 3,000 “mega -structures”

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An international team of scientists, with the researcher at the University of Barcelona David Amblàs at the head, He has revealed A much more complex and detailed map of the Antarctic Sea Fund. Using the most complete database to date, they have identified 3,291 individual cannons organized in 332 systems, some of which sink up to 4,000 meters deep and that act as supermarine superautistapistas that regulate the global climate, and at the same time, represent the Achilles heel of the gigantic glaciers of the icy continent. The map that has changed everything. Until now, our vision of the seabed surrounding Antarctica was blurred. The maps were based In low resolution data that barely suggested the largest structures. But everything has changed thanks to the new ‘International Bathymetric Chart of the Southern Ocean (IBCSO) V.2‘, a cartography that has combined thousands of ship polls with satellite data. Taking advantage of this “Google Maps” of the Antarctic Sea bed, scientists applied semi -automatic hydrological techniques, similar to those used to analyze river basins on the mainland. In this way, they managed to trace with amazing precision the entire network of “rivers” and “submarines” submarine that cross the continental margins of the continent. Two types of very different geographies. The finding with this system reveals two types of underwater geography. On the one hand, you have the ‘Eastern Antarctica‘Where very branched and -shaped cannon systems are found, which determines that its origin is very old. On the other hand, there is the ‘Western Antarctica‘Where shorter cannons predominate with abrupt slopes and V sections, which allows to see a more recent geological origin. For Amblàs, This difference so marked in geomorphology “It supports the hypothesis that the eastern ice layer is older and formed before the western one.” This is something that until now had only been able to intuit. Visual representation of the applied methodology for the extraction of the streams in the seabed. Water highways that decide our future. These cannons are not just a geographical accident. They are leading actors of climate change. On the one hand, they act as channels for the water of the continental platform, which when cooled and gain salinity, becomes very dense. . This water is precipitated by the cannons to the depths of the ocean, in a process that forms the Background Antarctic Water (AABW). This mass of cold and dense water is the engine of global oceanic circulation, a gigantic “conveyor belt” that distributes heat throughout the planet and kidnaps huge amounts of carbon dioxide in the deep ocean. The geometry of these cannons, therefore, is essential for climate regulation. The Achilles heel of the glaciers. On the other hand, these same cannons are an entrance door for the enemy. Allow him to Circumpolar deep water (CDW), a relatively warm mass of water (about 2 ° C above the freezing point) and saline, sneaks from the open ocean to the base of the ice platforms. This warm water flow is the main responsible for the basal melting of the glaciers, eroding them from below and accelerating their slide to the sea. The discovery of such a dense cannon network, especially in Eastern Antarctica (considered so far stable), suggests that The vulnerability of the continent The oceanic warming could be greater than what the models foresee. Regions such as the Amundsen Sea, home of the final judgment glacier, are full of these cannons that serve the warm water in tray. The great challenge: that our climatic models understand it. In addition, this discovery shows an important career: the climatic models that we currently use to project future scenarios are not able to simulate precisely. The topography is so rugged that the predictions on the dynamics of the oceans and the weather lose reliability, especially in areas as vulnerable as the Amundsen Sea. Therefore, the two authors of this study underline the urgency of continuing to invest in the high resolution mapping of these unexplored areas. The second researcher, Riccardo Arosio, concludes that “new cannons will surely be revealed” and each of them is essential to be able to make more precise climatic models that determine the future of the planet. Antarctica is a well of surprises. There are many investigations that focus on the planet’s location, and the conclusions are very interesting. We already know that in the past Where there is now ice was a real forestor that under its surface Something is sending a sign that science fails to clarify. And this has done that Tourism has arrived at this placesomething that is not sitting too well. Images | Cassie Matias In Xataka | Thousands of marine ecosystems depend on only one thing: the pis and the whale droppings

We believed that the “road of yellow tiles” was a private cinema. Until some divers descended to the depths

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The idea of the yellow tile road was born with the novel The Wonderful Wizard of Oz by L. Frank Baum (1900), where a golden path is described that leads to the Emerald city and symbolizes the trip to personal fulfillment and discovery. In the famous adaptation to the 1939 cinema, that path became a visual icon thanks to the pioneering use of Technicolor: the bright yellow contrasted with the intense green of the city and the blue sky, marking the passage of Dorothy from Kansas’s gray routine to a fantasy world. It turns out that in marine depths we had Another way of tile. A geological finding. History dates back to 2022. During the Luʻuaaahikikekumu expeditiona scientific team aboard E/V Nautilus shipwhile exploring the chain of old submarine volcanoes of Liliʻuokalani Ridge, he ran into Rocking formation that remembered the mythical “road of yellow tiles” of the cinema. The curious structure, located at the top of the submarine nootka, within the National Marino Monument Papahānaumokuākeait turned out to be an example of ancient volcanic geology: rock fragments generated by high -energy eruptions, known as hyaloclastitethat have fractured uniformly due to repeated cycles of heating and cooling by successive eruptions. This pattern, similar to the cracked of the surface of a Brownie, has conferred the rock an appearance of perfectly aligned cobblestone. Origins and characteristics. Hialoclastite is formed when hot magma comes into contact with water, fragmenting into vitreous particles and accumulating in the seabed. Over time, these deposits are compacted and cemented, and, in cases like this, exposed to thermal changes that They produce rectilinear fissures. The found sector showed a stretch of “baked scab” dry to touch, An optical effect that surprised the team and generated jokes on the “road to the Atlantis.” The inspection with the nautilus robotic arm allowed to collect samples from Ferromanganésic scabs (rich in iron and manganese oxides) that covered the background, a resource of scientific and industrial interest. Importance of the mission. That was the First systematic exploration Of these submarine mountains, whose main objective is to understand the mysterious discontinuity that presents its alignment in the ocean bed. The finding of “road” joined other unique observations of the expedition, such as the filming of a strange agency nicknamed Headless Chickn Monsterstrengthening the idea that the area houses poorly documented biological and geological phenomena. Beyond the visual anecdote, the identification and study of these formations provides key information about the Submarine eruptive processes and the tectonic evolution of the region, opening the door to new discoveries in one of the most remote and protected areas of the planet. Scientific context. He find It was also framed in an international effort to map and understand the underwater structures that make up the hidden geography of the oceans. The formation of the “path” in Nootka Seamount Not only illustrates how volcanic activity can generate visually striking patterns, but also offers clues about the systems behavior submarine magmatic and its interaction with water in High energy environments. Plus: These studies are essential to improve underwater volcanism models, evaluate potential mineral resources and understand how these geological habitats influence deep marine biodiversity, a field in which each expedition reveals more unknowns than certainties. Image | E/V Nautilus In Xataka | We know more than Mars than the seabed. An expert helps us to understand why it is still an enigma and what mysteries keep In Xataka | The Atlantic has a ‘lost city’ with the key to life on other planets. Now is in danger

Scientists launched a cow at the depths of the China Sea. They discovered eight unexpected visitors to the feast

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The ocean is full of surprises. Sometimes, as happened several years ago in Canada, the enigmas appear floating in the form of human feet adrift. However, in others, most, you have to go down to the depths to try to solve the mysteries. That was precisely what a group of researchers proposed. It all started by throwing the body of a cow. A cow at 1,600 meters. In one of the most unusual marine experiments carried out, a group of scientists He threw a dead cow at 1,629 meters deep in a continental slope of the South China Sea, in front of the Chinese island of Hainan, with the aim of simulating the sinking of a whale and studying the Behavior of scavengers of deep water. What they found surprised even the most experienced researchers: Eight sleepy sharks Pacific (Somniosus pacificus) They appeared in the place, marking the first documented observation of this species in the region. The finding not only unexpectedly expands the distribution map of this elusive shark, but also provides valuable information about its behavior patterns, food hierarchies, physiological adaptations and its possible geographical expansion. An unexpected visitor. Although the Pacific Sleeping Shark is a species with a wide distribution in the north of the Pacific Ocean (from Japan to Alaska and to the south to Baj real extension of its habitatits possible displacement due to climate change or even the existence of a stable population and not yet registered in that region. Food label. The recorded images By underwater cameras they not only confirmed their presence, but revealed unusual behavior for large predators: a kind of Shift systemin which sharks aligned to feed the body, giving the place to other individuals who approached from behind. This type of “Food label”rarely observed in predatory species, suggests that the order in food could be determined by the competitive intensity of each individual, instead of a chaotic struggle for resources, which would indicate a more complex level of social organization that was suspected in these animals. New clues. He study He also documented variations in behavior according to body size. The specimens that exceeded 2.7 meters in length were much more aggressive and direct In the attack on the carrion, while the smallest sharks opted for cautious movements, surrounding the body in circles before approaching. The employer suggests that even in an environment where food is scarce and random opportunities, sleepy sharks could have developed a coexistence strategy with hierarchical ranges that minimize direct conflict. One More Thing. Another remarkable finding was a behavior of Ocular retraction observed during feeding. Since this species lacks Iglestop membrane (The protective “third tab” that other vertebrates such as cats or certain reptiles have), researchers believe that this retraction reflects a Evolutionary adaptation To protect the eyes during bites or struggles, which brings a new data on the defensive physiology of these sharks in their natural environment. The unknown. And more, since the recordings also showed other revealing aspects. Namely: several sharks carried visible parasites In his eyes, identified Like copepodsalthough it was not possible to precisely classify the species. This detail reinforces biological parallelism among the sleeping sharks of the Pacific and their best -known relatives, the Greenland sharkswhich also usually host parasites in their visual organs. Apart from sharks, the experiment attracted a surprising variety of abyssal fauna, such as Caracol fish and numerous amphipodsall attracted by the source of decomposition organic matter. These records confirm that the deep areas of the South China Sea not only house a biodiversity still little documented, but could be more productive of what was believed so far, against the idea that tropical depths are biologically poorer than their polar counterparts. The great unknown. In the background, the presence of these sharks raises a crucial issue: is it a recent expansion of its rank due to global warming, or has it always been part of its habitat and simply had never been observed? It is known that the species has occasionally appeared in such remote regions like Palaos or the Solomon Islandswhich suggests that there could be more southern populations than the scientific literature indicates. However, the “frequent appearance” in the southwest of the China Sea, According to the team itself Researcher led by Han Tian, rather suggests a structural lack of data in a little explored region rather than a recent change in the distribution pattern. In that sense, the experiment with the body of Vaca has not only contributed a specific observation, but has opened a way to review key concepts on the marine biogeography of abyssal species. Know the depths. He find It underlines the usefulness of simple experiments, but carefully designed to obtain data on remote environments, inaccessible already often little understood. The idea of simulating a whale sinking with a cow was not only effective, but proved to be a powerful Ecological magnet able to reveal complex biological interactions. In a context where Climate change and Human activity They are altering ecosystems even at great depth, this type of research is crucial to understand the invisible functioning of the deep ocean. The appearance of eight sleeping sharks where no one was waiting for them, behaving with order, measured aggressiveness and sophisticated adaptive mechanisms, is one more proof that marine depths They keep secrets that we are barely beginning to understand. Image | Ocean-Lond-Atmosphere Research (2025) In Xataka | A Canadian coast had been receiving human feet for years. Science has resolved mystery In Xataka | Carnivorous crustaceans, devouring worms and missing bodies: the scientific mystery of the caimanes at the bottom of the sea

comes from the depths of Antarctica

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On earth have always given enigmas to those who do not find an answer. In some cases yes, such as when we decipher the strange television signal that came from the sky, but In othersas in the story that concerns us, the mystery continues. In one of the most remote and extreme environments of the planet, a great altitude scientific globe flying over Antarctica has captured radio signals that seem to come from the depths of the earth. It all started 20 years ago. A signal from ice. As we said, for almost two decades, a series of scientific balloons has overwhelmed the vast Antarctic desolation to more than 40 kilometers of altitudecarrying with him instruments designed to capture distant echoes from the universe. We talk about Anita experimentpromoted by an international consortium of physicists trying detect neutrinosthose particles without load, practically without mass, that cross the matter without a trace. Billions of them constantly cross our bodies without us noticing them and, nevertheless, their detection is an extraordinary achievement: when one of them interacts with an ice molecule, it can trigger a rain of secondary particles that emit brief pulses of radio waves. Anita was created for that. But since its deployment, ha captured something else. Inexplicable signals. In it year 2006and then again In 2014Anita detected radio pulses that seemed to come not from above (as expected with cosmic rays) but From belowfrom inside the ice. The waves arose at very inclined angles, up to 30 degrees under the surface, and showed no reflex signs. The problem? That, according to the laws of physics known, that It shouldn’t be possible: To emerge from those depths, a particle should have crossed thousands of kilometers of solid rock before releasing a detectable signal, something that neutrinos usually usually achieves. And yet the data were there. The comparison with other neutrinic detection projects did not yield coincidences. What Anita was capturing was real … But inexplicable. Anita The border of the known. Scientists initially thought they could be facing Tau neutrinosa variant that, crossing Antarctic ice, can generate tau leptons and trigger the so -called “air rains”, emissions that Anita is specially designed to detect. But the angles, the intensities and the frequency of the signals They did not match with the predictions of the standard model. Stephanie Wissel, Astrophysics of Penn State and one of the authors of the new studyrecognized that, although these signs could be confused with neutrinic events, everything points They are not. If they were conventional neutrinos, they should have gone through the entire planet without interacting with anything, which, although technically possible, would be statistically miraculous. Beyond the standard. And here comes the most fascinating. The most disconcerting hypothesis is also the More suggestive: That these signs come from particles that do not appear in current theories. Some experts have proposed that they could be related to The dark matter or with interactions not yet described. Other theories They point to possible unknown effects of propagation of radio waves In polar ice, perhaps influenced by atmospheric, topographic or electromagnetic conditions of the Antarctic environment. That said, and so far, none of these ideas has been able to reproduce experimentally or find parallel evidence. The silence of the other detectors and the absence of compatible patterns reinforce the anomalous nature of these pulses. The promise of the successor. With Anita retired since 2016, the scientific community now deposited its hopes In Pueo (Payload for Ultrahight Energy Observations), a new more sensitive and robust aerial experiment than its predecessor. Designed by the same team, Pueo will have a Best angular resolution And he will be able to capture weaker or subtle signals, which could confirm whether the abnormalities detected are recurring events or simple fortuitous errors. Wissel and his team hope that Pueo can not only capture new similar events, but also elucidate its nature And, in the best case, expand the limits of what we understand today by particle physics. A persistent enigma. One thing is clear: the Mystery remains. The signs detected By Anita They do not fit neutrinos, they do not correspond to known phenomena and have not been able to reproduce. In other words: what is there is an explanatory vacuum, a series of data that challenges our more solid theories. As I said Wissel herselfmaybe we are facing a phenomenon of propagation of unknown radio, or maybe not. Anita’s case represents one of those unique moments in science: when observation is ahead of the theory, and the instruments detect something that the mind cannot still understand. Thus, in the vast cold silence of Antarctica, something seems to be talking. And we have no idea what he is telling us. Image | Penn State In Xataka | In 1960 a strange sound was detected under the waters of Antarctica. Not only do we still have no response: it is multiplying In Xataka | Why the appearance of thousands of lakes in Antarctica is another disastrous sign for our future

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