Listen to the terrifying sound of Earth's north and south poles 'flipping' 780,000 years ago - as experts warn another flip could be imminent
They completely flip, meaning the North pole becomes the South, and vice-versa.
The last full reversal took place approximately 780,000 years ago – leaving some experts to predict another flip is imminent.
Now, researchers have created a terrifying soundscape to represent the chaos of this event.
Using paleomagnetic data – the record of Earth's ancient magnetic field preserved in rocks – from around the globe, scientists have constructed a model of the magnetic field before, during and after this historic reversal.
They also created a musical piece – a 'soundscape' – to represent the haunting sounds of the flip, called the Matuyama-Brunhes reversal.
The team, from the Helmholtz Centre for Geosciences in Potsdam, Germany, used three violins and three cellos to create a 'disharmonic cacophony' that mirrors the complex dynamics of a flip.
The clip starts off as melodic and makes for pleasant listening as it represents the poles while stable. However, it sounds more erratic and eerie as the magnetic fields begin to flux and change.
Researchers have created a terrifying soundscape to represent the chaos of this event. The left part of the animation represents the magnetic field is a relatively stable state, however, the right represents it in a total state of flux, with the poles completely scrambled
Earth is surrounded by a system of magnetic fields called the magnetosphere. This shields our home planet from harmful solar and cosmic particle radiation, but it can change shape in response to incoming space weather from the Sun. Pictured: an artist's impression
Earth's magnetic field is generated by the roiling liquid metals deep beneath the crust.
It extends from the Earth's interior into space, acting like a protective shield by diverting harmful charged particles from the Sun away from our planet.
A flip doesn't happen overnight but takes place gradually, over centuries to thousands of years.
If a magnetic flip were to happen again, some experts claim it could render parts of Earth 'uninhabitable' by knocking out power grids.
Communication systems could be seriously disrupted, and compasses would point south – meaning Greenland would be in the southern hemisphere and Antarctica in the North.
While it sounds terrifying, and would leave life on our planet exposed to higher amounts of solar radiation, it's unlikely to cause catastrophic events or mass extinctions.
Last year, researchers also transformed readings of an epic upheaval of Earth's magnetic field that took place some 41,000 years ago.
The Laschamp event saw our planet's magnetic North and South poles weaken, with the magnetic field tilting on its axis.
What is Earth's magnetic field?
Earth's magnetic field is a layer of electrical charge that surrounds our planet. The field protects life on Earth because it deflects charged particles fired from the sun known as 'solar wind'.
Without this protective layer, these particles would likely strip away the Ozone layer, our only line of defence against harmful UV radiation.
Scientists believe the Earth's core is responsible for creating its magnetic field. As molten iron in the Earth's outer core escapes it creates convection currents. These currents generate electric currents which create the magnetic field.
The soundscape was captured using data from a constellation of European Space Agency satellites.
Researchers mapped the movement of Earth's magnetic field lines during the event and produced a stereo sound version using natural noises including wood creaking and rocks falling.
The noises in the video represent a time when the Earth's magnetic field was at just five per cent of its current strength.
While the Earth's magnetic field did return to normal – over the course of around 2,000 years – its strength has decreased again by 10 per cent over the past 180 years, experts have found.
However, a mysterious area in the South Atlantic has emerged where the geomagnetic field strength is decreasing even more rapidly.
The area is called the South Atlantic Anomaly and has seen satellites malfunctioning over it several times due to exposure to highly charged particles from the sun.
This has led to speculation that Earth is heading towards a magnetic pole flip.
However, some experts have provide reassurance that the poles aren't going to flip anytime soon.
Researchers previously pieced together data on Earth's geomagnetic field strength stretching back 9,000 years and say there's no evidence a reversal is on the cards.
'We have mapped changes in the Earth's magnetic field over the past 9,000 years, and anomalies like the one in the South Atlantic are probably recurring phenomena linked to corresponding variations in the strength of the Earth's magnetic field', said Andreas Nilsson, a geologist at Lund University.
The team analysed burnt archaeological artefacts, volcanic samples and sediment drill cores – all of which carry information about Earth's magnetic field.
Reassuringly, the team's model suggests that the South Atlantic Anomaly will recover of its own accord and is unlikely to trigger the reversal that some have anticipated.
'Based on similarities with the recreated anomalies, we predict that the South Atlantic Anomaly will probably disappear within the next 300 years, and that Earth is not heading towards a polarity reversal', Mr Nilsson said.
The Earth's magnetic field is in a permanent state of change.
Magnetic north drifts around and every few hundred thousand years the polarity flips so a compass would point south instead of north.
The strength of the magnetic field also constantly changes and currently it is showing signs of significant weakening.
Life has existed on the Earth for billions of years, during which there have been many reversals.
There is no obvious correlation between animal extinctions and those reversals. Likewise, reversal patterns do not have any correlation with human development and evolution.
It appears that some animals, such as whales and some birds use Earth's magnetic field for migration and direction finding.
Since geomagnetic reversal takes a number of thousands of years, they could well adapt to the changing magnetic environment or develop different methods of navigation.
Radiation at ground level would increase, however, with some estimates suggesting that overall exposure to cosmic radiation would double causing more deaths from cancer. 'But only slightly,' said Professor Richard Holme.
'And much less than lying on the beach in Florida for a day. So if it happened, the protection method would probably be to wear a big floppy hat.'
The movement of the Earth's magnetic poles are shown in this animation at 10-year intervals from 1970 to 2020. The red and blue lines sjpw the difference between magnetic north and true north depending on where you are standing. On the green line, a compass would point to true north. Credit: NOAA National Centers for Environmental Information
Electric grid collapse from severe solar storms is a major risk. As the magnetic field continues to weaken, scientists are highlighting the importance off-the grid energy systems using renewable energy sources to protect the Earth against a black out.
'The very highly charged particles can have a deleterious effect on the satellites and astronauts,' added Dr Mona Kessel, a Magnetosphere discipline scientist at Nasa.
In one area, there is evidence that a flip is already occurring. 'The increasing strength of the South Atlantic anomaly, an area of weak field over Brazil, is already a problem,' said Professor Richard Holme.
The Earth's climate could also change. A recent Danish study has found that the earth's weather has been significantly affected by the planet's magnetic field.
They claimed that fluctuations in the number of cosmic rays hitting the atmosphere directly alter the amount of cloud covering the planet.
Hashtags
Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
The Independent
11 minutes ago
- The Independent
Study warns of the hidden dangers of ChatGPT
A new study, co-authored by NHS doctors, warns that AI chatbots like ChatGPT could contribute to the onset or worsening of psychotic symptoms in vulnerable users. The research suggests that large language models (LLMs) can "blur reality boundaries", leading to what has been termed "chatbot psychosis". Neuropsychiatrist Hamilton Morrin from King's College London described "chatbot psychosis" as a "genuine phenomenon" that is only beginning to be understood. Co-author Tom Pollack urged AI companies to implement more safeguards and include psychiatrists in their safety teams to address these risks. OpenAI chief Sam Altman has acknowledged the difficulty in implementing effective safeguards for users in a fragile mental state.
Daily Mail
an hour ago
- Daily Mail
Huge breast cancer breakthrough as scientists discover key way to prevent deadly disease
Scientists have discovered how breast cancer spreads to other parts of the body—and it could revolutionise how the disease is treated in its earlier stages. Scottish researchers discovered that cancer changes the metabolism—the way cells make and use energy—of specific immune cells. They found that they release a certain sort of protein, called uracil, which can be used as a 'scaffold' by cancerous cells, allowing them to grow on other organs. Scientists were able to block the uracil-powered scaffold from forming in mice. This restored the ability of the creatures' immune systems to kill secondary cancer cells, and stop the cancer from spreading. The scientists achieved this by blocking an enzyme called uridine phosphorylase-1 (UPP1), which produces uracil. They hope that detecting uracil in the blood may help spot early signs the cancer spreading—and blocking UPP1 with drugs could stop the spread before it even starts. The findings of the study, which was carried out in the labs of Professor Jim Norman and Professor Karen Blyth, were published in the Embo Reports journal. Lead author of the study, Dr Cassie Clarke, said: 'This study represents a major shift in how we think about preventing the spread of cancer. 'By targeting these metabolic changes as early as possible we could stop the cancer progressing and save lives.' Meanwhile, Dr Catherine Elliot, director of research at Cancer Research UK, said: 'Metastasis—when cancer spreads—is a major factor in breast cancer becoming harder to treat, especially if the cancer returns months or even many years later. 'This discovery gives us new hope for detecting and stopping metastasis early and ensuring people have many more years with their families and loved ones.' The research may also help stop the spread of other cancers to other parts of the body, too added Simon Vincent, chief scientific officer at Breast Cancer Now. 'Now we need more research to see if this new insight can be turned into new drugs that stop secondary breast cancer, and potentially other secondary cancers,' he said. The team of researchers at from the Cancer Research UK Institute and University of Glasgow are now testing the ability of drugs to prevent cancer occurring. It comes amid an alarming prediction earlier this year that breast cancer deaths in the UK will soar by more than 40 per cent by 2050. By the same year, globally, another study estimated there will be 3.2million new cases and 1.1million breast-related deaths per year if current trends continue. The disease is far more prevalent in those over 50, which is the age women typically experience the menopause. It is the most common type of cancer in the UK, taking the lives of around 11,500 Britons and 42,000 Americans each year. Early signs of the disease are a lump in the breast, swelling or lump in the armpit, change in size or shape of breasts, discharge of fluid from the nipple. Others include dimpling, a rash or redness on skin, as well as crusting, scaly or itchy skin on the nipple. Despite years of pleas from cancer charities, more than a third of women in the UK still do not regularly assess their breasts. However, it should be part of your monthly routine, so you can notice any unusual changes, charity CoppaFeel previously said. You can check in the shower, when you are lying down in bed or in the mirror before you get dressed. Because breast tissue isn't just found in your boobs, it's also important that men and women check the tissue all the way to their collarbone and underneath their armpit. There is no right or wrong way to check your breasts, as long as you know how your breasts usually look and feel, says the NHS. Breast cancer is one of the most common cancers in the world and affects more than two MILLION women a year Breast cancer is one of the most common cancers in the world. Each year in the UK there are more than 55,000 new cases, and the disease claims the lives of 11,500 women. In the US, it strikes 266,000 each year and kills 40,000. But what causes it and how can it be treated? What is breast cancer? It comes from a cancerous cell which develops in the lining of a duct or lobule in one of the breasts. When the breast cancer has spread into surrounding tissue it is called 'invasive'. Some people are diagnosed with 'carcinoma in situ', where no cancer cells have grown beyond the duct or lobule. Most cases develop in those over the age of 50 but younger women are sometimes affected. Breast cancer can develop in men, though this is rare. Staging indicates how big the cancer is and whether it has spread. Stage 1 is the earliest stage and stage 4 means the cancer has spread to another part of the body. The cancerous cells are graded from low, which means a slow growth, to high, which is fast-growing. High-grade cancers are more likely to come back after they have first been treated. What causes breast cancer? A cancerous tumour starts from one abnormal cell. The exact reason why a cell becomes cancerous is unclear. It is thought that something damages or alters certain genes in the cell. This makes the cell abnormal and multiply 'out of control'. Although breast cancer can develop for no apparent reason, there are some risk factors that can increase the chance, such as genetics. What are the symptoms of breast cancer? The usual first symptom is a painless lump in the breast, although most are not cancerous and are fluid filled cysts, which are benign. The first place that breast cancer usually spreads to is the lymph nodes in the armpit. If this occurs you will develop a swelling or lump in an armpit. How is breast cancer diagnosed? Initial assessment: A doctor examines the breasts and armpits. They may do tests such as a mammography, a special x-ray of the breast tissue which can indicate the possibility of tumours. Biopsy: A biopsy is when a small sample of tissue is removed from a part of the body. The sample is then examined under a microscope to look for abnormal cells. The sample can confirm or rule out cancer. If you are confirmed to have breast cancer, further tests may be needed to assess if it has spread. For example, blood tests, an ultrasound scan of the liver or a chest X-ray. How is breast cancer treated? Treatment options which may be considered include surgery, chemotherapy, radiotherapy and hormone treatment. Often a combination of two or more of these treatments are used. Surgery: Breast-conserving surgery or the removal of the affected breast depending on the size of the tumour. Radiotherapy: A treatment which uses high energy beams of radiation focused on cancerous tissue. This kills cancer cells, or stops them from multiplying. It is mainly used in addition to surgery. Chemotherapy: A treatment of cancer by using anti-cancer drugs which kill cancer cells, or stop them from multiplying. Hormone treatments: Some types of breast cancer are affected by the 'female' hormone oestrogen, which can stimulate the cancer cells to divide and multiply. Treatments which reduce the level of these hormones, or prevent them from working, are commonly used in people with breast cancer. How successful is treatment? The outlook is best in those who are diagnosed when the cancer is still small, and has not spread. Surgical removal of a tumour in an early stage may then give a good chance of cure. The routine mammography offered to women between the ages of 50 and 71 means more breast cancers are being diagnosed and treated at an early stage. For more information visit or call its free helpline on 0808 800 6000 But one of the most popular methods online involves using the pads of your fingers. Examining your entire breast and armpit area, simply, rub and feel from top to bottom of the breast. You should also feel in semi-circles and in a circular motion around your breast tissue to feel for any abnormalities, according to a guide shared in a blog post by the University of Nottingham. Then look in the mirror for any visual lumps, skin texture and changes and changes in nipple shape or abnormal discharge. If you spot any changes, you should get it checked out by your GP. Women aged between 50 and 70 should also be attending routine breast cancer screenings.
The Independent
3 hours ago
- The Independent
New research reveals a secret ingredient in the Neanderthal diet
Scientists long thought that Neanderthals were avid meat eaters. Based on chemical analysis of Neanderthal remains, it seemed like they'd been feasting on as much meat as apex predators such as lions and hyenas. But as a group, hominins – that's Neanderthals, our species and other extinct close relatives – aren't specialized flesh eaters. Rather, they're more omnivorous, eating plenty of plant foods, too. It is possible for humans to subsist on a very carnivorous diet. In fact, many traditional northern hunter–gatherers such as the Inuit subsisted mostly on animal foods. But hominins simply cannot tolerate consuming the high levels of protein that large predators can. If humans eat as much protein as hypercarnivores do over long periods without consuming enough other nutrients, it can lead to protein poisoning – a debilitating, even lethal condition historically known as 'rabbit starvation.' So, what could explain the chemical signatures found in Neanderthal bones that seem to suggest they were healthily eating tons of meat? I am an anthropologist who uses elements such as nitrogen to study the diets of our very ancient ancestors. New research my colleagues and I conducted suggests a secret ingredient in the Neanderthal diet that might explain what was going on: maggots. Isotope ratios reveal what an animal ate The ratios of various elements in the bones of animals can provide insights into what they ate while alive. Isotopes are alternate forms of the same element that have slightly different masses. Nitrogen has two stable isotopes: nitrogen-14, the more abundant form, and nitrogen-15, the heavier, less common form. Scientists denote the ratio of nitrogen-15 to nitrogen-14 as δ¹⁵N and measure it in a unit called permil. As you go higher up the food chain, organisms have relatively more of the isotope nitrogen-15. Grass, for example, has a very low δ¹⁵N value. An herbivore accumulates the nitrogen-15 that it consumes by eating grass, so its own body has a slightly higher δ¹⁵N value. Meat-eating animals have the highest nitrogen ratio in a food web; the nitrogen-15 from their prey concentrates in their bodies. By analyzing stable nitrogen isotope ratios, we can reconstruct the diets of Neanderthals and early Homo sapiens during the late Pleistocene, which ran from 11,700 to 129,000 years ago. Fossils from various sites tell the same story – these hominins have high δ¹⁵N values. High δ¹⁵N values would typically place them at the top of the food web, together with hypercarnivores such as cave lions and hyenas, whose diet is more than 70% meat. But maybe something else about their diet was inflating Neanderthals' δ¹⁵N values. Uncovering the Neanderthal menu We suspected that maggots could have been a different potential source of enriched nitrogen-15 in the Neanderthal diet. Maggots, which are fly larvae, can be a fat-rich source of food. They are unavoidable after you kill another animal, easily collectible in large numbers and nutritionally beneficial. To investigate this possibility, we used a dataset that was originally created for a very different purpose: a forensic anthropology project focused on how nitrogen might help estimate time since death. I had originally collected modern muscle tissue samples and associated maggots at the Forensic Anthropology Center at University of Tennessee, Knoxville, to understand how nitrogen values change during decomposition after death. While the data can assist modern forensic death investigations, in our current study we repurposed it to test a very different hypothesis. We found that stable nitrogen isotope values increase modestly as muscle tissue decomposes, ranging from -0.6 permil to 7.7 permil. This increase is more dramatic in maggots feeding on decomposing tissue: from 5.4 permil to 43.2 permil. To put the maggot values in perspective, scientists estimate δ¹⁵N values for Pleistocene herbivores to range between 0.9 permil to 11.2 permil. Maggots are measuring up to almost four times higher. Our research suggests that the high δ¹⁵N values observed in Late Pleistocene hominins may be inflated by year-round consumption of ¹⁵N-enriched maggots found in dried, frozen or cached animal foods. Cultural practices shape diet In 2017, my collaborator John Speth proposed that the high δ¹⁵N values in Neanderthals were due to the consumption of putrid or rotting meat, based on historical and cultural evidence of diets in northern Arctic foragers. Traditionally, Indigenous peoples almost universally viewed thoroughly putrefied, maggot-infested animal foods as highly desirable fare, not starvation rations. In fact, many such people routinely and often intentionally allowed animal foods to decompose to the point where they were crawling with maggots, in some cases even beginning to liquefy. This rotting food would inevitably emit a stench so overpowering that early European explorers, fur trappers and missionaries were sickened by it. Yet Indigenous peoples viewed such foods as good to eat, even a delicacy. When asked how they could tolerate the nauseating stench, they simply responded, 'We don't eat the smell.' Neanderthals' cultural practices, similar to those of Indigenous peoples, might be the answer to the mystery of their high δ¹⁵N values. Ancient hominins were butchering, storing, preserving, cooking and cultivating a variety of items. All these practices enriched their paleo menu with foods in forms that nonhominin carnivores do not consume. Research shows that δ¹⁵N values are higher for cooked foods, putrid muscle tissue from terrestrial and aquatic species, and, with our study, for fly larvae feeding on decaying tissue. The high δ¹⁵N values of maggots associated with putrid animal foods help explain how Neanderthals could have included plenty of other nutritious foods beyond only meat while still registering δ¹⁵N values we're used to seeing in hypercarnivores. We suspect the high δ¹⁵N values seen in Neanderthals reflect routine consumption of fatty animal tissues and fermented stomach contents, much of it in a semi-putrid or putrid state, together with the inevitable bonus of both living and dead ¹⁵N-enriched maggots. What still isn't known Fly larvae are a fat-rich, nutrient-dense, ubiquitous and easily procured insect resource, and both Neanderthals and early Homo sapiens, much like recent foragers, would have benefited from taking full advantage of them. But we cannot say that maggots alone explain why Neanderthals have such high δ¹⁵N values in their remains. Several questions about this ancient diet remain unanswered. How many maggots would someone need to consume to account for an increase in δ¹⁵N values above the expected values due to meat-eating alone? How do the nutritional benefits of consuming maggots change the longer a food item is stored? More experimental studies on changes in δ¹⁵N values of foods processed, stored and cooked following Indigenous traditional practices can help us better understand the dietary practices of our ancient relatives.
