List of All Articles with Tag 'science'

Researchers in Haiti once scanned the brains of three people believed to be long-deceased individuals returning from the dead - or zombies. In a study published in 1997, researchers investigated three such cases, using electroencephalography and DNA testing techniques to try and find a rational explanation for a Haitian Voodoo theory that the spirits of the dead can be captured by sorcerers called bokors, who use these souls to reanimate fresh corpses into zombies who walk around rural areas. One case involved a woman who had died aged 30 and was spotted three years later by family members who recognised her because of a distinctive facial mark. A local court then authorised the opening of the woman’s grave, revealing it to be full of rocks. Describing the 'zombie', the study authors explained that “she kept her head in a lowered position, and walked extremely slowly and stiffly, barely moving her arms.” She was also unable to communicate “but would occasionally murmur some incomprehensible but stereotyped words.” But the scan showed her “electroencephalogram and central nervous system examination were unremarkable” and said she may have had catatonic schizophrenia, but couldn't explain how she came back from the dead. Sign up to our free Indy100 weekly newsletter They proposed that the woman might not have died at all, but may instead have been poisoned by a “neuromuscular toxin” to induce catalepsy and trick relatives into thinking she was dead. A lack of oxygen within the grave may have resulted in brain damage, thus explaining her zombie-like state when she was taken out of the grave. Next, the study described a 26-year-old man who was seen at a local cockfight 19 months after being buried. The man’s uncle was subsequently found guilty of using sorcery to zombify the man, who was then kept chained to a log at his parents’ house. But clinical examinations found nothing weird and the man was diagnosed with “organic brain syndrome and epilepsy.” And DNA testing revealed that he was not even the man who had died shortly beforehand. In a similar case, a 31-year-old woman was identified as a villager who had been dead for 13 years. Once again, however, a medical examination revealed that she was a normal human while genetic analyses showed that she was not the dead individual after all. The study authors concluded that “mistaken identification of a wandering, mentally ill, stranger by bereaved relatives is the most likely explanation.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

The discovery of North America is synonymous with Christopher Columbus, but proof has been found confirming that the Vikings were there hundreds of years earlier. Columbus is said to have “discovered the New World" in 1492 CE, but new analysis has suggested that the Norse people in Greenland were using wood from North America centuries before. Research focused on timber used in Norse sites across Greenland which people lived in between 1000 and 1400. The findings show that some of the wood came from types of trees that were grown outside of Greenland. One was the Jack pine, which is found in Canada. Sign up to our free Indy100 weekly newsletter Archaeologist Lísabet Guðmundsdóttir from the University of Iceland studied the timber and put across his findings in the journal Antiquity. “These findings highlight the fact that Norse Greenlanders had the means, knowledge, and appropriate vessels to cross the Davis Strait to the east coast of North America, at least up until the 14th century,” the study says. “As such, journeys were being made from Greenland to North America throughout the entirety of the period of Norse settlement in Greenland, and resources were being acquired by the Norse from North America for far longer than previously thought.” It’s not the first time that it’s been suggested that Norse communities travelled to north America. Italian texts from the 14th century contain references to Vikings making contact with Markland, which is believed to be on the Labrador coast in Canada. The 13th-century Norwegian text called Konungsskuggsjá also referenced the fact that Greenland at the time wasn’t home to great abundances of natural resources, reading: “Everything that is needed to improve the land must be purchased abroad, both iron and all the timber used in building houses.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Artificial intelligence has unrealistic and often dangerous ideas of what the “perfect” man and woman look like, according to a new study. Chiselled features, olive skin and eight-pack abs are among the features that kept cropping up when three leading AI image generators were tasked with creating “ideal” male and female bodies. The challenge was put to the popular programmes Dall-E 2, Stable Diffusion, and Midjourney by eating disorder awareness group the Bulimia Project, which separated its request into two parts. First up, it asked the generators to come up with pictures of men and women based specifically on beauty standards set by social media. Sign up for our free Indy100 weekly newsletter Although it churned out quite a few different options, it showed a number of noticeable biases. Nearly all of the images featured petite women – with Midjourney named as the worst culprit – and all of the men looked like photoshopped versions of bodybuilders. The three AI favoured women with blonde hair and men with brown hair, and nearly half of the male images had facial hair. After analysing their findings based on social media, the Bulimia Project team broadened the scope of the task. This time, they asked the programmes to base their creations on images from across the internet. The main difference between the two categories was that the social media set was “far more sexually charged”, according to the study’s authors. The social media images also featured “largely disproportionate body parts”, which the Bulimia Project described as “unsettling”. “We can only assume that the reason AI came up with so many oddly shaped versions of the physiques it found on social media is that these platforms promote unrealistic body types, to begin with,” it said. “In the age of Instagram and Snapchat filters, no one can reasonably achieve the physical standards set by social media. So, why try to meet unrealistic ideals? It’s both mentally and physically healthier to keep body image expectations squarely in the realm of reality.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Are your grandparents up very early in the morning, without fail? Well, it turns out there are scientific reasons why older people wake up earlier as they get older. It’s been revealed that in later life, the natural process of ageing leads to changes in the times the body approaches sleep. According to HuffPost, our approach towards resting and amount of sleep we require is down to both genetics and our age. Cindy Lustig, who is a professor of psychology at the University of Michigan, said: “Like most of the things that change with age, there’s not just one reason, and they are all interconnected.” Sign up to our free Indy100 weekly newsletter It’s all to do with the brain becoming less responsive as people age to factors such as sunlight, social cues and physical activity which indicate where in the day we are at any given time. “The wiring of the brain is likely not sensing... and responding to the inputs as well as it should because it’s an ageing brain,” Dr. Sairam Parthasarathy, the director of the Center for Sleep and Circadian Sciences at the University of Arizona Health Sciences, also told the publication. “These are all what we call time givers, or they give time to the brain,” he said. In other words, they help the brain sense where it is in the 24-hour circadian cycle. Younger people can more easily connect indicators like eating dinner with the idea of sleeping in the next few hours. However, that’s not as easy for older people to register naturally, especially as their vision tends to suffer in later life. “Interestingly, one of [the reasons] seems to be that the vision changes that come with age reduce the intensity of the degree of light stimulation that our brain receives, which plays an important role in ‘setting’ our circadian clock and keeping it on track,” said Lustig. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

It’s not quite the lost city of Atlantis, but scientists have just uncovered a slice of history that had been swallowed up by the sea. Experts admitted that even they were surprised when divers unearthed a 7,000-year-old stone road that had lain buried under layers of sea mud. The ancient structure was discovered after archaeologist Igor Borzić, of the University of Zadar, spotted “strange structures” nearly 16 ft (5m) underwater in the Bay of Gradina, off the coast of Croatia. The submerged road once linked the island of Korčula to an artificial, prehistoric settlement that belonged to a maritime culture known as the Hvar. Sign up for our free Indy100 weekly newsletter The university released footage of the incredible finding over the weekend. It showed the passageway which consisted of stacked stones and measured some 12 ft (around 4m) across. Archaeologists believe people walked this road “almost 7,000 years ago”, with radiocarbon dating of wood near the site suggesting the settlement may have been built around 4,900 BC. “In underwater archaeological research of the submerged neolithic site of Soline on the island of Korčula, archaeologists found remains that surprised them,” the University of Zadar said in a Facebook statement. “Namely, beneath the layers of sea mud, they discovered a road that connected the sunken prehistoric settlement of the Hvar culture with the coast of the island of Korčula.” Borzić and his team also discovered another “almost identical” settlement on the other side of Korčula Island. Neolithic artefacts including a stone axe, cream blades and sacrificial fragments, were found at the site which lay at a depth of 4-5m. Understandably, the researchers were delighted and, as they continue to delve into their nation’s past, we wonder what else they’ll unearth. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Scientists have revealed they had found a way to combine the technology of brain scans and artificial intelligence to transcribe “the gist” of people’s thoughts. Alex Huth, an assistant professor of neuroscience and computing science at the University of Texas at Austin, and a co-author on the new study published in Nature Neuroscience, said that ‘this is a real leap forward.’ The study was led by Huth and Jerry Tang, a doctoral student in computer science. The main development from this study is that it’s non-invasive. This means that subjects do not require surgical implants. Instead, brain activity is measured using a functional magnetic resonance imaging (fMRI) scanner. Sign up to our free Indy100 weekly newsletter In the study, individuals listened to hours of podcasts in the scanner. Then, given the participant’s consent to have their thoughts decoded, they listened to a new story and the machine-generated corresponding texts from brain activity. It’s not a word-for-word transcript. For example, when an individual heard the phrase ‘I don’t have my driver’s licence yet’, the model decoded the individual’s thoughts to read as ‘she has not even started to learn to drive yet.’ Even when participants thought up their own stories, the machine was able to decode their thoughts still. Tang acknowledged that the advancements made in the study had the potential for negative aftermath. Tang said, ‘we take very seriously the concerns that it could be used for bad purposes and have worked to avoid that.’ They ran tests that highlighted that unless the machine had been trained on an individual’s particular brain activity, it could not decode its thoughts. An individual had to allow for the machine to train their brain activity over a long period of time inside a fMRI scanner for it to work. Researchers also found that it was easy to ‘sabotage’ the machine. Three participants were told to tell a different story in their mind, or count by seven, while listening to one of the podcasts. The study highlights even more development with artificial intelligence, after the popularity of OpenAI’s Chat GPT has sparked debate around the potential of AI. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Humans in Europe may have mastered fire long before we previously thought. According to a study published in Scientific Reports, humans made the discovery around 245,000 years ago, up to 50,000 years earlier than scientist thought previously. Researchers studied samples from the Valdocarros II, a huge archaeological site found east of Madrid, Spain. Using chemical analysis, they found certain compounds that show things were burnt by fire in "organised" social events, rather than through accidents or wildfires. "We have found definitive evidence of things being burnt and those remains are organised into a pattern, suggesting it's humans who are making and controlling the fire. Either they were using the fire to cook or to defend themselves. Sign up to our free Indy100 weekly newsletter The spatial patterning in the fire tells us that they were encircling something, like a home or sleeping area, a living room or kitchen, or an enclosure for animals," Dr. Clayton Magill, study author and Assistant Professor at Heriot-Watt University in Scotland, said in a statement. Dr Magill added that this new work helps to fill in the gaps in our understanding of human-controlled fire and human development. "This is important because our species is defined by our use of fire," Dr Magill explained. "Being able to cook food to feed our big brains is one of the things that made us so successful in an evolutionary sense. Fire also brings protection and fosters communication and family connection. And we now have definitive, incontrovertible evidence that humans were starting and stopping fires in Europe about 50,000 years earlier than we suspected." Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Nasa scientists have found a planet they believe is covered by active volcanoes. In a study published in the journal Nature, scientists said they found the planet, which is the size of Earth about 90 light-years from Earth in the Crater constellation. They called it LP 791-18 d and one part is constantly scorched by sunlight, while the other is always in darkness. “The day side would probably be too hot for liquid water to exist on the surface. But the amount of volcanic activity we suspect occurs all over the planet could sustain an atmosphere, which may allow water to condense on the night side,” Björn Benneke, one of the astronomers who studied the planet, told NASA’s Jet Propulsion Laboratory. Sign up to our free Indy100 weekly newsletter The LP 791-18 system contains at least two other planets, called LP 791-18 b and c. The latter is two-and-a-half times larger than Earth and more than seven times its mass. It also affects the orbit of LP 791-18 d, making it travel along an elliptical path around the system’s sun. That path means LP 791-18 d is deformed every time it completes an orbit. “These deformations can create enough internal friction to substantially heat the planet’s interior and produce volcanic activity at its surface,” according to NASA. “A big question in astrobiology, the field that broadly studies the origins of life on Earth and beyond, is if tectonic or volcanic activity is necessary for life,” study co-author Jessie Christiansen said. “In addition to potentially providing an atmosphere, these processes could churn up materials that would otherwise sink down and get trapped in the crust, including those we think are important for life, like carbon.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

When most people picture New York City, it’s likely that its many skyscrapers are one of the first things that come to mind, but now, scientists are concerned that the city is sinking under their weight. It comes after the findings of a new study observed subsidence of the footprint after the geology beneath the city was modelled and compared to satellite data. The study was conducted by geologist Tom Parsons from the United States Geological Survey and colleagues from The University of Rhode Island, who found that, under the weight of its multiple skyscrapers, NYC is sinking by one to two millimetres per year. Subsistence can occur due to shifting soft sediments and the sheer weight of the load on the ground pushing it down. The study calculated that there are over 1 million buildings in NYC with a cumulative mass of approximately 764,000,000,000 kilograms. Sign up to our free Indy100 weekly newsletter While a few millimetres of subsidence per year might sound like nothing, some parts of the city are subsiding faster – with calculations putting a sample site in lower Manhattan at 294 millimetres. To calculate the rates of subsidence, experts compared their modelling with satellite data that measured the land surface height. The scientists warn that thought must be given to low-lying cities such as NYC, which is home to 8 million people, particularly given rising sea levels and increasing flood risks. Parsons explained: “The point of the paper is to raise awareness that every additional high-rise building constructed at coastal, river, or lakefront settings could contribute to future flood risk.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

The crash sites of unidentified flying objects (or UFOs) are often mysterious in themselves, but even more so when you reportedly find what is simply described as “tiny spheres” akin to “cosmic sperm” in the area in question. Well, that’s what journalist George Knapp found when he obtained documents – some classified – from the Russian military into UFOs, something the Soviet government at the time had batted aside based on the view it was nothing but “Western propaganda”. Referring to a discovery from biologist Yuri Simakov of small balls discovered from the soil of landing sites, Knapp told the Weaponised podcast: “The impressions they made of the soil were pretty dramatic and it doesn’t look like anything that we fly, and he shared that with us. “He gave us all that information and then he found these little orbs. These tiny little perfect spheres … they were opaque. “They were sort of reddish orangish colour and he called them ‘cosmic sperm’. He thought they were some kind of a biological mechanism – some kind of seeds – and he gave me half of the world’s known supply of cosmic sperm and I brought them back.” We can’t believe we had to write that, and you probably can’t believe you just read that, but here we are. Sign up to our free Indy100 weekly newsletter Though if you’re wondering where the not-safe-for-work (NSFW) spheres are now, it turns out he sent them to Dr Thomas Hartmann at the University of Nevada, who confirmed there was nothing biological about the ‘spheres’. Knapp never got the spheres back though, so they’re likely still over there somewhere, yet to be retrieved. We think that’s probably for the best though, George, if we’re being perfectly honest. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

If you weren’t scared of the ocean already, you probably will be after seeing this... A ‘death pool’ has been discovered at the bottom of the Red Sea that instantly kills everything that swims inside it. The pool was found by University of Miami researchers and measures a whopping 107,00 square feet. It’s a long way down, having been discovered 1.1 miles beneath the surface of the inlet of the Indian Ocean found between Africa and Asia. It has been there for an awfully long time, too. The pools are thought to have been formed from pockets of minerals which were deposited up to 23 million years ago. Sign up to our free Indy100 weekly newsletter The reason it’s so deadly? It contains no oxygen. Instead, it’s filled with brine and the salt solution is deadly to most things that enter it. Researcher Sam Purkis told Live Science: “Any animal that strays into the brine is immediately stunned or killed.” He also said that the pool is “among the most extreme environments on Earth.” It’s used by some creatures for food, with Purkis saying that: “Fish, shrimp and eels appear to use the brine to hunt.” Predators position themselves on the peripheries of the pool in order to “feed on the unlucky” creatures that die after swimming into it. While it’s not the first brine-filled pool under the sea discovered by scientists in the Red Sea, it is the closest to land. It can be found just 1.25miles off the coast of Egypt, while the previous closest pool was more than 15 miles away from land.Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Plastic containers are usually still covered in water after they’ve been through the dishwasher. Blame science—not your dishwasher.