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In the heart scan study, researchers found that the AI model wasn’t actually focusing on the heart itself, where there were few visible differences linked to racial categories. Instead, it drew information from areas outside the heart, such as subcutaneous fat as well as image artefacts – unwanted distortions like motion blur, noise, or compression that can degrade image quality. These artefacts often come from the scanner and can influence how the AI interprets the scan.
Scientists have found genetic evidence of an ancient group of people in Colombia with no modern-day descendants. It’s as if they simply vanished from the face of the Earth. What’s more, they’re also not closely related to the ancient Native American populations that scientists had thought would be their ancestors.
“This is unexpected,” Andre Luiz Campelo dos Santos, an archaeologist from Florida Atlantic University who did not participate in the research, tells Adithi Ramakrishnan at the Associated Press. “Up to this point, we didn’t believe there was any other lineage that would appear in South America.”
An international team of researchers described the discovery in a study published in late May in the journal Science Advances. They analyzed DNA from the bones and teeth of 21 individuals found at five archaeological sites in the Altiplano—the high plains around Bogotá—dating to between 500 and 6,000 years ago. The analyses represent Colombia’s first ancient human genomes ever to be published.
Indeed, the brain is a later extension of the spine. Prior to the development of cogent human thought – the spinal reflex-arc kept humanity alive as much as possible through basic cause and effect conditioning. Later, cogent thought was layered over this process – giving the false impression that the brain (and will-power) is responsible. Reflex-arcs are so quick – there is no time for “thinking”. The reality is that the finger is pierced and moved away from danger PRIOR to any pain being felt. The brain, with all its moralising, would have you believe that logic, reason caused the reflex-arc and its entire existence was to avoid unnecessary pain. I suspect that when this reflex-arc was first laid-down millions of years ago – the then pre-human life-form could not experience the level of pain humans do today – so the avoidance of “pain” cannot be the motivation for the avoidance of danger.
Palaeontologists have identified more than 20 dinosaur and other vertebrate footprints on a rock wall in southwest China’s Sichuan Province, a discovery they say sheds new light on early dinosaur evolution around 200 million years ago.
The tracks were found in the city of Dujiangyan by a hiker last month, and their authenticity was later confirmed by a research team led by Xing Lida, an associate professor at China University of Geosciences (Beijing). It is the first time dinosaur footprints have been reported in Dujiangyan.
Researchers from the Nanjing Institute of Geology and Palaeontology of the Chinese Academy of Sciences conducted a study on the Shibantan Biota, a treasure trove of ancient fossils in Hubei. This fossil biota dates back approximately 550 to 543 million years. They identified several types of burrows made by worm-like animals, indicating that complex animal behaviours were already shaping the seafloor environment nearly 10 million years earlier than previously thought.
The reanalysis further pushes back the divergence time of modern humans — Homo sapiens — whose ancestors are estimated to have lived in Africa around 500,000 years ago, Neanderthals, who lived between 24,000 and 130,000 years ago in Europe, and Homo longi, a species closely related to Denisovans, who thrived from 30,000 to 285,000 years ago across Asia and are the cousins of Neanderthals.
SANGHA KOMMUNE (SSR) 