Late Neolithic collective burial reveals admixture dynamics during the third millennium BCE and the shaping of the European genome
“To conclude, our study of a Late Neolithic burial enables direct, quasi–real-time observation of the trimodal admixture processes in Europe between 3300 and 2600 cal BCE as steppe ancestry people dispersed and mixed with local Neo-ancestry groups or individuals. The generalization of the results obtained from our data suggests that this genomic transformation took place during a period of profound cultural change.”
Oğuzhan Parasayan et al., Late Neolithic collective burial reveals admixture dynamics during the third millennium BCE and the shaping of the European genome. Sci. Adv.10, eadl2468(2024). DOI: https://doi.org/10.1126/sciadv.adl2468
“For a process that’s anything but exotic, ice nucleation remains surprisingly mysterious. Chemists can’t reliably predict the effect of a given impurity or surface, let alone design one to hinder or promote ice formation. But they’re chipping away at the problem.”
Surprised no one has suggested Knowledge Commons https://hcommons.social as an instance that is a haven for scholarly people. Perhaps more in higher education, but K12 educators would be welcome and well taken care of with the good moderation. Formerly Humanities Commons, it has expanded into STEM education and other fields to be more inclusive. Based at Michigan State University, it has government grants and other support to sustain its services.
I also recommend Knowledge Commons for blogging or maintaining a free Website. I was just starting to discuss research repositories and criticizing Academia Edu at https://hcommons.social/@SteveMcCarty/112609326085901837 without having space to suggest open access alternatives like Knowledge Commons. Its repository welcomes teaching materials, syllabi, and all sorts of genres, to which I've been happy to contribute, at https://hcommons.social/@SteveMcCarty
The potential of lacustrine sedimentary ancient DNA for revealing human postglacial recolonization patterns in northern Sweden – a review
“The questions of who the first postglacial peoples, or pioneers, were and where they came from therefore remain unanswered. Previous palaeogenomic analyses from remains from adjacent regions have suggested that two main routes into Sweden could have been taken by the pioneers, one from the SW through modern-day Denmark and Norway, and one from the east via Finland. However, no direct genetic evidence from the pioneers of northern Sweden exists.”
Johnson, E., Regnéll, C., Heintzman, P.D. and Linderholm, A. (2024), The potential of lacustrine sedimentary ancient DNA for revealing human postglacial recolonization patterns in northern Sweden – a review. Boreas. https://doi.org/10.1111/bor.12660
Mathematicians Attempt to Glimpse Past the Big Bang
“Researchers already knew that in a universe with so-called dark energy, but without matter, the start of inflation identified in the BGV theorem is a coordinate singularity that can be eliminated. But the real universe has matter, of course. Might mathematical tricks also make it possible to get around its singularity? The researchers showed that if the amount of matter is negligible compared to the amount of dark energy, then the singularity can be eliminated.”
Mathematicians Attempt to Glimpse Past the Big Bang
“Researchers already knew that in a universe with so-called dark energy, but without matter, the start of inflation identified in the BGV theorem is a coordinate singularity that can be eliminated. But the real universe has matter, of course. Might mathematical tricks also make it possible to get around its singularity? The researchers showed that if the amount of matter is negligible compared to the amount of dark energy, then the singularity can be eliminated.”
Earliest, most distant galaxy discovered with James Webb Space Telescope
“The two earliest and most distant galaxies yet confirmed, dating back to only 300 million years after the Big Bang, have been discovered using NASA’s James Webb Space Telescope (JWST), an international team of astronomers today announced.”
“…what bothers me about this educational approach—the “problem” approach, the “STEAM” (STEM + arts) approach—is what it leaves out. It leaves out the humanities. It leaves out books. It leaves out literature and philosophy, history and art history and the history of religion. It leaves out any mode of inquiry—reflection, speculation, conversation with the past—that cannot be turned to immediate practical ends.”
Fossil viruses hidden in our DNA thousands of years ago could be the cause of depression, study finds
“Ancient DNA present in humans may be linked to major psychiatric disorders like depression, researchers have said.
DNA sequences originating from ancient infections are found in the brain, with some contributing to susceptibility for conditions like schizophrenia, bipolar disorder, and depression, a study found”
Fossil viruses hidden in our DNA thousands of years ago could be the cause of depression, study finds
“_Ancient DNA present in humans may be linked to major psychiatric disorders like depression, researchers have said.
DNA sequences originating from ancient infections are found in the brain, with some contributing to susceptibility for conditions like schizophrenia, bipolar disorder, and depression, a study found_”
Ancient genomes revealed the complex human interactions of the ancient western Tibetans
“Outside the Tibetan Plateau, the western Tibetan Plateau populations interacted with both South and Central Asian populations at least 2,000 years ago, and the South Asian-related genetic influence, despite being very limited, was from the Indus Valley Civilization (IVC) migrants in Central Asia instead of the IVC populations from the Indus Valley.”
Mesmerising microbes: bacteria as you’ve never seen it before – in pictures
“As a side hustle he manipulates and photographs the microbial world; his images are collected in a book, Beautiful Bacteria. Taking bacteria from substances such as wastewater, dental plaque or kimchi, Danino lets them multiply in a petri dish, adding dyes. The results are artworks differing from the digital enhancements often made in scientific photography to make images more informative.”
“The first known calculation of the Earth’s circumference was made 2300 years ago by a man called Eratosthenes. I remember in school, how impressed I was by how accurately the Earth’s circumference was measured such long time ago. Today we’re going to take a closer look on how his calculation was made.”
“The Harvard team established the practical makings of the first quantum internet by entangling two quantum memory nodes separated by optical fiber link deployed over a roughly 22-mile loop through Cambridge, Somerville, Watertown, and Boston.”
Backstabbing, bluffing and playing dead: has AI learned to deceive? – podcast
“Dr Peter Park, an AI existential safety researcher at MIT and author of the research, tells Ian Sample about the different examples of deception he uncovered, and why they will be so difficult to tackle as long as AI remains a black box.”
‘Treat food companies like cigarette companies who are trying to get us addicted’
“Ultra-processed foods are designed to make us overeat and are causing both the obesity and mental health crises in the UK, says scientist and author Tim Spector.”
‘Treat food companies like cigarette companies who are trying to get us addicted’
“Ultra-processed foods are designed to make us overeat and are causing both the obesity and mental health crises in the UK, says scientist and author Tim Spector.”
Thomas Willis (1621-1675) : Neurologist, Chemist, Physician
“Willis is not only credited to be the founder of neurology, but he is also seen as the father of comparative neuroanatomy, as his work, in particular Cerebri anatome and De anima brutorum, compare the human brain with that of other species in ‘search for specific human abilities in cognitive functions’ (Molnár, p. 334).”
Thomas Willis (1621-1675) : Neurologist, Chemist, Physician
“Willis is not only credited to be the founder of neurology, but he is also seen as the father of comparative neuroanatomy, as his work, in particular Cerebri anatome and De anima brutorum, compare the human brain with that of other species in ‘search for specific human abilities in cognitive functions’ (Molnár, p. 334).”
"A Bayesian analysis showed that participants had high expectations and performed descriptively better irrespective of the AI description when a sham-AI was present. Using cognitive modeling, we could trace this advantage back to participants gathering more information."
Agnes Mercedes Kloft, Robin Welsch, Thomas Kosch, and Steeven Villa. 2024. "AI enhances our performance, I have no doubt this one will do the same": The Placebo effect is robust to negative descriptions of AI. In Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI '24). Association for Computing Machinery, New York, NY, USA, Article 299, 1–24. https://doi.org/10.1145/3613904.3642633
"A Bayesian analysis showed that participants had high expectations and performed descriptively better irrespective of the AI description when a sham-AI was present. Using cognitive modeling, we could trace this advantage back to participants gathering more information."
Agnes Mercedes Kloft, Robin Welsch, Thomas Kosch, and Steeven Villa. 2024. "AI enhances our performance, I have no doubt this one will do the same": The Placebo effect is robust to negative descriptions of AI. In Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI '24). Association for Computing Machinery, New York, NY, USA, Article 299, 1–24. https://doi.org/10.1145/3613904.3642633
"A Bayesian analysis showed that participants had high expectations and performed descriptively better irrespective of the AI description when a sham-AI was present. Using cognitive modeling, we could trace this advantage back to participants gathering more information."
Agnes Mercedes Kloft, Robin Welsch, Thomas Kosch, and Steeven Villa. 2024. "AI enhances our performance, I have no doubt this one will do the same": The Placebo effect is robust to negative descriptions of AI. In Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI '24). Association for Computing Machinery, New York, NY, USA, Article 299, 1–24. https://doi.org/10.1145/3613904.3642633