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À :olivier hartmanshenn

lun. 28 août à 05:32

Dear olivier hartmanshenn,

Here is your customized Science X Newsletter for week 34:

	Visualizing the mysterious dance: Quantum entanglement of photons captured in real-time Researchers at the University of Ottawa, in collaboration with Danilo Zia and Fabio Sciarrino from the Sapienza University of Rome, recently demonstrated a novel technique that allows the visualization of the wave function of two entangled photons, the elementary particles that constitute light, in real-time.
	Paper drinking straws may be harmful and may not be better for the environment than plastic versions, researchers warn "Eco-friendly" paper drinking straws contain long-lasting and potentially toxic chemicals, a new study has concluded.
	Missing topographical elements of Paleolithic rock art revealed by stereoscopic imaging Research led by Complutense University, Madrid, has discovered an array of ancient cave paintings hidden among previously described cave art. In a paper, "Animals hidden in plain sight: stereoscopic recording of Paleolithic rock art at La Pasiega cave, Cantabria," published in Antiquity, the team fills in details missing from previous photographic images.
	Dog brains are tuned to dog-directed speech spoken by women Dogs show greater brain sensitivity to the speech directed at them than to adult-directed speech, especially if spoken by women, according to a new study in Communications Biology.
	Researchers extract ancient DNA from a 2,900-year-old clay brick, revealing a time capsule of plant life For the first time, a group of researchers have successfully extracted ancient DNA from a 2,900-year-old clay brick. Currently housed at the National Museum of Denmark, the clay brick originates from the palace of Neo-Assyrian king Ashurnasirpal II, in the ancient city of Kalhu. Known today as the North-West palace in Nimrud (modern-day northern Iraq), its construction began around 879 BCE.
	Physicists use a 350-year-old theorem to reveal new properties of light waves Since the 17th century, when Isaac Newton and Christiaan Huygens first debated the nature of light, scientists have been puzzling over whether light is best viewed as a wave or a particle—or perhaps, at the quantum level, even both at once. Now, researchers at Stevens Institute of Technology have revealed a new connection between the two perspectives, using a 350-year-old mechanical theorem—ordinarily used to describe the movement of large, physical objects like pendulums and planets—to explain some of the most complex behaviors of light waves.
	First observations ever of the outskirts of a supermassive black hole's accretion disk Nothing can evoke an existential perspective-spiral quite like looking at an image of a galaxy. At first glance, these sublime structures may appear rather serene. But in fact the center of many galaxies is a turbulent environment containing an actively feeding supermassive black hole.
	Newly discovered, primitive cousins of T. rex shed light on the end of the age of dinosaurs in Africa Fossils of primitive cousins of T. rex that had short, bulldog snouts and even shorter arms have been discovered by scientists in Morocco. The two new dinosaur species belong to the Abelisauridae, a family of carnivorous dinosaurs that were counterparts to the tyrannosaurs of the Northern Hemisphere. They lived at the end of the Cretaceous period and show that dinosaurs were diverse in Africa just before their mass extinction by an asteroid 66 million years ago.
	How a cup of water can unlock the secrets of our universe Researchers from Queen Mary University of London have made a discovery that could change our understanding of the universe. In their study published in Science Advances, they reveal, for the first time, that there is a range in which fundamental constants can vary, allowing for the viscosity needed for life processes to occur within and between living cells. This is an important piece of the puzzle in determining where these constants come from and how they impact life as we know it.
	Researchers find 20,000-year-old refugium for orcas in the northern Pacific The northern Pacific near Japan and Russia is home for several different groups of orcas. They have no contact with each other, do not seek the same food, do not speak the same dialect, and do not mate with each other. How can this be when they live so close to each other and belong to the same species?
	Research group detects a quantum entanglement wave for the first time using real-space measurements Triplons are tricky little things. Experimentally, they're exceedingly difficult to observe. And even then, researchers usually conduct the tests on macroscopic materials, in which measurements are expressed as an average across the whole sample.
	Top science publisher withdraws flawed climate study Top science publisher Springer Nature said it has withdrawn a study that presented misleading conclusions on climate change impacts after an investigation prompted by an Agence France-Presse (AFP) inquiry.
	A giant black hole destroys a massive star Astronomers have made a thorough forensic study of a star that was torn apart when it ventured too close to a giant black hole and then had its insides tossed out into space.
	New ancient ape from Türkiye challenges the story of human origins A new fossil ape from an 8.7-million-year-old site in Türkiye is challenging long-accepted ideas of human origins and adding weight to the theory that the ancestors of African apes and humans evolved in Europe before migrating to Africa between nine and seven million years ago.
	Simulations suggest only 22 people are required to start a colony on Mars A team of computational social scientists at George Mason University has found via simulations that 22 people is the minimum number needed to start a human colony on Mars. The group has posted a paper describing their simulation on the arXiv preprint server.
	Population ecologist warns that humanity is on the verge of massive population correction Population ecologist William Rees, with the University of British Columbia's School of Community and Regional Planning, is reminding denizens of Earth that the planet can only support so many people. In his paper published in the journal World, he points out that many models have been developed over the years that show that only a certain number of animals (such as rats) can live in a given environment—they all show that at some point, a population correction occurs.
	Spanish astronomer discovers new active galaxy By analyzing the images of the Sombrero Galaxy obtained with the Hubble Space Telescope (HST), Elio Quiroga Rodriguez of the Mid Atlantic University in Spain, has identified a peculiar object, which turned out to be a galaxy hosting an active galactic nucleus (AGN). The finding was reported in a paper published August 11 on the pre-print server arXiv.
	Analyses of Pompeii victims with X-ray fluorescence suggests they died of asphyxiation A multi-institutional team of archaeologists, chemists and environmental scientists using portable X-ray fluorescence on victims of the Pompeii eruption in 79 AD finds that they likely died of asphyxiation. The group has published their results in PLOS ONE.
	Scientists release the first complete sequence of a human Y chromosome For decades, the Y chromosome—one of the two human sex chromosomes—has been notoriously challenging for the genomics community to sequence due to the complexity of its structure.
	How a lone 'immigrant' wolf revived a forest ecosystem In 1997, a lone wolf crossed an ice bridge that briefly connected Canada with the remote Isle Royale, which lies off the coast of Michigan in Lake Superior and is renowned for its rich biodiversity.