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À :olivier hartmanshenn

lun. 10 mars à 04:34

Dear olivier hartmanshenn,

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Here is your customized Science X Newsletter for week 10:

	Naturally occurring molecule rivals Ozempic in weight loss, sidesteps side effects A naturally occurring molecule identified by Stanford Medicine researchers appears similar to semaglutide—also known as Ozempic—in suppressing appetite and reducing body weight. Notably, testing in animals also showed that it worked without some of the drug's side effects, such as nausea, constipation and significant loss of muscle mass.
	Compound mimics cannabis for pain relief without the side effects: Mouse study points to effective opioid alternative Treatment for chronic pain still relies heavily on opioids. While effective, they are highly addictive and potentially deadly if misused.
	After 120 years of conservation efforts, Yellowstone bison are a single breeding population, researchers discover Researchers from the Texas A&M College of Veterinary Medicine and Biomedical Sciences (VMBS) have discovered that bison in Yellowstone National Park—the only group of American bison that has continually existed as wildlife in the United States—now consist of a single large, interbreeding population derived from multiple historic bison herds.
	Gravity from entropy: A radical new approach to unifying quantum mechanics and general relativity In a new study published in Physical Review D, Professor Ginestra Bianconi, Professor of Applied Mathematics at Queen Mary University of London, proposes a new framework that could revolutionize our understanding of gravity and its relationship with quantum mechanics.
	Superconducting quantum processor prototype operates 10¹⁵ times faster than fastest supercomputer Zuchongzhi-3, a superconducting quantum computing prototype with 105 qubits and 182 couplers, has made significant advancements in random quantum circuit sampling. This prototype was successfully developed by a research team from the University of Science and Technology of China (USTC).
	Laser light made into a supersolid for the first time A small international team of nanotechnologists, engineers and physicists has developed a way to force laser light into becoming a supersolid. Their paper is published in the journal Nature. The editors at Nature have published a Research Briefing in the same issue summarizing the work.
	Scientists observe that smartphone restriction for three days can alter brain activity A smartphone's glow is often the first and last thing we see as we wake up in the morning and go to sleep at the end of the day. It is increasingly becoming an extension of our body that we struggle to part with. In a recent study in Computers in Human Behavior, scientists observed that staying away from smartphones can even change one's brain chemistry.
	A chemical 'trojan horse': Polymers used in everyday products can degrade into toxic chemicals, study finds The scientific community has long believed that polymers—very large molecules—are too big to migrate out of products into people and therefore pose no health risks. As a result, polymers have largely evaded regulation. For example, polymers are exempt from the major toxics acts: Toxic Substances Control Act in the U.S. and REACH in the E.U. However, a study published today in Nature Sustainability demonstrates that polymers used as flame retardants can break down into smaller harmful chemicals.
	New fossil discovery of an early human relative reveals that it walked upright, just like humans Paranthropus robustus was a species of prehistoric human that lived in South Africa about 2 million years ago, alongside Homo ergaster, a direct ancestor of modern people. Fossils of Paranthropus robustus are found in abundance at Swartkrans Cave, situated about halfway between Johannesburg and Pretoria. Much has been revealed about the diet and social organization of this extinct species based on studies of its many skulls and hundreds of teeth, which have been recovered from Swartkrans since scientific excavations began there in 1948.
	Einstein's light quanta through the lens of Maxwell's equations Light was long considered to be a wave, exhibiting the phenomenon of interference in which ripples like those in water waves are generated under specific interactions. Light also bends around corners, resulting in fringing effects, which is termed diffraction. The energy of light is associated with its intensity and is proportional to the square of the amplitude of the electric field, but in the photoelectric effect, the energy of emitted electrons is found to be proportional to the frequency of radiation.
	Melting Antarctic ice sheets are slowing Earth's strongest ocean current, research reveals Melting ice sheets are slowing the Antarctic Circumpolar Current (ACC), the world's strongest ocean current, researchers have found. This melting has implications for global climate indicators, including sea level rise, ocean warming and viability of marine ecosystems.
	How a turf war between lizards in Florida impacts mosquitoes and maybe human health Mosquitoes might be the bane of a summer barbecue in Kendall or a stroll on Miami Beach, but researchers in Florida are now also looking at the insects' more obscure targets—and how even a tiny, orange-flapped lizard could play a role in protecting our health.
	US military's mini space shuttle X-37B returns to Earth after orbiting for 434 days on a secret mission The U.S. military's classified mini space shuttle returned to Earth on Friday after circling the world for 434 days.
	Space capsule entering Earth's atmosphere detected with distributed acoustic sensing On December 3, 2018, NASA's Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) successfully rendezvoused with the near-earth asteroid (NEA) 101955 Bennu. Over the next two years, the mission collected rock and regolith samples from the asteroid's surface. By September 24, 2023, the mission's sample return capsule (SRC) entered Earth's atmosphere and was collected by NASA scientists. Analysis of these samples is already providing insight into what conditions were like during the early solar system.
	Hurricanes shifting south of North Atlantic: Study warns of growing risks for coastal regions A new study led by Dr. Cao Xi, Associate Professor at the Institute of Atmospheric Physics, Chinese Academy of Sciences, has uncovered a significant southward shift in the formation of hurricanes over the North Atlantic Ocean. This shift, observed since 1979, is linked to changes in wind patterns and warming trends, raising concerns about increased disaster risks for low-latitude island nations and North American coastal areas. The research is published in the journal npj Climate and Atmospheric Science.
	AI models make precise copies of cuneiform characters Deciphering some people's writing can be a major challenge—especially when that writing is cuneiform characters imprinted onto 3,000-year-old tablets.
	Water might be older than we first thought, forming a key constituent of the first galaxies Water may have first formed 100–200 million years after the Big Bang, according to a modeling paper published in Nature Astronomy. The authors suggest that the formation of water may have occurred in the universe earlier than previously thought and may have been a key constituent of the first galaxies.
	UK's Royal Society of top scientists mulls call to oust Elon Musk Britain's Royal Society will hold a crunch meeting on Monday following calls to expel technology billionaire Elon Musk, the world's richest man, from the prestigious institute of scientists.
	Unburied treasure: Rover researchers find unexpected minerals on Mars that hint at possibility of ancient life Sometimes scientists must dig and work and sweat to make scientific discoveries. And sometimes a robot rolls over a rock that turns out to be a revelation.
	Distinguishing classical from quantum gravity through measurable stochastic fluctuations In a new Physical Review Letters study, researchers propose an experimental approach that could finally determine whether gravity is fundamentally classical or quantum in nature.