REPRIOSE DES PARUTIONS
lun. 15 juil. à 05:35Dear olivier hartmanshenn,
Here is your customized Science X Newsletter for week 28:
Astronomers find surprising ice world in the habitable zone with JWST data
A team of astronomers has identified a temperate exoplanet as a promising super-Earth ice or water world.
Study reveals environmental impact of artificial sweeteners
The human body's inability to break down sucralose, an artificial sweetener found in many zero-calorie food and drink products, is well established by scientific research. The compound is so stable that it escapes wastewater treatment processing and is in drinking water and aquatic environments.
Brain size riddle solved as humans exceed evolutionary trend
The largest animals do not have proportionally bigger brains—with humans bucking this trend—a study published in Nature Ecology & Evolution has revealed.
'A history of contact': Geneticists are rewriting the narrative of Neanderthals and other ancient humans
Ever since the first Neanderthal bones were discovered in 1856, people have wondered about these ancient hominins. How are they different from us? How much are they like us? Did our ancestors get along with them? Fight them? Love them? The recent discovery of a group called Denisovans, a Neanderthal-like group who populated Asia and South Asia, added its own set of questions.
New geological dating techniques place first European hominids in Iberian Peninsula 1.3 million years ago
One of the most important controversies about human evolution and expansion is when and by what route the first hominids arrived in Europe from the African continent. Now, geological dating techniques at the Orce sites (Baza basin, Granada) place the human remains found in this area as the oldest in Europe, at approximately 1.3 million years old. These results reinforce the hypothesis that humans arrived in Europe through the south of the Iberian Peninsula, through the Strait of Gibraltar, instead of returning to the Mediterranean via the Asian route.
Physicists suggest tachyons can be reconciled with the special theory of relativity
Tachyons are hypothetical particles that travel at speeds greater than the speed of light. These superluminal particles, are the "enfant terrible" of modern physics. Until recently, they were generally regarded as entities that did not fit into the special theory of relativity.
New incompletely rifted microcontinent identified between Greenland and Canada
Plate tectonics are the driving force behind Earth's continental configurations, with the lithosphere (oceanic and continental crusts and upper mantle) moving due to convection processes occurring in the softer underlying asthenospheric mantle. Many earthquakes, volcanic eruptions and mountain formations are direct consequences of the movements of these globe-spanning plates, particularly at their margins.
Researchers discover a new form of scientific fraud: Uncovering 'sneaked references'
A researcher working alone—apart from the world and the rest of the wider scientific community—is a classic yet misguided image. Research is, in reality, built on continuous exchange within the scientific community: First you understand the work of others, and then you share your findings.
Astronomers suggest up to 60% of near-Earth objects could be dark comets
Up to 60% of near-Earth objects could be dark comets, mysterious asteroids that orbit the sun in our solar system that likely contain or previously contained ice and could have been one route for delivering water to Earth, according to a University of Michigan study.
Lithium ion batteries a growing source of PFAS pollution, study finds
Texas Tech University's Jennifer Guelfo was part of a research team that found the use of a novel sub-class of per- and polyfluoroalkyl (PFAS) in lithium ion batteries is a growing source of pollution in air and water.
First local extinction due to sea level rise identified in the US
The United States has lost its only stand of the massive Key Largo tree cactus in what researchers believe is the first local extinction of a species caused by sea level rise in the country.
An electric passenger light rail for Okanagan Valley, Canada
Anyone who has ever been stuck in gridlock while driving over Kelowna's William R. Bennett Bridge or any Okanagan community can appreciate the thought that there has to be a better alternative than Highway 97 to navigate the busy corridor.
Auroras caused by head-on blows to Earth's magnetic field could damage critical infrastructure, scientists say
Auroras have inspired myths and portents for millennia—but only now, with modern technology dependent on electricity, are we appreciating their true power. The same forces which cause auroras also cause currents that can damage infrastructure which conducts electricity, like pipelines.
New shapes of photons open doors to advanced optical technologies
Researchers from the University of Twente in the Netherlands have gained important insights into photons, the elementary particles that make up light. They 'behave' in an amazingly greater variety than electrons surrounding atoms, while also being much easier to control.
Evidence of water vapor detected in the atmosphere of Smertrios
Using the CARMENES spectrograph, astronomers have found evidence of water vapor in the atmosphere of a hot Saturn exoplanet designated HD 149026 b, dubbed Smertrios. The finding, reported in a research paper published on the preprint server arXiv, could be key to a better understanding of the structure and formation scenario of this alien world.
Theoretical physicists find Higgs boson does not seem to contain any harbingers of new physics
The Higgs boson was discovered in the detectors of the Large Hadron Collider a dozen or so years ago. It has proved to be a particle so difficult to produce and observe that, despite the passage of time, its properties are still not known with satisfactory accuracy. Now we know a little more about its origin, thanks to the just-published achievement of an international group of theoretical physicists with the participation of the Institute of Nuclear Physics of the Polish Academy of Sciences.
New study finds 40% of cancer cases and almost half of all deaths in the US linked to modifiable risk factors
A study led by researchers at the American Cancer Society (ACS) finds four in 10 cancer cases and about one-half of all cancer deaths in adults 30 years old and older in the United States (or 713,340 cancer cases and 262,120 cancer deaths in 2019) could be attributed to modifiable risk factors, including cigarette smoking, excess body weight, alcohol consumption, physical inactivity, diet, and infections.
Researchers realize time reversal through input-output indefiniteness
A research team has constructed a coherent superposition of quantum evolution with two opposite directions in a photonic system and confirmed its advantage in characterizing input-output indefiniteness. The study was published in Physical Review Letters.
Photons from quantum dot emitters violate Bell inequality in new study
A new study in Nature Physics demonstrates a novel method for generating quantum entanglement using a quantum dot, which violates the Bell inequality. This method uses ultra-low power levels and could pave the way for scalable and efficient quantum technologies.
Introducing co-cultures: When co-habiting animal species share culture
Cooperative hunting, resource sharing, and using the same signals to communicate the same information—these are all examples of cultural sharing that have been observed between distinct animal species. In an opinion piece published June 19 in the journal Trends in Ecology & Evolution, researchers introduce the term "co-culture" to describe cultural sharing between animal species. These relationships are mutual and go beyond one species watching and mimicking another species' behavior—in co-cultures, both species influence each other in substantial ways.
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