SCIENCES ENERGIES ENVIRONNEMENT

 Newsletter Science X

 

Expéditeur :not-for-reply@physorg.com

À :olivier hartmanshenn

lun. 28 oct. à 04:34

Dear olivier hartmanshenn,

Here is your customized Science X Newsletter for week 43:

	Plastic chemical phthalate causes DNA breakage and chromosome defects in sex cells, new study finds A new study conducted on roundworms finds that a common plastic ingredient causes breaks in DNA strands, resulting in egg cells with the wrong number of chromosomes. Monica Colaiácovo of Harvard Medical School led the study, which was published October 24 in the journal PLOS Genetics.
	Millions in the US may rely on groundwater contaminated with PFAS for drinking water supplies Approximately 71 to 95 million people in the Lower 48 states—more than 20% of the country's population—may rely on groundwater that contains detectable concentrations of per- and polyfluoroalkyl substances, also known as PFAS, for their drinking water supplies. These findings are according to a U.S Geological Survey study published in the journal Science.
	How fast is quantum entanglement? Scientists investigate it at the attosecond scale Quantum theory describes events that take place on extremely short time scales. In the past, such events were regarded as 'momentary' or 'instantaneous': An electron orbits the nucleus of an atom—in the next moment it is suddenly ripped out by a flash of light. Two particles collide—in the next moment they are suddenly 'quantum entangled.'
	Natural compound found in flowers blocks activity of an enzyme involved in multiple sclerosis and cancer Scientists have identified a natural compound that halts the process involved in the progression of certain forms of cancer and demyelinating conditions—those that damage the sheath, known as myelin, that surrounds neurons—such as multiple sclerosis.
	Smallest dinosaur egg ever found confirmed in China A team of paleontologists, geoscientists and evolutionary specialists affiliated with multiple institutions in China has found that a fossilized egg unearthed in 2021 is the smallest dinosaur egg ever found. In their paper published in the journal Historical Biology, the group describes where the eggs were found, the techniques used to study them, and what the researchers learned about them.
	Researchers identify 'dancer' as a new curiosity style in Wikipedia browsing At one point or another, you may have gone online looking for a specific bit of information and found yourself "going down the Wiki rabbit hole" as you discover wholly new, ever-more fascinating related topics—some trivial, some relevant—and you may have gone so far down the hole it's difficult to piece together what brought you there to begin with.
	Burmese pythons can eat bigger prey than previously thought Burmese pythons can consume prey even larger than scientists realized, according to a new study published in the journal Reptiles & Amphibians.
	Graphene oxide and chitosan sponge found to be ten times more efficient at removing gold from e-waste A team of chemists and materials scientists at the National University of Singapore, working with colleagues from Manchester University, in the U.K., and Guangdong University of Technology, in China, has developed a type of sponge made of graphene oxide and chitosan, that can be used to extract gold from electronic waste.
	Future atmospheric rivers could bring catastrophic ocean level rise off the West Coast, simulation study shows A team of climate specialists from the NSF National Center for Atmospheric Research, Climate and Global Dynamics Lab, Texas A&M University, and Pennsylvania State University has found evidence for a rise in ocean levels during future atmospheric rivers (ARs) that form in the Pacific Ocean and make their way to the North American coast.
	Microbes in environment drove methane emissions more than fossil fuels between 2020 and 2022, analysis finds Microbes in the environment, not fossil fuels, have been driving the recent surge in methane emissions globally, according to a new, detailed analysis published Oct 28 in the Proceedings of the National Academy of Sciences by CU Boulder researchers and collaborators.
	Record gamma rays detected at Milky Way's core At the High-Altitude Water Cherenkov (HAWC) observatory, 13,000 feet above sea level on the Sierra Negra volcano of Mexico, researchers are getting a look into a violent mystery in the Milky Way galaxy. An international research team co-led by Los Alamos National Laboratory observed ultrahigh-energy gamma rays at more than 100 teraelectron volts, tracking their origin to the galactic center for the first time.
	Betelgeuse Betelgeuse? Bright star Betelgeuse likely has a 'Betelbuddy' stellar companion One of the brightest stars in the night sky, Betelgeuse, may not be on the brink of exploding as a supernova, according to a new study of the star's brightening and dimming. Instead, recent research shows that the observed pulsing of the starlight is probably caused by an unseen companion star orbiting Betelgeuse.
	Paleontologists discover Colorado 'swamp dweller' mammal that lived alongside dinosaurs A team of paleontologists working near Rangely, Colorado, has uncovered a new (or, more accurately, very old) state resident—a fossil mammal about the size of a muskrat that may have scurried through swamps during the Age of Dinosaurs.
	Rare fossils of extinct elephant document the earliest known instance of butchery in India During the late middle Pleistocene, between 300 and 400 thousand years ago, at least three ancient elephant relatives died near a river in the Kashmir Valley of South Asia. Not long after, they were covered in sediment and preserved along with 87 stone tools made by the ancestors of modern humans.
	Live imaging of ovulation in action reveals three distinct phases Researchers at the Max Planck Institute for Multidisciplinary Sciences have developed a live imaging method that reveals the process of ovulation in unprecedented detail. The team followed initial observations by performing inhibition testing to confirm causal effects.
	A cooling shift: Slowing ocean circulation may temper Arctic temperature rise The Arctic is warming at three to four times the global average. However, new research suggests the slowing of a key ocean current could reduce projected Arctic warming by up to 2 degrees Celsius by the end of the century.
	Where did kissing come from? Study introduces the 'groomer's final kiss hypothesis' A team at the University of Warwick is suggesting that human kissing evolved from grooming behaviors observed in ancestral great apes. In a study, "The Evolutionary Origin of Human Kissing," published in Evolutionary Anthropology, the researchers introduce the "groomer's final kiss hypothesis."
	Molecular study of newly discovered tardigrade species helps explain ability to withstand high doses of radiation A team of biologists affiliated with several institutions in China has learned more about the means by which tardigrades are able to withstand high doses of radiation. In their study, published in the journal Science, the group focused on a newly found species of the creature.
	Ion engines could take us to the solar gravitational lens in less than 13 years, suggests paper Sending an object to another star is still the stuff of science fiction. But some concrete missions could get us at least part way there. These "interstellar precursor missions" include a trip to the solar gravitational lens point at 550 AU from the sun—farther than any artificial object has ever been, including Voyager.
	Oriental hornets do not get sick or die when consuming very large amounts of alcohol, study shows A team of behavioral ecologists, zoologists and crop protection specialists from Tel Aviv University reports that Oriental hornets have the highest-known tolerance to alcohol in the animal kingdom. In their study published in Proceedings of the National Academy of Sciences, the group fed ethanol solutions to hornets.