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| Tug of sun, moon could be driving plate motions on ‘imbalanced’ Earth Posted: 21 Jan 2022 01:55 PM PST A study proposes that imbalanced forces and torques in the Earth-moon-sun system drive circulation of the whole mantle. The new analysis provides an alternative to the hypothesis that the movement of tectonic plates is related to convection currents in the Earth's mantle. |
| River flows linked to the ups and downs of imperiled Chinook salmon population Posted: 21 Jan 2022 11:54 AM PST A study has discovered that sufficient water flows during summer can be critical to a Chinook salmon population in the interior of British Columbia. |
| Rusting iron can be its own worst enemy Posted: 21 Jan 2022 11:54 AM PST Atom-level simulations reveal the reason iron rusts in supposedly 'inert' supercritical carbon dioxide fluid. Trace amounts of water can cause a reaction at the interface between iron and the fluid, prompting the formation of corrosive chemicals. |
| Mange outbreak decimated a wild vicuna population in Argentina Posted: 21 Jan 2022 11:54 AM PST Mange has decimated the population of wild vicunas and guanacos in an Argentinian national park that was created to conserve them, according to a new study. The findings suggest domestic llamas introduced to the site may have been the source of the outbreak. Cascading consequences for local predator and scavenger species are expected. |
| Posted: 21 Jan 2022 09:48 AM PST In a win-win for commercial fisheries and marine wildlife, researchers have found that using lighted nets greatly reduced accidental bycatch of sharks, rays, sea turtles, and unwanted finfish. |
| Posted: 21 Jan 2022 09:48 AM PST Vortex dynamics simulations reveal reconnection, an important property linked with creation of turbulence cascade, fluid mixing, and aerodynamic noise generation. Turbulent pipe flow simulated at high Reynolds number of up to 5,000. |
| Late-life exercise shows rejuvenating effects on cellular level Posted: 21 Jan 2022 09:48 AM PST When 2-year old mice were studied after two months of progressive weighted wheel running, despite having no prior training, it was determined that they were the epigenetic age of mice eight weeks younger than sedentary mice of the same age. |
| Sex-typical behavior of male, female mice guided by differences in brain’s gene activity Posted: 21 Jan 2022 09:44 AM PST Scientists found more than 1,000 gene-activation differences between female and male mice's brains, plus more than 600 between females in different stages of their reproductive cycle. |
| New MRI expands access to life-saving imaging Posted: 20 Jan 2022 01:51 PM PST MRI is a powerful medical tool that provides detailed images of everything from bones and joints to the brain and spinal cord, but millions of patients can't benefit from the improved care it provides. Implanted devices like defibrillators and pacemakers interfere with the MRI's magnetic signal, while obese and claustrophobic patients are often unable to get into the small opening on a traditional MRI machine. |
| Pristine groundwater seeps support native algae on Hawai‘i’s coasts Posted: 20 Jan 2022 01:51 PM PST Native marine macroalgae, also known as limu, or as seaweed, thrive in environments created by natural groundwater seeps, specifically benefiting from the combined effects of enhanced nutrients despite lowered salinity levels, according to a new review. |
| Poor fidelity may mean effective education strategies never see light of day Posted: 20 Jan 2022 01:50 PM PST Promising new education interventions are potentially being 'unnecessarily scrapped' because trials to test their effectiveness are insufficiently faithful to the original research, a study warns. Researchers ran a large-scale computer simulation to examine how much 'fidelity' compromises the results of school-based trials of new learning innovations and strategies. 'Fidelity' is the extent to which these evaluations adhere to the original research on which the educational intervention is based. |
| Quantum dots boost perovskite solar cell efficiency and scalability Posted: 20 Jan 2022 11:07 AM PST Scientists have boosted the efficiency and scalability of perovskite solar cells by replacing their electron-transport layers with a thin layer of quantum dots. |
| Undescended testis: Fate of fertility predicted by blood biomarkers Posted: 20 Jan 2022 11:07 AM PST In boys with undescended testis, the risk of developing infertility is traditionally predicted based on a decrease in germ cell count observed using testicular biopsy samples. However, the process of testicular biopsy carries the risk of injury, infection, and developing subfertility. In a new study, researchers from Japan have identified an alternative means of predicting future infertility based on serum sex hormone ratios without performing the testicular biopsy. |
| Towards quantum simulation of false vacuum decay Posted: 20 Jan 2022 09:53 AM PST By shaking an optical lattice potential, researchers have realized a discontinuous phase transition in a strongly correlated quantum gas, opening the door to quantum simulations of false vacuum decay in the early universe. |
| Stirring a superfluid with a laser Posted: 20 Jan 2022 07:34 AM PST Researchers used optical trapping for the first time inside an ultracold superfluid made of helium. They were able to trap and monitor nanoparticles optically at ultralow temperatures. This technique may assist in future experiments in the field of quantum hydrodynamics. |
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