Other Sciences News

Human Body’s Exposure to Ozone Generates Highly Reactive Hydroxyl Radicals, Study Shows

High concentrations of OH radicals were found when people were exposed to ozone in a climate-controlled chamber, and were a product of a reaction with the skin-oil squalene. Image credit: Richard Duijnstee.
Sep 2, 2022 by News Staff

Hydroxyl radicals are highly reactive chemical species that attack most of the organic molecules. High concentrations of OH radicals were found when people were exposed to ozone in a climate-controlled chamber, and were a product of a reaction with the skin-oil squalene. Image credit: Richard Duijnstee. The vast majority of humans spend most of their time indoors and are exposed to a number of chemicals from various sources, including outdoor pollutants...

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A dog with the PetTrack device. Image credit: Georgia Tech.

PetTrack: New Device Tracks Pet Location and Activity Indoors

Sep 1, 2022 by News Staff

Tracking a pet’s location and activity indoors is of interest to pet owners who want to feel connected to their pet as well as of interest to pet owners...

van der Meulen et al. show that both systemic and inhaled glucocorticoid use are associated with an apparently widespread reduction in white matter integrity, which may in part underly the neuropsychiatric side effects observed in patients using glucocorticoids. Image credit: Steve Buissinne.

Glucocorticoid Use Associated with Structural and Volume Changes in White and Gray Matter

Sep 1, 2022 by News Staff

New research from the Leiden University Medical Center shows that both systemic and inhaled glucocorticoids — a class of synthetic steroids —...

Schematic model of fluvial systems both before and after the development of land plants: before the Devonian period, minimal land plants, rapid channel migration and river systems dominated by braided rivers led to rapid sediment transfer, minimal development of mud-sized particles and minor deposition of mudrocks along continental margins; in contrast, after the Devonian, the expansion of vascular land plants led to the development of meandering rivers and the dramatic slowing of sediment transfer to marine environments; the red dashed line represents a generalized sediment transport path that is more sinuous post-Devonian and less sinuous pre-Devonian; these diametric depositional systems influenced the isotopic composition of sediment available for reworking and melting in magmatic systems along destructive plate boundaries. Image credit: Spencer et al., doi: 10.1038/s41561-022-00995-2.

Emergence of Land Plants Altered Composition of Earth’s Continental Crust, Researchers Say

Aug 31, 2022 by News Staff

The evolution of land plants took place about 430 million years ago (Silurian period), when North America and Europe were conjoined in a landmass called...

Yang et al. provide new insights into the mechanisms by which blue light interferes with vital metabolic pathways that are conserved between fly and human cells. Image credit: Pexels.

Excessive Blue Light Leads to Accelerated Aging in Fruit Flies, Research Finds

Aug 31, 2022 by News Staff

Blue light is becoming increasingly prevalent in artificial illumination, raising concerns about its potential health hazard to humans. In a new study,...

The iron-carbon alloy reacted with water at high pressure and high temperature conditions related to the Earth’s deep mantle in a diamond-anvil cell. Image credit: Ko et al., doi: 10.1029/2022GL098271.

‘Diamond Factory’ May Have Existed in Earth’s Interior for Billions of Years: Study

Aug 31, 2022 by News Staff

Carbon plays a vital role in geological processes occurring in the Earth’s interior. While most carbon on our planet exists in its core, whether or not...

Kawano et al. show that intestinal microbiota protects against development of obesity, metabolic syndrome, and pre-diabetic phenotypes by inducing commensal-specific Th17 cells. Image credit: Kawano et al., doi: 10.1016/j.cell.2022.08.005.

Dietary Sugar Disrupts Gut Microbiome, Says New Study

Aug 31, 2022 by News Staff

Dietary sugar alters the gut microbiome, setting off a chain of events that leads to metabolic disease, pre-diabetes, and weight gain, according to a new...

Drinking tea may be associated with a moderately lower mortality risk. Image credit: Sci.News.

Tea, Even at Higher Levels of Intake, Can Be Part of Healthy Diet, New Study Suggests

Aug 30, 2022 by Sergio Prostak

In a new prospective cohort study, higher tea intake was associated with lower mortality risk among those drinking two or more cups per day, regardless...

Characterization of human accumbens electrophysiological signal provoked by exposure to preferred food stimuli: (a) schematic of the multi-stage, staggered enrollment, early feasibility study design; the current stage of each participant within the trial is highlighted (blue - subject 1; green - subject 2); (b) two quadripolar depth electrodes placed bilaterally in the nucleus accumbens; (c) the multi-item buffet of preferred foods allowing us to examine nucleus accumbens electrophysiology during LOC eating as well as the preceding in-lab standardized meals. Image credit: Shivacharan et al., doi: 10.1038/s41591-022-01941-w.

Deep Brain Stimulation May Help Treat Binge-Eating Disorder

Aug 30, 2022 by News Staff

In a pilot study led by Pennsylvania Hospital and the Stanford University School of Medicine, deep brain stimulation — guided by patterns of neural...

Dhoundiyal et al. discovered that neurons have an emergency back-up system to enable them to remain functional even when their energy supply is disrupted. Image credit: Colin Behrens.

Neurons Have Emergency Back-Up System, Neuroscientists Say

Aug 29, 2022 by News Staff

The newly-discovered neuronal back-up system safeguards metabolic flexibility of neurons to cope with energy demands of electrical signaling, according...

Yuta Senzai & Massimo Scanziani discovered that the direction and amplitude of rapid eye movements during REM sleep reveal the direction and amplitude of the ongoing changes in virtual head direction. Image credit: Yuta Senzai & Massimo Scanziani, doi: 10.1126/science.abp8852.

Study: Rapid Eye Movements during REM Sleep Mimic Gazes in Dream World

Aug 26, 2022 by News Staff

Sleep includes phases characterized by rapid eye movement (REM) that were known to be associated with dreaming. But are these eye movements related to...

Representation of the modes of locomotion practiced by Sahelanthropus tchadensis. Image credit: Sabine Riffaut, Guillaume Daver, Franck Guy / PALEVOPRIM / CNRS / University of Poitiers.

Hominins Were Already Bipedal 7 Million Years Ago, Researchers Say

Aug 25, 2022 by Enrico de Lazaro

Paleoanthropologists have examined three fossilized limb bones of Sahelanthropus tchadensis, one of the oldest known species in the human family tree. Representation...

Inadequate sleep represents a significant influential force determining whether humans choose to help one another, observable across micro- and macroscopic levels of civilized interaction. Image credit: Sasin Tipchai.

Inadequate Sleep Makes Us Less Generous, New Study Shows

Aug 25, 2022 by News Staff

New research by University of California, Berkeley scientists shows that a lack of sleep impairs our basic social conscience, making us withdraw our desire...

(A) the Milky Way Galaxy with superimposed spiral arms and geological events: the arm and the Solar System rotate clockwise at different rates; the ‘+’ number denotes the number of times Earth has passed through that arm; (B) model of the Oort cloud showing cometary nuclei; (C) schematic reconstruction of early Earth impact process; (D) early crustal nuclei development. Image credit: NASA / JPL-Caltech / ESO / R. Hurt / Kirkland et al., doi: 10.1130/G50513.1.

Transits through Milky Way’s Spiral Arms Helped Form Early Earth’s Continental Crust, Study Says

Aug 24, 2022 by News Staff

New research led by Curtin University geologists suggests that regions of space with dense interstellar clouds may send more high-energy comets crashing...

Denisovans were probably dark-skinned, unlike the pale Neandertals. The picture shows a Neanderthal man. Image credit: Mauro Cutrona.

Study: Much of Neanderthal-Modern Human Interbreeding Took Place in Near East

Aug 24, 2022 by News Staff

Studies of human fossils, and the DNA extracted from them, reveal a complex history of interbreeding between various human lineages over the past 100,000...

Consumption of non-nutritive sweeteners may induce person-specific, microbiome-dependent glycemic alterations, necessitating future assessment of clinical implications. Image credit: Suez et al., doi: 10.1016/j.cell.2022.07.016.

Some Artificial Sweeteners Can Alter Gut Microbiome, New Study Says

Aug 22, 2022 by News Staff

Non-nutritive sweeteners are commonly integrated into human diet and presumed to be inert. However, previous studies suggest that they may impact the microbiome...

Characterization of the liquid-liquid phase transition in colloidal (top) and molecular water (bottom) by identifying links and knots. LDL - low-density liquid; HDL - high-density liquid. Image credit: Neophytou et al., doi: 10.1038/s41567-022-01698-6.

New Research Sheds More Light on Liquid-Liquid Phase Transition in Deeply Supercooled Water

Aug 22, 2022 by News Staff

The new evidence represents a significant step forward in confirming the idea of a liquid-liquid phase transition first proposed in 1992. Characterization...

Top: map of South Africa with the location of Ga-Mohana Hill (GHN); inset map shows the approximate extent of the Kalahari Basin in southern Africa and the location of the region of interest in relation to it. Bottom: representative photographs of each of the tufa morphologies identified on the Ga-Mohana hillside. Image credit: von der Meden et al., doi: 10.1371/journal.pone.0270104.

Ancient Humans Lived in Kalahari Desert More Than 20,000 Years Ago

Aug 18, 2022 by News Staff

Detailed, well-dated palaeoclimate and archaeological records are critical for understanding the impact of environmental change on human evolution. In...

Ultrasound exposure improved depressive-like behavior in olfactory bulbectomized rats and reduced their plasma corticosterone levels. Image credit: Mary Theresa McLean.

Ultrasound Exposure Improves Depressive-Like Behavior in Rats, New Study Shows

Aug 16, 2022 by Enrico de Lazaro

Scientists from the Tokyo University of Science and FUJIMIC, Inc. have investigated the effects of ultrasound exposure in olfactory bulbectomized rats...

The larynx is an organ in the top of the neck involved in breathing, producing sound and protecting the trachea against food aspiration. Image credit: OpenStax College / CC BY 3.0.

Simplified Voice Box Enabled Complex Humans Speech, New Research Suggests

Aug 12, 2022 by News Staff

Human speech and language are highly complex, consisting of a large number of sounds. The human larynx (voice box) has acquired the capability to create...

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