ניווט נגישות
כתבות אחרונות מאתר 'Phys'
Phys

In ant nervous systems, gene expression may drive rescue behavior‎

Why do some ants help nestmates in distress while others don't? A research team from Johannes Gutenberg University Mainz (JGU) and Tel Aviv University addressed this question in a new study. The researchers examined worker ants of the species Cataglyphis niger, some of which had shown rescue behavior while others had not. The results, recently published in the Journal of Experimental Biology, suggest that the key difference lies not in body size, morphology or the animals' energy reserves, but in gene activity in the nervous system.

00:47
תפריט כתבה
Phys

Magic-angle graphene provides evidence for unconventional superconductivity‎

Researchers have completely suppressed superconductivity in magic-angle graphene by screening interactions between electrons, helping resolve a long-running debate about the origin of the phenomenon.

00:26
תפריט כתבה
Phys

New AI tool maps the hidden universe of small molecules‎

The human body and its gut microbiome produce thousands of small molecules that shape how the body functions—influencing immunity, metabolism and more. Identifying what those molecules actually are has been one of the biomedical sciences' most persistent bottlenecks. More than 80% of compounds detected in a typical biological sample cannot be matched to any known structure using current methods.

00:01
תפריט כתבה
Phys

Shoreline scavenger shows biological effects after eating plastic foam‎

In a paper published in the journal Marine Pollution Bulletin, researchers at Kyushu University report on what happens when wharf roaches, a common shoreline scavenger, eat expanded polystyrene (EPS). Roaches that fed on EPS showed no significant reduction in lifespan, but their guts displayed altered expression of genes involved in chemical defense, DNA repair and digestion. Analysis of the wharf roach gut microbiome showed little change, but several rare microbes were found only in the EPS-fed specimens.

23:55
תפריט כתבה
Phys

Do games make children more attentive or more distractible?‎

A study of preschool children found that brief digital or traditional gameplay improved performance on tasks requiring quick responses but reduced performance on tasks demanding greater concentration and self-control.

23:42
תפריט כתבה
Phys

Periodical cicadas may be doomed to extinction‎

Every 13 or 17 years, swarms of cicadas emerge from the ground, their black bodies, orange-tinged wings and ruby-red eyes enveloping trees and forests. It is a biological marvel unique in the insect world, and when it happens, it is impossible not to notice.

23:42
תפריט כתבה
Phys

AI helps reveal the immersive sensory experiences of ancient Etruscan tombs‎

The Etruscan painted tombs in Tarquinia, Italy, date to the first millennium BCE and are known for their vivid scenes of music, feasting, processions and the afterlife. While these tombs have been extensively studied, archaeologists have typically looked at the paintings as images to decode rather than as parts of an experience that people moved through.

23:22
תפריט כתבה
Phys

Before mixing starts, initial catalyst structure governs fuel-cell ink dispersion‎

Researchers from Kanazawa University, the University of Tokyo and HORIBA, Ltd. have shown that the initial state of platinum-on-carbon (Pt/C) catalyst particles before they are mixed with an ionomer strongly influences how a polymer electrolyte fuel cell (PEFC) catalyst ink subsequently develops. The paper is published in the Chemical Engineering Journal.

23:22
תפריט כתבה
Phys

Evidence-based approach shows de-escalation is a learnable police skill‎

A three-year research collaboration between Florida State University's College of Criminology and Criminal Justice and the Leon County Sheriff's Office (LCSO) has produced one of the most comprehensive real-world studies on police de-escalation to date.

23:03
תפריט כתבה
Phys

How Mercury formed its graphite crust and core‎

As the BepiColombo mission prepares to enter the final phase of its journey to Mercury, a series of studies conducted by researchers at the University of Liège and KU Leuven sheds new light on the early stages of the evolution of the planet closest to the sun. Using experimental petrology, the researchers are reconstructing in the laboratory the formation of Mercury's core, the crystallization of its magma ocean and the formation of its mantle. The studies are published in Earth and Planetary Science Letters, Nature Communications and Advances in Geochemistry and Cosmochemistry.

23:03
תפריט כתבה
דיווח על כתבה זו הסתרת כתבות מאתר זה המשך קריאה באתר המקור