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כתבות אחרונות מאתר 'Phys'
Phys

Why has Britain's grass turned yellow? A plant scientist explains what happens next‎

Fields, parks and lawns across Europe have turned to straw this summer. Landscapes thousands of years old have been revealed as green outlines against yellow backgrounds, where ancient underground walls and ditches retain enough water to sustain pockets of grass above them. Lawns and parklands have been especially affected because what water is available is being directed to homes and farms.

03:52
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Phys

Teens are turning to AI chatbots for emotional support—here's how to keep kids safe‎

It's 2 a.m., and a teenage girl, worrying about an issue with a friend, lies awake. Rather than wake her parents, she picks up her phone, opens an AI app and types, "I'm so stressed out, I can't sleep."

02:54
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Phys

Two oceans, one country—and 20 times more sharks in the prehistoric Pacific‎

How many sharks should a coral reef have? It sounds like a simple question, but almost nowhere on Earth is there a reef that has not at some time been fished or otherwise affected by humans, so there is no yardstick against which to measure what has been lost or what recovery would look like.

02:54
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Phys

Layered nano-biohybrid uses sunlight, air and water to make hydrogen peroxide‎

A research team led by the U.S. Department of Energy's (DOE) Argonne National Laboratory has developed a new material that combines inorganic material with biological components to produce hydrogen peroxide more efficiently.

02:26
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Phys

Fulfilling friendships linked to better health and well-being across 22 countries‎

Fulfilling friendships and close social relationships are strongly linked to excellent physical and mental health, finds a substantial global study published in the Journal of Mental Health.

02:13
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Phys

Tracer exchange reveals ions can speed up or slow down inside battery solids‎

Understanding how ions diffuse in solid materials is essential for technologies including batteries, electronics and chemical catalysts, but it has been hard for a simple reason: the materials are solids.

01:50
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Phys

Theoretical framework expands directional light control beyond ordered crystal structures‎

A research team has developed a new theoretical framework that can suppress light scattering in certain directions while enhancing it in others, even in irregularly arranged materials. The work extends research on controlling light scattering, which has traditionally centered on ordered crystal structures, into the realm of disordered systems.

01:24
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Phys

Synchronized star pairs unleash radio bursts via a Jupiter-Io-like mechanism‎

Researchers have helped unravel the mystery of why certain pairs of stars pulse with regular, long-period bursts of radio waves. The particular class of objects observed comes in pairs that always include a compact dead star, called a white dwarf, locked in orbit with an M dwarf, a red star smaller than our sun.

01:03
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Phys

Butterfly effects of climate change‎

The Australian National Insect Collection at CSIRO holds 2,000 drawers of butterfly specimens, including some that were collected more than a century ago.

01:03
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Phys

Mutation hotspots help 'friendly' viruses outmaneuver the bacteria in your gut‎

Every 15 minutes, someone in the U.S. dies from a drug-resistant superbug. A few decades from now, antibiotic-resistant bacterial infections threaten to become the leading cause of death worldwide, outpacing cancer.

00:51
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