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כתבות אחרונות מאתר 'Phys'
Phys

Closing the carbon cycle: Unraveling the roles of light and heat in CO₂ photocatalysis‎

Rising carbon dioxide (CO2) emissions from human activities are the largest contributor to global warming. According to the International Energy Agency (IEA), global CO2 emissions reached an all-time high of 37.8 gigatons in 2024. While some of this CO2 is absorbed by soil, forests, and the oceans, a large fraction remains in the atmosphere, where it can persist for hundreds to thousands of years, leading to long-term impacts on the global climate.

00:03
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Phys

LiDAR maps medieval castle terrain and flags landslide-prone slopes in Japan‎

Researchers at University of Tsukuba have developed a method to differentiate the topography of medieval mountain castles from that of natural ridges using airborne light detection and ranging (LiDAR) data. This method is expected to be useful for detecting historically modified terrain, such as archaeological sites in mountainous regions, as well as for assessing the extent of topographic modifications and estimating the potential risk of landslides on modified slopes.

00:03
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Phys

eROSITA disentangles the solar system's X-ray glow from deep-space signals‎

Max Planck Institute for Extraterrestrial Physics scientists have been able to disentangle the X-ray glow originating in our solar system from similar emission reaching us from deep space, using data from the SRG/eROSITA space telescope. Four sky maps obtained between 2019 and 2021 from a vantage point approximately 1.5 million km from Earth—approximately four times the moon's distance—enabled the extraction of solar-wind charge exchange (SWCX) emission. The research is published in the journal Science.

23:51
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Phys

Wild Canadian freshwater fish reveal opioid and antidepressant buildup downstream‎

Fish living downstream of wastewater treatment plants are accumulating antidepressants, opioids and other drugs of abuse in their bodies, according to a new study. Using a new analytical method they developed, a team of researchers from the University of Waterloo discovered that several substances that affect the central nervous system, including fentanyl, methadone and venlafaxine, were detected in small fish living in rivers that receive urban wastewater.

23:41
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Phys

Sex pheromone of a sandgrain-sized insect deciphered‎

Parasitic wasps of the genus Trichogramma are among the smallest insects in the world—yet they play an important role in natural ecosystems and agricultural landscapes as natural antagonists of pest species. Research teams from the Universities of Regensburg, Wageningen and Groningen have now identified for the first time the sex pheromone of a Trichogramma wasp. The study shows that unimaginably small amounts of the female pheromone are sufficient to attract males and trigger their courtship behavior. The findings are published in the journal Scientific Reports.

23:41
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Phys

Industrial chemical leaks could push ozone layer recovery back by 7 years‎

The recovery of the ozone layer in Earth's stratosphere could be delayed by several years, according to an international study led by Swiss research institution Empa which included contributions from University of Bristol researchers. The cause is persistent emissions of so-called feedstock chemicals, which are still permitted as raw materials in industry. These ozone-depleting substances have so far been excluded from international agreements because, according to the current study, their emissions and use have been significantly underestimated.

23:25
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Phys

Washington DC's 240 million‑gallon sewage spill is a symptom of nationwide trouble‎

When 240 million gallons of raw sewage spilled into the Potomac River in Washington, D.C., starting in mid-January 2026 and running through mid-March, it was estimated to be the largest sewage spill in U.S. history. But it wasn't the first, nor will it be the last.

23:25
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Phys

Laser method unlocks 3,000-Kelvin thin-film synthesis for quantum materials‎

Thin films might not come up in conversation every day, but they are all around us. Take the metallic plastic films of chip bags, for example, or the anti-reflective coatings on eyeglasses. Even the coatings on pills that make them easier to swallow are thin films. Depositing extremely thin layers of materials in a consistent and uniform way is also crucial to the production of semiconductors, which are the foundation of modern electronics.

23:25
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Phys

Looking deep inside quarks: CMS test probes to 10⁻²⁰ meters and finds no inner structure‎

According to our current understanding of the universe, quarks are fundamental, point-like particles: basic building blocks that are not made up of smaller particles. A recent paper from the CMS Collaboration describes how it probed quarks to the scale of 10-20 meters to test this premise.

23:12
תפריט כתבה
Phys

Bird and tortoise fossil tracks on South Africa's coast: Latest findings are world firsts‎

The south coast of South Africa's Western Cape province is a rich source of fossil tracks and traces—clues suggesting what this environment may have been like many thousands of years ago.

23:04
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