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כתבות אחרונות מאתר 'Phys'
Phys

Earth shifted among five 'mega-climate' states over 539 million years, with extinctions spiking near transitions‎

Earth's climate has undergone dramatic changes throughout its history, but new research suggests those changes may not have been as random as previously thought. A study led by an international team of researchers, including University of New Mexico paleobiologist Corinne "Cori" Myers, found that Earth's climate over the past 539 million years tended to remain within a small number of recurring climate states. The research also found that periods of elevated extinction, including the five major mass extinction events in Earth's history, frequently occurred as the planet transitioned between those states.

22:05
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Phys

NASA's Hubble seeks lensed supernova, marks 200,000 orbits‎

NASA's Hubble Space Telescope completed its 200,000th orbit around Earth on Sept. 19, marking another milestone for an observatory that continues to transform our understanding of the universe.

22:05
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Phys

Making sense of shallow-water waves with advanced statistics‎

When ocean waves reach shallow water, their complex interactions can produce lower-frequency infragravity waves. These waves strongly affect—and are affected by—the shape of coastlines, linking them to erosion, sediment deposition and the degradation of coastal ice.

21:44
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Phys

Natural compound from soil bacteria offers new approach to treating drug-resistant tuberculosis‎

According to the World Health Organization (WHO), more than 10 million people contract tuberculosis (TB) each year. It is one of the deadliest infectious diseases worldwide. Treatment is lengthy and typically involves a combination of several antibiotics over many months. Drug-resistant strains are particularly problematic because the antibiotics used against them are only partially effective. New compounds capable of overcoming existing resistance are urgently needed.

21:44
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Phys

It's the small things: Treating something as even slightly significant affects motivation‎

When Fan Yang's children came home complaining about a crafting class, they had a particularly strong advocate.

21:21
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Phys

Soil heterogeneity helps bacteria find nutrients‎

Microorganisms regulate key processes in soils and aquifers, including nutrient cycling, carbon turnover and contaminant degradation. Many bacteria use chemotaxis, the ability to sense and swim toward chemical signals, to locate nutrient-rich hotspots. However, natural subsurface environments are highly heterogeneous, containing complex pore networks that create strong variations in fluid flow and nutrient availability. How these physical conditions influence bacterial foraging has remained poorly understood.

21:21
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Phys

Reinvestigation of 6,800-year-old site in Serbia reveals larger settlement and egalitarian social structure‎

Southeastern Europe and the Balkans are a key region for understanding the European Neolithic. Many ways of life and economic systems that continue to shape our lives today first emerged there in Europe and later spread across the continent. An archaeological culture named after the Vinča site in present-day Serbia marks a late phase of the Neolithic period in the region. More than 6,500 years ago, people there lived in large settlements for extended periods for the first time. They maintained extensive trade networks. Pottery and stonework demonstrate extensive knowledge of materials and a wide range of decorative styles.

21:21
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Phys

Workers with psychological capital are better prepared to weather increasing work stress‎

Workers in the U.S. are feeling the strain of stress and economic uncertainty, and nearly two in five U.S. workers (37%) believe their work environment has a negative impact on their mental health—up from 32% last year, according to the American Psychological Association's 2026 Work in America survey.

21:03
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Phys

Uncovering gravity's impact on the human genome‎

The Human Genome Project was launched in 1990, preceded by decades of breakthroughs in genetics. It eventually gave us a sequence of the human genome. Yet, while the physical rules behind the genome's organization remain an active area of research, many questions are still largely unanswered. Among these is the impact of an omnipresent force influencing life on Earth: gravity.

21:03
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Phys

The far side of the moon provides clues to a past magnetic field‎

Unlike Earth, the moon no longer has a core-generated magnetic field. On our planet, the movement of liquid iron in the outer core generates a global magnetic field. This so-called geodynamo works on a similar principle to a bicycle dynamo, which converts mechanical motion into electrical energy. "Today, there is an ongoing heated debate as to whether the moon also operated a dynamo in the past," says Xi Yang, a Ph.D. student in the Department of Earth and Planetary Sciences at ETH Zurich. This is because analyses of rock samples brought back to Earth by the Apollo astronauts are contradictory.

21:03
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