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כתבות אחרונות מאתר 'Phys'
Phys

New model maps how social media users repeatedly spread misinformation‎

People who receive information on social media play a greater role in the spread of misinformation than research has acknowledged, according to research published in the International Journal of Enterprise Network Management. The researchers argue that efforts to tackle "fake news" should focus as much on why users share false information as on identifying those who create misleading content.

21:08
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Phys

Cameras attached to whale sharks capture krill chases never witnessed before‎

Whale sharks (Rhincodon typus)—the world's biggest fish—are one of the most charismatic marine species. They connect with the hearts of anyone lucky enough to encounter them, making people deeply curious about their lives and invested in their conservation.

21:08
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Phys

China evacuates 340,000 people as Typhoon Noul approaches‎

Authorities have evacuated more than 340,000 people and suspended work and rail services as Typhoon Noul approaches southern China, with flight cancellations announced in Hong Kong.

21:08
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Phys

Spain fights to 'save lives' as wildfire evacuees shelter in Madrid‎

Spain's Prime Minister Pedro Sánchez said Saturday firefighters were working to "save lives" in the blazes raging west of Madrid, as authorities said a separate fire in the east killed one person.

21:08
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Phys

SpaceX launches Starship on another test flight, this time with the most advanced Starlinks‎

SpaceX's mammoth Starship rocket blasted off Friday on another test flight stretching halfway around the world, this time releasing 20 of the most advanced Starlinks.

20:37
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Phys

The hunt for a natural molecule that can release cellular energy‎

All cells in the human body—and the motions they enable, from our beating hearts to our wiggling toes—use energy generated by a molecule called ATP. Its energy is thought to be released to fuel cellular processes in only one way: when ATP's decomposition is initiated by an enzyme, a specific type of protein.

19:06
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Phys

Ancient bones from smaller Maya communities reveal heavy reliance on maize and local subsistence patterns‎

Historians and archaeologists know that maize was a central food source and cultural symbol across the ancient Maya world, but much of what is known has come from studies focused on large Maya cities and elite burials.

18:35
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Phys

Herbivore species dynamics is key to grassland food web stability‎

Ecologists have long understood that biodiversity is paramount to ecosystem stability. Until now, however, most ecological research has focused on a single layer of ecological life at a time—for example, plant or animal communities. In reality, ecological systems have multiple layers that interact continuously. Plants are eaten by herbivores, herbivores are eaten by predators, and fluctuations at one trophic level, or an organism's specific position in the food chain, can ripple through the entire ecosystem.

18:05
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Phys

Rare blue optical transient points to possible new class of cosmic explosion‎

Chinese astronomers report the detection of a peculiar optical transient event that occurred in the center of a dwarf galaxy. The newly discovered event, designated AT2019ijn, is a fast-rising, slow-decaying blue optical transient with exceptionally bright radio emission. The finding was detailed in a paper published July 6 in The Astrophysical Journal Letters.

16:04
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Phys

Study explores rare atom-containing natural products and their biomedical potential‎

Modern research on secondary metabolites from microbes, plants and marine organisms has revealed a remarkable diversity of chemical structures and bioactivities with broad applications in biotechnology, agriculture and medicine. Most natural products are composed of primary biogenic elements such as carbon, hydrogen, nitrogen and oxygen.

15:03
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