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כתבות אחרונות מאתר 'Phys'
Phys

Frozen Greenland middens preserve 4,500 years of farms, seal hunts and toilets‎

Greenland has a long and checkered history of human settlement: several Paleo-Inuit cultures since approximately 2,500 BCE, descendants of Vikings between the 10th and 15th centuries, and early modern Danes since 1721. All left their traces on the landscape, for example in the form of ancient domestic rubbish heaps. Composed of waste like animal bones, excrement, mollusk shells and human artifacts, these middens are a precious resource for archaeologists.

07:14
תפריט כתבה
Phys

Heading for the Atlantic Ocean to study the impact of climate change on ocean circulation‎

It is becoming increasingly urgent to study the effects of climate change on the global ocean system. Future projections indicate significant changes in the Mediterranean and Atlantic circulation systems, which could have unpredictable climatic consequences, especially for one of the most influential ocean currents in the global climate: the Atlantic Meridional Overturning Circulation (AMOC).

06:02
תפריט כתבה
Phys

Even morphologically similar pollinators carry distinct pollen assemblages‎

The body size, morphology and associated behavioral traits of flower-visiting insects strongly influence the quantity of pollen they transport. Thus, pollinators with similar appearances are often assumed to exert similar ecological effects on plants. However, pollinators' effects on plants are not determined solely by the amount of pollen they carry.

05:46
תפריט כתבה
Phys

Indian millets contain distinct lipid fingerprints with anti-diabetic and anti-inflammatory potential‎

Indian millets are a staple for the country's population of more than a billion. They are also gaining global popularity, with rising exports and a reputation as a climate-resilient crop. Now, new research shows that their nutritional value includes a rich diversity of lipids, including a previously undetected group that may offer potential health benefits. The research is published in the journal Food Chemistry.

05:31
תפריט כתבה
Phys

Climate models are missing the first warning signs of deadly Middle East heat waves, study finds‎

While the world's most advanced climate models successfully reproduce heat waves once they are underway, they consistently miss key atmospheric processes that trigger these events, potentially limiting the ability to anticipate extreme heat several days in advance.

05:05
תפריט כתבה
Phys

Are alien probes hiding in our backyard? A new study says we've barely looked‎

Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other solar systems, even if that was not their original intention. Five robotic explorers—Pioneer 10 and 11, Voyager 1 and 2, and New Horizons—are all on escape trajectories out of the solar system and might someday enter another one. They will no longer be operational at that point, but they serve as proof of concept that spacefaring civilizations do indeed build interstellar probes.

04:44
תפריט כתבה
Phys

Switzerland map reveals ground light and shade in 10-meter detail‎

Researchers have calculated light levels at the ground surface across Switzerland to within 10 meters, in both open and forested areas. The model even simulates the shadows cast by individual trees.

04:26
תפריט כתבה
Phys

Dark biodiversity helps solve Darwin's 160-year-old puzzle‎

An international research team, which included University of Tartu visiting doctoral student Wen-Gang Zhang and Professor of Botany Meelis Pärtel, has found a new solution to one of ecology's long-standing controversies—Darwin's naturalization conundrum, which addresses the question of why some species successfully establish in a new habitat while others do not. The research is published in the journal Proceedings of the National Academy of Sciences.

04:08
תפריט כתבה
Phys

Ultrasound unlocks protein from cauliflower waste and could add value to existing crops‎

An RMIT University innovation uses ultrasound to extract leaf protein from discarded cauliflower leaves, identifying a potential new use for vegetable scraps. The process could help food manufacturers turn vegetable waste into protein ingredients, reducing waste and adding value to existing crops.

04:08
תפריט כתבה
Phys

Rethinking plant photoprotection: New insights into antenna protein CP26‎

Plants must carefully strike a balance between harvesting sunlight to fuel photosynthesis and protecting themselves from light damage. Part of this balancing act is performed by antenna proteins that are bound to light-harvesting molecules inside plant chloroplasts. Mostly known for harvesting energy from sunlight, some antenna proteins can dissipate excess absorbed energy as heat through a photoprotection mechanism called non-photochemical quenching (NPQ).

03:46
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