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כתבות אחרונות מאתר 'Phys'
Phys

AI and drones can select the most resilient wheat‎

Making wheat more resilient to climate change without compromising yields has become an urgent priority for the agricultural sector. Now, a study led by a research team from the University of Barcelona and the Agrotecnio research center has identified an innovative way to address this challenge: combining advanced technology and artificial intelligence to select the best varieties of this crop.

04:23
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Phys

New research shows habitat restoration projects have paid off for Forest Park in St. Louis‎

Over the past few decades, a collaboration of St. Louis regional groups have partnered to be good stewards of Forest Park, one of the largest urban parks and wildlife areas in the country. Organizations such as Forest Park Forever have restored habitat, while scientists with the Saint Louis Zoo have partnered with conservation groups and universities, including WashU, to monitor wildlife populations.

03:26
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Phys

With drones, geophysics and artificial intelligence, researchers prepare to do battle against land mines‎

When Jasper Baur was a freshman at New York's Binghamton University, his interests centered on earth sciences. Then he got involved in a seemingly unrelated pursuit: harnessing drone-mounted geophysical instruments to aid in the slow, dangerous work of detecting land mines.

02:32
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Phys

Nicotine's last biosynthesis steps mapped in wild tobacco, ending a long mystery‎

Nicotine, a potent insecticidal alkaloid unique to the nightshade family, has been employed in agriculture as a pesticide since 1690. It also has therapeutic potential for neurological disorders such as Alzheimer's disease, Parkinson's disease, and depression. Despite its profound influence on human history, agriculture, and plant evolution, however, the final steps of nicotine biosynthesis have remained unclear until now.

02:32
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Phys

Underwater architects: Nest-building in cichlids reveals more than hardwired instinct‎

We associate nests with shelter, warmth, and a safe retreat—and usually picture a bird's nest made out of twigs, grass and feathers. Yet many other animals take advantage of such refuges, with nests being built by a diversity of species ranging from termites to great apes, which impress with their hugely varied forms and the wide array of materials used to construct them.

02:05
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Phys

Chang'e mission samples reveal how exogenous organic matter evolves on the moon‎

Elements essential to life, such as carbon, nitrogen, oxygen, phosphorus, and sulfur, were "delivered" to Earth and the moon during the early stages of the solar system via asteroids and comets impacting their surfaces. These exogenous materials may have provided the chemical building blocks necessary for the origin and early evolution of life on Earth. But extensive geological activity and biological processes on Earth have largely erased the direct records of these early inputs on our planet.

01:43
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Phys

Universal surface-growth law confirmed in two dimensions after 40 years‎

Crystals, bacterial colonies, flame fronts: the growth of surfaces was first described in the 1980s by the Kardar–Parisi–Zhang equation. Since then, it has been regarded as a fundamental model in physics, with implications for mathematics, biology, and computer science.

01:25
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Phys

Highway widening may be heating cities faster; here's what could curb it‎

U.S. cities are rapidly becoming urban heat islands, where these cities are significantly warmer than their surrounding area. Vast expanses of asphalt and concrete trap heat, while large, densely packed buildings disrupt wind flow and intensify the effect. But beyond parking lots and skyscrapers, recent research points to highways as another cause behind America's urban heat islands.

01:05
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Phys

'First contact' that may have led to complex life on Earth finally witnessed by scientists‎

On the shores of the west coast of Australia lies a window to our past: the stromatolites and microbial mats of Gathaagudu (Shark Bay).

01:05
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Phys

How bromoform wrecks ozone: Ultrafast 'roaming' step captured in 150 femtoseconds‎

The halomethane compound bromoform (CHBr3) has devastating effects on the ozone layer. In the upper layers of the atmosphere, bromoform reacts with UV radiation, releasing bromine molecules which destroy ozone molecules. This reaction, however, has long puzzled scientists; the molecules involved seem to wander relative to each other in a way that energetically does not make sense. Scientists at European XFEL have now revealed structural evidence for this roaming mechanism for the first time, establishing it as a universal characteristic of photochemical reactions.

00:44
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