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כתבות אחרונות מאתר 'Phys'
Phys

The herring fishery that took 400 years to rebound—and what it teaches us today‎

From the 13th to the 16th century, herring from the Sound—the strait in the Baltic Sea between Denmark and Sweden—was one of northern Europe's most important trade goods. Salted herring from the so-called Skanör-Falsterbo fishery fed large parts of Europe. Around 1570, however, the fishery collapsed rapidly, with far-reaching consequences for trade, politics and society. It took almost 400 years, until the 1950s, for catches to reach comparable levels again.

12:15
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Phys

Waves find order in the chaos of an oddly shaped cavity‎

When light or sound bounces around inside an oddly shaped room, its reflections can quickly become difficult to predict. But new research led by scientists at the Advanced Science Research Center at the CUNY Graduate Center (CUNY ASRC) shows that waves can behave very differently when they travel through a special class of materials.

12:15
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Phys

New formulation helps RNA vaccines withstand high temperatures‎

RNA vaccines, which have proved effective against COVID-19, are now being developed for many other diseases, including cancer. One drawback is that they require ultracold storage, but MIT researchers have found a promising way to overcome that limitation.

12:15
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Phys

SpaceX aims to put Starship in orbit for the first time‎

Three years after its first test flight, SpaceX's Starship rocket will attempt Monday to enter Earth orbit, a key step in developing the massive launch vehicle for future missions to the moon and Mars.

11:59
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Phys

The wildfires choking Indonesia, sparking regional haze‎

For weeks, Indonesia has been battling fires that have burned vast swaths of forest and peat ecosystems, causing toxic haze to blanket parts of the country, Malaysia and Singapore.

11:59
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Phys

Mediterranean rockrose extract shows fungicidal activity against common skin infections‎

A polyphenol-rich extract from Cistus salviifolius, a Mediterranean rockrose species traditionally used to treat skin conditions, has shown fungicidal activity against several dermatophytes, the fungi responsible for superficial infections of the skin, hair and nails.

11:29
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Phys

Antarctic radar data improves forecasts for Southern Hemisphere atmospheric rivers in tests‎

Weather forecasts in the Southern Hemisphere (SH) are generally less accurate than those in the Northern Hemisphere because Antarctica and the surrounding Southern Ocean have relatively few weather observations. With limited information about atmospheric conditions in one of the world's most remote regions, forecasting models often struggle to predict the movement of weather systems. This is especially true for atmospheric rivers that can trigger heavy rain, snowfall, flooding and strong winds across Australia, New Zealand, South America and Antarctica. Improving forecasts of these weather systems is essential for protecting lives and property, supporting aviation and shipping, and helping communities prepare for hazardous weather.

10:27
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Phys

New metal-free molecules glow deep red in water and boost MRI contrast in test images‎

Bioimaging technologies, such as fluorescence imaging (FI) and magnetic resonance imaging (MRI), are powerful tools in basic research and clinical medicine. But they have drawbacks. FI allows researchers to visualize cells and other biological processes at high resolution, but it lacks imaging depth. MRI can capture images deep within the body, but it lacks the single-cell resolution provided by FI. Furthermore, MRI contrast agents contain paramagnetic metals, such as gadolinium, that can potentially cause adverse side effects.

09:26
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