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High-resolution weather data could pinpoint neighborhoods facing greatest heat stress

Heat stress is a leading cause of weather-related deaths and can be especially dangerous in cities, where phenomena like urban heat islands drive temperatures higher than in surrounding rural areas. Now, a new dataset developed by the U.S. National Science Foundation National Center for Atmospheric Research (NSF NCAR) aims to provide city governments and health officials with information that could minimize heat impacts on residents.

Phys.orgPhys.org1h ago

New species of 240-million-year-old prehistoric animal could reshape dinosaur origins timeline

A new prehistoric animal species from Tanzania dating to around 240 million years ago, during the Triassic period, has been described by an international team of researchers. Led by the University of Bristol, the new species, named Dinodontosaurus isiyavamanda, could help scientists refine the age of one of the world's most significant fossil sites and reshape the timeline of early dinosaur evolution.

Phys.orgPhys.org1h ago

Young, eco-anxious Canadians are the most likely to support disruptive tactics by environmental activists, study finds

The tolerance of individual Canadians for radical forms of environmental activism depends on several factors. Overall, however, Canadians do not support vandalism or violence as forms of protest. Those are the key findings of a new study by researchers from McGill University and Université Laval. The findings are published in the Canadian Journal of Political Science.

Phys.orgPhys.org2h ago

History is being rewritten at an archaeological site in Morocco. What the discovery of an ancient wall tells us

In the hills of northwestern Morocco, overlooking the river that gives the site its name, research at Oued Beht is bringing to light a previously unknown chapter of the region's past. The discovery of a substantial built structure suggests that, during the second millennium BC, communities in northwestern Africa were actively shaping their environment. They were also engaging in broader networks of interaction across the Mediterranean world.

Phys.orgPhys.org2h ago

Tracking the path of new world screwworm

New cases of New World screwworm have recently surfaced in the United States, highlighting the critical need to track its paths to determine where future infestations may occur. Researchers at the U.S. Department of Agriculture's (USDA) Agricultural Research Service (ARS) are employing predictive models as part of a forward-thinking approach to manage New World screwworm. This strategy allows USDA agencies to act earlier, respond faster and direct resources where they are most needed to protect U.S. livestock, pets and wildlife.

Phys.orgPhys.org3h ago

What are best options for controlling GSL dust, and what would they cost?

A new collaborative report from University of Utah researchers and coordinated by the Wilkes Center for Climate Science & Policy provides Utah Department of Natural Resources, Department of Environmental Quality and policymakers with a comprehensive analysis of the growing risks posed by dust from the exposed lakebed of Great Salt Lake, the potential costs of controlling that dust, and the long-term benefits of stabilizing lake levels.

Phys.orgPhys.org3h ago

Webb reveals dynamic panorama of star formation, including smallest known brown dwarfs

This starry view of the nearby star-forming region IC 348 is one of the largest images released to date from NASA's James Webb Space Telescope. Using Webb, astronomers searched IC 348 for brown dwarfs, which are less massive than the smallest stars. The researchers discovered brown dwarfs just twice the mass of Jupiter, bringing the study of these curious objects into a new mass range and revealing new insights about the star-formation process.

Phys.orgPhys.org3h ago

Disordered atoms steer shared light pulses by matching motion and timing

A research team at the Institute of Applied Physics at TU Darmstadt has shown for the first time that atoms that are completely disordered and in constant motion can nevertheless emit jointly directed light preferentially in one direction—even though neither the atoms nor their environment exhibit a direction—and that the strength of this asymmetry can be specifically adjusted. The paper is published in the journal Physical Review Letters.

Phys.orgPhys.org3h ago

How a pathogen turns flowers into leaves

Scientists have found how a protein produced by bacteria disrupts the mechanism that controls flower development in plants, turning reproductive organs into leaf-like structures. These findings shed light on a plant disease that is expected to spread as climate change expands the range of its insect vectors in northern latitudes. They used a synchrotron technique at ESRF, the European Synchrotron in Grenoble, France. The results are an Editor's Pick in the Journal of Biological Chemistry.

Phys.orgPhys.org4h ago

Great Salt Lake's ancient past reveals how quickly fresh water can disappear

From a mountainside overlooking Utah's Great Salt Lake, a time traveler turning back the clock 20,000 years would watch a dramatic transformation of the landscape. The shallow, salty lake below would swell into an immense body of fresh water, at one point reaching nearly 1,000 feet (305 meters) deep and covering more than 10 times the lake's modern area. Mountain ranges would become islands, and the new shoreline would move far beyond its current boundary.

Phys.orgPhys.org5h ago