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261,088 articles from PhysOrg

Marine viruses: Submerged players of climate change

While the world has been heavily focused on the usual players of global climate change, like fossil fuels and deforestation, a group of unlikely contenders has emerged from the depths of the ocean—marine viruses. These minuscule but mighty entities are now stealing the limelight as scientists unravel their profound influence on our planet's climate.

Seismic waves convey lithospheric delamination mechanism in South China

A research team led by Prof. Zhang Haijiang from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, and Prof. Hou Zengqian from Chinese Academy of Geological Sciences, revealed the seismically imaged lithospheric delamination and its controls on the Mesozoic Magmatic Province in South China by using a new joint seismic inversion algorithm. The study was...

Importance of Wolbachia-mediated biocontrol to reduce dengue in Bangladesh and other dengue-endemic developing countries

Mosquito-borne diseases, particularly dengue and chikungunya have become global threats, infecting millions of people worldwide, including developing countries of Southeast Asia and Latin America. Bangladesh, like many other developing countries, is experiencing frequent dengue outbreaks. This article, therefore, critically discusses the current status of dengue disease, vector control approaches,...

Underwater noise shown to disturb feeding behavior of marine organisms

Many marine organisms, such as fish, marine mammals and crustaceans, produce and use sound to navigate, reproduce, detect prey and avoid predators. However, anthropogenic sound, for example from the construction and operation of offshore wind farms, drilling, seismic surveys and shipping, is changing the acoustic landscape in the ocean.

Image: Hubble observes jellyfish galaxy JO206

The jellyfish galaxy JO206 trails across this image from the NASA/ESA Hubble Space Telescope, showcasing a colorful star-forming disk surrounded by a pale, luminous cloud of dust. A handful of foreground bright stars with crisscross diffraction spikes stands out against an inky black backdrop at the bottom of the image. JO206 lies over 700 million light-years from Earth in the constellation...

New study takes a high-level look at Nazca boobies' breeding

Nazca boobies can live to 28 years of age, but in their late teens, their ability to raise chicks declines substantially. Why their breeding drops in old age has plagued Wake Forest University Professor of Biology David Anderson for years. But a new study, published in Ecology and Evolution, may help answer the question, by looking at their ability to forage, or search for and capture food.

Wireless sensor enables real-time spoilage alerts on food

Food waste and food-borne diseases are among the most critical problems urban populations face today. They contribute to greenhouse emissions tremendously and amplify economic and environmental costs. Since food spoilage remains the main reason for this waste, the circumstances of processing, transporting, and preserving food still need to be improved in line with current technological...

Scientists demonstrate 3D 'bio-printing' inside organoids growing in hydrogels

Scientists from the NIHR Great Ormond Street Hospital Biomedical Research Centre (a collaboration between GOSH and UCL), London, and University of Padova, Italy, have shown for the first time how 3D printing can be achieved inside "mini-organs" growing in hydrogels—controlling their shape, activity, and even forcing tissue to grow into "molds."

Scientists make a surprising discovery about magnetic defects in topological insulators

Scientists from the Department of Energy's Ames National Laboratory made an intriguing discovery while conducting experiments to characterize magnetism in a material known as a dilute magnetic topological insulator where magnetic defects are introduced. Despite this material's ferromagnetism, the team discovered strong antiferromagnetic interactions between some pairs of magnetic defects that play...

Novel ferroelectrics for more efficient microelectronics

When we communicate with others over wireless networks, information is sent to data centers where it is collected, stored, processed, and distributed. As computational energy usage continues to grow, it is on pace to potentially become the leading source of energy consumption in this century. Memory and logic are physically separated in most modern computers, and therefore the interaction between...

Cryo-EM study shows zinc transporter has built-in self-regulating sensor

Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have determined the atomic-level structure of a zinc-transporter protein, a molecular machine that regulates levels of this crucial trace metal micronutrient inside cells. As described in a paper just published in Nature Communications, the structure reveals how the cellular membrane protein shifts its shape to move...

Researchers discover jet streams in Mars' magnetosheath

A research team from Umeå University and the Swedish Institute of Space Physics in Kiruna has discovered jet streams in the magnetosheath of Mars using data collected by NASA's MAVEN spacecraft. This is the first time such a jet has been found in the magnetosheath of a planet other than Earth. The results are published in the journal Science Advances.

Liquid metal sticks to surfaces without a binding agent

Everyday materials such as paper and plastic could be transformed into electronic "smart devices" by using a simple new method to apply liquid metal to surfaces, according to scientists in Beijing, China. The study, published June 9 in the journal Cell Reports Physical Science, demonstrates a technique for applying a liquid metal coating to surfaces that do not easily bond with liquid metal. The...

Wolves in Minnesota switch to fish as a main source of food in the spring

A team of wildlife specialists from the University of Minnesota, the University of Manitoba and Voyageurs National Park has found that wild wolves living in Minnesota tend to switch from feasting on larger prey to fish as their main source of food in the spring. In their study, reported in the journal Royal Society Open Science, the group used a variety of methods to study the eating behavior of...