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131,939 articles from ScienceDaily


Connecting the dots on food access

A new study simultaneously examined the preferences of community members and compared those with the community-based programs and resources available to identify the most viable strategies for addressing disparities in healthy food consumption.

Biologists create new genetic systems to neutralize gene drives

Addressing concerns about gene drive releases in the wild, scientists have developed two new genetic systems that halt or eliminate gene drives after release. Created in fruit flies, the e-CHACRs and ERACRs are powerful gene drive control mechanisms that were meticulously developed and tested at the genetic and molecular levels.

Mapping the 1.6 billion people who live near forests

Global maps of places where people and forests coexist show that an estimated 1.6 billion people live within 5 kilometers of a forest. The assessment, based on data from 2000 and 2012, showed that of these 1.6 billion 'forest-proximate people,' 64.5 percent were located in tropical countries, and 71.3 percent lived in countries classified as low or middle income by the World Bank.

Raids and bloody rituals among ancient steppe nomads

Traces of violence on 1700 year old skeletons allow researchers to reconstruct warfare and sacrifices of nomads in Siberia. An international and interdisciplinary team of anthropologists, archaeologists and specialists in forensic sciences performed a detailed and revealing analysis of the traumas found on the skeletal remains.

Nose's response to odors more than just a simple sum of parts

Based on highly sensitive recordings of neuron activity in the noses of mice, researchers have found that olfactory sensory neurons can exhibit suppression or enhancement of response when odors are mixed, overturning a long-standing view that the response is a simple sum with more complex processing only happening at later stages.

Promising computer simulations for stellarator plasmas

The turbulence code GENE (Gyrokinetic Electromagnetic Numerical Experiment), has proven to be very useful for the theoretical description of turbulence in the plasma of tokamak-type fusion devices. Extended for the more complex geometry of stellarator-type devices, computer simulations with GENE now indicate a new method to reduce plasma turbulence in stellarator plasmas. This could significantly...

How researchers look at the bird brain in action

How do birds make decisions and which brain regions are particularly active when they solve tasks? Researchers are investigating these questions. So far, only anesthetized birds and therefore passive experiments could be examined using the functional magnetic resonance imaging (fMRI). Thus, the examination of brain processes during active tasks was not possible. Now the researchers have...

VLBA makes first direct distance measurement to magnetar

Using the VLBA, astronomers have made the first direct geometric measurement of the distance to a magnetar. This precision measurement to one of the most magnetic objects in the Universe could help scientists determine if such objects are responsible for generating the mysterious Fast Radio Bursts.

Self-induced ultrafast demagnetization limits the amount of light diffracted from magnetic samples at soft x-ray energies

Free electron X-ray lasers deliver intense ultrashort pulses of x-rays, which can be used to image nanometer-scale objects in a single shot. When the x-ray wavelength is tuned to an electronic resonance, magnetization patterns can be made visible. When using increasingly intense pulses, however, the magnetization image fades away. The mechanism responsible for this loss in resonant magnetic...

Ecologists sound alarm on plastic pollution

Ecologists examining plastic pollution entering oceans, rivers and lakes around the world annually, outline potential impacts of various mitigation strategies over the coming decade. The researchers estimate the scale of human response needed to reduce future emissions and manage what's already floating around out there and recommend a fundamental shift to a framework based on recycling where...

A scientific first: How psychedelics bind to key brain cell receptor

For the first time, scientists solved the high-resolution structure of these compounds when they are actively bound to the 5-HT2A serotonin receptor on the surface of brain cells. This discovery is already leading to the exploration of more precise compounds that could eliminate hallucinations but still have strong therapeutic effects. Psilocybin - the psychedelic compound in mushrooms - has...

Curve at tip of shoes eases movement but may lead to weaker muscles, problems

The scientists found that the more curved a toe spring is, the less power the foot inside the shoe has to exert when pushing off from the ground while walking. That means foot muscles are doing less work, and this, the researchers hypothesize, may have consequences such as less endurance and make people more susceptible to medical conditions like plantar fasciitis.

Scientists 'scent train' honeybees to boost sunflowers' seed production

If you want a dog to hunt something down, it helps to let them sniff an item to pick up the scent. Now, researchers have found that scent training honeybees might work in a similar way -- and that this approach could make bees more efficient in pollinating crops. The findings show that honeybees given food scented with sunflower odors led to a significant increase in sunflower crop production.

Quizzes improve academic performance

Students who are quizzed over class material at least once a week tend to perform better on midterm and final exams compared to students who did not take quizzes, according to a new meta-analysis. The researchers found in addition to frequency, immediate feedback from instructors also seemed to positively impact student performance.

New mathematical tool can select the best sensors for the job

In the 2019 Boeing 737 Max crash, the recovered black box from the aftermath hinted that a failed pressure sensor may have caused the ill-fated aircraft to nose dive. This incident and others have fueled a larger debate on sensor selection, number and placement to prevent the reoccurrence of such tragedies. Researchers have now developed a comprehensive mathematical framework that can help...