ScienceDaily: Top Science News |
- Taking the lead out of a promising solar cell: Environmentally friendly solar cell pushes forward the 'next big thing in photovoltaics'
- Global warming not uniform around the globe: Some areas were recently cooling
- Functioning of aged brains and muscles in mice made younger: More progress with GDF 11, anti-aging protein
- New insight may help predict volcanic eruption behavior
- Environmental factors as important as genes in understanding autism
- Scores of bullying victims bringing weapons to school
- Many infants still not placed on their backs to sleep
- Discovery of anti-appetite molecule released by fiber could help tackle obesity
- Safe(bee) in numbers: Bees stick to known safey zones, learn to avoid danger
| Posted: 04 May 2014 10:32 AM PDT Researchers are the first to develop a solar cell with good efficiency that uses tin instead of lead perovskite as the harvester of light. The low-cost, environmentally friendly solar cell can be made easily using 'bench' chemistry -- no fancy equipment or hazardous materials. Perovskite solar cells are being touted as the 'next big thing in photovoltaics.' Lead perovskite has achieved 15 percent efficiency, and tin perovskite should be able to match -- and possibly surpass -- that.  |
| Global warming not uniform around the globe: Some areas were recently cooling Posted: 04 May 2014 10:32 AM PDT New research shows the first detailed look at global land surface warming trends over the last 100 years, illustrating precisely when and where different areas of the world started to warm up or cool down.  |
| Posted: 04 May 2014 10:32 AM PDT Scientists have shown that a protein they previously demonstrated can make the failing hearts in aging mice appear more like those of young health mice, similarly improves brain and skeletal muscle function in aging mice. In two separate articles scientists report that injections of a protein known as GDF11, which is found in humans as well as mice, improved the exercise capability of mice equivalent in age to that of about a 70-year-old human.  |
| New insight may help predict volcanic eruption behavior Posted: 04 May 2014 10:32 AM PDT A new discovery in the study of how lava dome volcanoes erupt may help in the development of methods to predict how a volcanic eruption will behave, say scientists. Volcanologists have discovered that a process called frictional melting plays a role in determining how a volcano will erupt, by dictating how fast magma can ascend to the surface, and how much resistance it faces en-route.  |
| Environmental factors as important as genes in understanding autism Posted: 04 May 2014 06:56 AM PDT Environmental factors are more important than previously thought in understanding the causes of autism, and equally as important as genes, according to the largest study to date to look at how autism runs in families. The study also provides measures of individual risk for children who have a relative with autism.  |
| Scores of bullying victims bringing weapons to school Posted: 04 May 2014 06:55 AM PDT An estimated 200,000 high school students who are bullied bring weapons to school, according to research. "Victims of bullying who have been threatened, engaged in a fight, injured, or had property stolen or damaged are much more likely to carry a gun or knife to school," said the study's senior investigator. Results showed that 20 percent of high school students reported being victims of bullying. Those who were bullied were more likely to be in lower grades, females and white.  |
| Many infants still not placed on their backs to sleep Posted: 03 May 2014 05:27 AM PDT Since 1994, parents have been urged to put their babies to sleep on their backs to reduce the risk of sudden infant death syndrome. It appears many caregivers have not gotten the message, and health care providers have not done enough to educate families.  |
| Discovery of anti-appetite molecule released by fiber could help tackle obesity Posted: 30 Apr 2014 05:30 AM PDT A long-standing mystery has been addressed about how dietary fiber supresses appetite. An international team of researchers identified an anti-appetite molecule called acetate that is naturally released when we digest fiber in the gut. Once released, the acetate is transported to the brain where it produces a signal to tell us to stop eating. This confirms the natural benefits of increasing the amount of fiber in our diets to control over-eating and could also help develop methods to reduce appetite.  |
| Safe(bee) in numbers: Bees stick to known safey zones, learn to avoid danger Posted: 29 Apr 2014 05:58 PM PDT Bumblebees can distinguish between safe and dangerous environments, and are attracted to land on flowers popular with other bees when exposed to perilous situations, according to new research. "It's similar to walking through a bad neighbourhood -- you're more likely to choose a busier route, where there are lots of other people around than a deserted street, to get to your destination, since your chances of being attacked are probably lower," a co-author stated.  |
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