Referral Banners

Friday, November 14, 2014

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Intergalactic 'wind' is stripping galaxies of star-forming gas

Posted: 13 Nov 2014 12:29 PM PST

Astronomers have provided the first direct evidence that an intergalactic 'wind' is stripping galaxies of star-forming gas as they fall into clusters of galaxies. The observations help explain why galaxies found in clusters are known to have relatively little gas and less star formation when compared to non-cluster or 'field' galaxies.

The science behind total recall: New player in brain function and memory

Posted: 13 Nov 2014 12:29 PM PST

Is it possible to change the amount of information the brain can store? Maybe, according to a new international study. The research has identified a molecule that puts a brake on brain processing and when removed, brain function and memory recall is improved.

Lightning expected to increase by 50 percent with global warming

Posted: 13 Nov 2014 11:21 AM PST

Atmospheric scientists looked at predictions of precipitation and cloud buoyancy in 11 different climate models and concluded that their combined effect will generate 50 percent more electrical discharges to the ground by the end of the century because of global warming. The main cause is water vapor, which fuels explosive deep convection in the atmosphere. The more convection, the greater the charge separation and the more cloud-to-ground strikes.

Magnetic fields frozen into meteorite grains tell a shocking tale of solar system birth

Posted: 13 Nov 2014 11:21 AM PST

Astrophysicists say that magnetic clues in a meteorite outline the earliest steps in the formation of the solar system and Earth-like planets.

Bacteria become 'genomic tape recorders', recording chemical exposures in their DNA

Posted: 13 Nov 2014 11:20 AM PST

Engineers have transformed the genome of the bacterium E. coli into a long-term storage device for memory. They envision that this stable, erasable, and easy-to-retrieve memory will be well suited for applications such as sensors for environmental and medical monitoring.

Females protect offspring from infanticide by forcing males to compete through sperm

Posted: 13 Nov 2014 11:20 AM PST

New research shows the females of some species will have many mates to ensure unclear paternity, so that males can't resort to killing their rival's offspring for fear of killing their own. This forces males to evolve to compete through sperm quantity, leading to ever-larger testicles. Scientists find that as testis size increases, infanticide disappears.

Bio-inspired bleeding control: Synthesized platelet-like nanoparticles created

Posted: 13 Nov 2014 11:00 AM PST

Stanching the free flow of blood from an injury remains a holy grail of clinical medicine. Controlling blood flow is a primary concern and first line of defense for patients and medical staff in many situations, from traumatic injury to illness to surgery. If control is not established within the first few minutes of a hemorrhage, further treatment and healing are impossible. Taking a cue from the human body's own coagulation processes, researchers have synthesized platelet-like nanoparticles that can do more than clot blood.

The party's over for these youthful compact galaxies

Posted: 13 Nov 2014 11:00 AM PST

Scientists have uncovered young, massive, compact galaxies whose raucous star-making parties are ending early. The firestorm of star birth has blasted out most of the remaining gaseous fuel needed to make future generations of stars. Now the party's over for these gas-starved galaxies, and they are on track to possibly becoming so-called "red and dead galaxies," composed only of aging stars.

Alaska shows no signs of rising Arctic methane, NASA study shows

Posted: 13 Nov 2014 10:48 AM PST

Despite large temperature increases in Alaska in recent decades, a new analysis of NASA airborne data finds that methane is not being released from Alaskan soils into the atmosphere at unusually high rates, as recent modeling and experimental studies have suggested. The new result shows that the changes in this part of the Arctic have not yet had enough impact to affect the global methane budget.

Researchers silence leading cancer-causing gene

Posted: 13 Nov 2014 09:33 AM PST

A new approach to block the KRAS oncogene, one of the most frequently mutated genes in human cancer, has been developed by researchers. The approach offers another route to attack KRAS, which has proven to be an elusive and frustrating target for drug developers.

Intimidating chimpanzee males are more likely to become fathers

Posted: 13 Nov 2014 09:29 AM PST

Chimpanzee males that treat females aggressively father more offspring over time. The findings are based on genetic evidence of paternity and suggest that sexual coercion via long-term intimidation is an adaptive strategy for males in chimpanzee society.

Is there organic matter on Mars? Chloromethane not due to contamination from Earth, research suggests

Posted: 13 Nov 2014 08:00 AM PST

Organic matter recently detected by NASA's robotic rover Curiosity is probably not due to contamination brought from Earth as researchers originally thought. A team of German and British scientists now suggests that the gaseous chlorinated organic compound -- chloromethane -- recently found on the Red Planet most likely comes from the soil of Mars, with its carbon and hydrogen probably deriving from meteorites that fell on the planet's surface.

Switching on a dime: How plants function in shade, light

Posted: 13 Nov 2014 04:51 AM PST

Plants grow in environments where the availability of light fluctuates quickly and drastically, for example from the shade of clouds passing overhead or of leaves on overhanging trees blowing in the wind. Plants thus have to rapidly adjust photosynthesis to maximize energy capture while preventing excess energy from causing damage. So how do plants prevent these changes in light intensity from affecting their ability to harvest the energy they need to survive? The response has to be extremely swift.

Did men evolve navigation skill to find mates? Spatial ability, roaming distance linked to number of lovers

Posted: 13 Nov 2014 04:48 AM PST

A new study of two African tribes found evidence that men evolved better navigation ability than women because men with better spatial skills – the ability to mentally manipulate objects – can roam farther and have children with more mates.

Philae, the ‘Happy Lander’: Instruments delivering images and data from comet's surface

Posted: 13 Nov 2014 04:39 AM PST

Rosetta's lander Philae is safely on the surface of Comet 67P/Churyumov-Gerasimenko. First analysis of the touchdown data suggests that the lander bounced twice before settling on the surface of the comet. The lander remains unanchored to the surface, but the instruments are running and are delivering images and data.

Genetic tweak gave yellow fever mosquitoes a nose for human odor

Posted: 12 Nov 2014 05:33 PM PST

One of the world's deadliest mosquitoes sustains its taste for human blood thanks in part to a genetic tweak that makes it more sensitive to human odor, according to new research.

The backwards brain? How brain maps develop to help us perceive the world

Posted: 12 Nov 2014 01:10 PM PST

Scientists reveal that physically moving forward actually trains the brain to perceive the world normally. The findings also show that, the order in which we see things could help the brain calibrate how we perceive time, as well as the objects around us.

Electrical efficiency by engineering warmer superconductors with atom-by-atom control

Posted: 12 Nov 2014 10:20 AM PST

New research suggests for the first time how scientists might deliberately engineer superconductors that work at higher temperatures. These findings open a new chapter in the 30-year quest to develop superconductors that operate at room temperature, which could revolutionize society by making virtually everything that runs on electricity much more efficient.

3-D deep-imaging advance likely to drive new biological insights

Posted: 07 Nov 2014 12:46 PM PST

In a significant technical advance, a team of neuroscientists has devised a fast, inexpensive imaging method for probing the molecular intricacies of large biological samples in three dimensions, an achievement that could have far reaching implications in a wide array of basic biological investigations.

No comments: