Sabtu, 25 April 2015

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Beyond genes: Are centrioles carriers of biological information?

Posted: 24 Apr 2015 05:56 AM PDT

Scientists have discover that certain cell structures, the centrioles, could act as information carriers throughout cell generations. The discovery raises the possibility that transmission of biological information could involve more than just genes. Centrioles may actually be carriers of information, which holds profound implications for biology and disease treatment.

Giant cosmic tsunami wakes up comatose galaxies

Posted: 24 Apr 2015 05:50 AM PDT

Galaxies are often found in clusters, which contain many 'red and dead' members that stopped forming stars in the distant past. Now an international team of astronomers have discovered that these comatose galaxies can sometimes come back to life. If clusters of galaxies merge, a huge shock wave can drive the birth of a new generation of stars -- the sleeping galaxies get a new lease of life.

Scientists announce final trial results of the world’s most advanced malaria vaccine

Posted: 23 Apr 2015 06:13 PM PDT

The first malaria vaccine candidate (RTS,S/AS01) to reach phase 3 clinical testing is partially effective against clinical disease in young African children up to 4 years after vaccination, according to final trial data. The results suggest that the vaccine could prevent a substantial number of cases of clinical malaria, especially in areas of high transmission.

Fat tissue controls brain's response to food scarcity, helping regulate optimal amount of body fat for brain function

Posted: 23 Apr 2015 09:48 AM PDT

An enzyme secreted by the body's fat tissue controls energy levels in the brain, according to new research. The findings, in mice, underscore a role for the body's fat tissue in controlling the brain's response to food scarcity, and suggest there is an optimal amount of body fat for maximizing health and longevity. The findings may help explain the many studies that show a survival benefit to having a body mass index toward the low end of what is considered overweight.

Gene-editing technique offers hope for hereditary diseases

Posted: 23 Apr 2015 09:48 AM PDT

Scientists have used molecular "scissors" to eliminate mitochondrial mutations in eggs and embryos. They are now investigating the possibility of translating this technology to the clinic in human eggs and embryos.

Personalized medicine: Device identifies drugs that will work best for each patient

Posted: 22 Apr 2015 11:23 AM PDT

More than 100 drugs have been approved to treat cancer, but predicting which ones will help a particular patient is an inexact science at best. A new implantable device may change that.
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Jumat, 24 April 2015

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Are bees 'hooked' on nectar containing pesticides?

Posted: 23 Apr 2015 08:41 PM PDT

Bees are attracted to nectar containing common pesticides, scientists have discovered. This could increase their chances of exposure to high levels of pesticides.

Fracking? Injecting wastewater? New insight on ground shaking from human-made earthquakes

Posted: 23 Apr 2015 06:56 PM PDT

Significant strides in science have been made to better understand potential ground shaking from induced earthquakes, which are earthquakes triggered by human practices. Earthquake activity has sharply increased since 2009 in the central and eastern United States. Many questions have been raised about whether hydraulic fracturing -- commonly referred to as "fracking" -- is responsible for the recent increase of earthquakes. The increase has been linked to industrial operations that dispose of wastewater by injecting it into deep wells.

Second possible specimen of 'pocket shark' ever found

Posted: 23 Apr 2015 03:27 PM PDT

An extraordinarily rare ocean discovery of an inches-long 'pocket shark' has been made. Sharks come in all shapes and sizes and are best known as a dominant predator in the marine food web. Understanding their movements, behaviors and anatomies gives fishery managers a better idea of their diets and relationships with other species.

Long-term exposure to air pollution may pose risk to brain structure, cognitive functions

Posted: 23 Apr 2015 03:23 PM PDT

Air pollution, even at moderate levels, has long been recognized as a factor in raising the risk of stroke. A new study suggests that long-term exposure can cause damage to brain structures and impair cognitive function in middle-aged and older adults.

Astronomers find runaway galaxies

Posted: 23 Apr 2015 12:47 PM PDT

We know of about two dozen runaway stars, and have even found one runaway star cluster escaping its galaxy forever. Now, astronomers have spotted 11 runaway galaxies that have been flung out of their homes to wander the void of intergalactic space.

Scientists see deeper Yellowstone magma

Posted: 23 Apr 2015 11:27 AM PDT

Seismologists have discovered and made images of a reservoir of hot, partly molten rock 12 to 28 miles beneath the Yellowstone supervolcano, and it is 4.4 times larger than the shallower, long-known magma chamber. The hot rock in the newly discovered, deeper magma reservoir would fill the 1,000-cubic-mile Grand Canyon 11.2 times.

World Happiness Report 2015 ranks happiest countries

Posted: 23 Apr 2015 10:03 AM PDT

Since it was first published in 2012, the World Happiness Report demonstrated that well-being and happiness are critical indicators of a nation's economic and social development, and should be a key aim of policy. This year's report looks at the changes in happiness levels in 158 countries, and examines the reasons behind the statistics.

A focus on flight: Birds use just two postures to avoid obstacles during flight

Posted: 23 Apr 2015 10:03 AM PDT

A new study shows birds use two highly stereotyped postures to avoid obstacles in flight. The study could open the door to new ways to program drones and other unmanned aerial vehicles to avoid similar obstacles.

Entire genomes of woolly mammoths mapped: Clues to extinction, possibility of bringing mammoths back

Posted: 23 Apr 2015 09:48 AM PDT

An international team of researchers has sequenced the nearly complete genome of two Siberian woolly mammoths -- revealing the most complete picture to date -- including new information about the species' evolutionary history and the conditions that led to its mass extinction at the end of the Ice Age.

Celestial fireworks celebrate Hubble's 25th anniversary

Posted: 23 Apr 2015 07:26 AM PDT

The glittering tapestry of young stars flaring to life in this new NASA/ESA Hubble Space Telescope image aptly resembles an exploding shell in a fireworks display. This vibrant image of the star cluster Westerlund 2 has been released to celebrate Hubble's 25th year in orbit and a quarter of a century of new discoveries, stunning images and outstanding science.

Scientists create the sensation of invisibility

Posted: 23 Apr 2015 07:23 AM PDT

The power of invisibility has long fascinated man and inspired the works of many great authors and philosophers. A team of neuroscientists now reports a perceptual illusion of having an invisible body, and show that the feeling of invisibility changes our physical stress response in challenging social situations.

Just two weeks of drinking sugary drinks boost risk factors for heart disease, study suggests

Posted: 22 Apr 2015 11:25 AM PDT

Beverages sweetened with low, medium and high amounts of high-fructose corn syrup significantly increase risk factors for cardiovascular disease, even when consumed for just two weeks by young, healthy men and women. Consumption of sugary drinks increases risk factors for cardiovascular disease in a dose-dependent manner -- the more you drink, the greater the risk. The study is the first to demonstrate such a direct, dose-dependent relationship.
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