ScienceDaily: Latest Science News


The universal 'anger face': Each element makes you look physically stronger and more formidable

Posted: 28 Aug 2014 03:48 PM PDT

Each element of the anger face makes the person expressing it appear physically stronger and more formidable.

NASA's Spitzer Space Telescope witnesses asteroid smashup

Posted: 28 Aug 2014 02:01 PM PDT

NASA's Spitzer Space Telescope has spotted an eruption of dust around a young star, possibly the result of a smashup between large asteroids. This type of collision can eventually lead to the formation of planets.

Flapping baby birds give clues to origin of flight

Posted: 28 Aug 2014 02:00 PM PDT

The origin of flight is a contentious issue: some argue that tree-climbing dinosaurs learned to fly in order to avoid hard falls. Others favor the story that theropod dinosaurs ran along the ground and pumped their forelimbs to gain lift, eventually talking off. New evidence showing the early development of aerial righting in birds favors the tree-dweller hypothesis.

Second-hand e-cig smoke compared to regular cigarette smoke

Posted: 28 Aug 2014 11:28 AM PDT

Second-hand e-cig smoke has 10 times less particulate matter than regular cigarette smoke; but higher levels of certain toxic metals, a new study finds.

How the zebrafish gets its stripes: Uncovering how beautiful color patterns can develop in animals

Posted: 28 Aug 2014 11:27 AM PDT

The zebrafish, a small fresh water fish, owes its name to a striking pattern of blue stripes alternating with golden stripes. Three major pigment cell types, black cells, reflective silvery cells, and yellow cells emerge during growth in the skin of the tiny juvenile fish and arrange as a multi-layered mosaic to compose the characteristic color pattern. While it was known that all three cell types have to interact to form proper stripes, the embryonic origin of the pigment cells that develop the stripes of the adult fish has remained a mystery up to now. Scientists have now discovered how these cells arise and behave to form the 'zebra' pattern.

Prehistoric migrations: DNA study unravels the settlement history of the New World Arctic

Posted: 28 Aug 2014 11:27 AM PDT

A new DNA study unravels the settlement history of the New World Arctic. We know people have lived in the New World Arctic for about 5,000 years. Archaeological evidence clearly shows that a variety of cultures survived the harsh climate in Alaska, Canada and Greenland for thousands of years. Despite this, there are several unanswered questions about these people.

Home is where the microbes are

Posted: 28 Aug 2014 11:27 AM PDT

A person's home is their castle, and they populate it with their own subjects: millions and millions of bacteria. Scientists have detailed the microbes that live in houses and apartments. The results shed light on the complicated interaction between humans and the microbes that live on and around us. Mounting evidence suggests that these microscopic, teeming communities play a role in human health and disease treatment and transmission.

New research reveals how wild rabbits were genetically transformed into tame rabbits

Posted: 28 Aug 2014 11:27 AM PDT

The genetic changes that transformed wild animals into domesticated forms have long been a mystery. An international team of scientists has now made a breakthrough by showing that many genes controlling the development of the brain and the nervous system were particularly important for rabbit domestication. The study gives answers to many genetic questions.

Electric current to brain boosts memory: May help treat memory disorders from stroke, Alzheimer's, brain injury

Posted: 28 Aug 2014 11:27 AM PDT

Stimulating a region in the brain via non-invasive delivery of electrical current using magnetic pulses, called Transcranial Magnetic Stimulation, improves memory. The discovery opens a new field of possibilities for treating memory impairments caused by conditions such as stroke, early-stage Alzheimer's disease, traumatic brain injury, cardiac arrest and the memory problems that occur in healthy aging.

Astronomy: Radio telescopes settle controversy over distance to Pleiades

Posted: 28 Aug 2014 11:27 AM PDT

A worldwide network of radio telescopes measured the distance to the famous star cluster the Pleiades to an accuracy within 1 percent. The result resolved a controversy raised by a satellite's measurement that now is shown to be wrong. The incorrect measurement had challenged standard models of star formation and evolution.

Genomic sequencing reveals mutations, insights into 2014 Ebola outbreak

Posted: 28 Aug 2014 11:27 AM PDT

In response to an ongoing, unprecedented outbreak of Ebola virus disease in West Africa, a team of researchers has rapidly sequenced and analyzed more than 99 Ebola virus genomes. Their findings could have important implications for rapid field diagnostic tests.

From bite site to brain: How rabies virus hijacks and speeds up transport in nerve cells

Posted: 28 Aug 2014 11:27 AM PDT

Rabies is usually transmitted through the bite of an infected animal into muscle tissue of the new host. From there, the virus travels all the way to the brain where it multiplies and causes the usually fatal disease. A new article sheds light on how the virus hijacks the transport system in nerve cells to reach the brain with maximal speed and efficiency.

Mystery solved: 'Sailing stones' of Death Valley seen in action for the first time

Posted: 28 Aug 2014 11:19 AM PDT

Racetrack Playa is home to an enduring Death Valley mystery. Littered across the surface of this dry lake, also called a "playa," are hundreds of rocks -- some weighing as much as 320 kilograms (700 pounds) -- that seem to have been dragged across the ground, leaving synchronized trails that can stretch for hundreds of meters.

Small molecule acts as on-off switch for nature's antibiotic factory: Tells Streptomyces to either veg out or get busy

Posted: 28 Aug 2014 10:58 AM PDT

Biochemists have identified the developmental on-off switch for Streptomyces, a group of soil microbes that produce more than two-thirds of the world's naturally derived antibiotic medicines. Their hope now would be to see whether it is possible to manipulate this switch to make nature's antibiotic factory more efficient.

Marine protected areas inadequate for protecting fish and ocean ecology, study finds

Posted: 28 Aug 2014 10:58 AM PDT

A new study reports that an expansion of marine protected areas is needed to protect fish species that perform key ecological functions. According to investigators, previous efforts at protecting fish have focused on saving the largest numbers of species, often at the expense of those species that provide key and difficult-to-replace ecological functions.

Up to 3,000 times the bacterial growth on hollow-head toothbrushes

Posted: 28 Aug 2014 08:52 AM PDT

Solid-head power toothbrushes retain less bacteria compared to hollow-head toothbrushes, according to new research.

Neuroscientists watch imagination happening in the brain

Posted: 28 Aug 2014 08:09 AM PDT

By showing people their own photos during MRI sessions, neuroscientists distinguished between brain activity that is specific to memory and activity that is specific to imagination.

Global warming pioneer calls for carbon dioxide to be taken from atmosphere and stored underground

Posted: 28 Aug 2014 08:09 AM PDT

Wally Broeker, the first person to alert the world to global warming, has called for atmospheric carbon dioxide to be captured and stored underground.

Ancient metal workers were not slaves but highly regarded craftsmen

Posted: 28 Aug 2014 08:09 AM PDT

In the course of ongoing excavations at Timna Valley, archaeologists analyzed remnants of food eaten by copper smelters 3,000 years ago. This analysis indicates that the laborers operating the furnaces were in fact skilled craftsmen who enjoyed high social status and adulation. They believe their discovery may have ramifications for similar sites across the region.

Synthesis produces new fungus-derived antibiotic

Posted: 28 Aug 2014 08:09 AM PDT

A fortuitous collaboration has led to the total synthesis of a recently discovered natural antibiotic. The laboratory recreation of a fungus-derived antibiotic, viridicatumtoxin B, may someday help bolster the fight against bacteria that evolve resistance to treatments in hospitals and clinics around the world.

Indoor mold poses health risk to asthma sufferers

Posted: 28 Aug 2014 08:09 AM PDT

By critically reviewing the findings from 17 studies in eight different countries, the research has found that the presence of several types of mould can lead to breathing problems in asthma sufferers, as well as increasing the likelihood of developing the condition.

Quantum physics enables revolutionary imaging method

Posted: 28 Aug 2014 08:08 AM PDT

Researchers have developed a fundamentally new quantum imaging technique with strikingly counter-intuitive features. For the first time, an image has been obtained without ever detecting the light that was used to illuminate the imaged object, while the light revealing the image never touches the imaged object.

Study shows where on the planet new roads should and should not go

Posted: 28 Aug 2014 08:06 AM PDT

Researchers have created a 'large-scale zoning plan' that aims to limit the environmental costs of road expansion while maximizing its benefits for human development.

Paleontology: Oldest representative of a weird arthropod group

Posted: 28 Aug 2014 06:14 AM PDT

Biologists have assigned a number of 435-million-year-old fossils to a new genus of predatory arthropods. These animals lived in shallow marine habitats and were far less eye-catching than related forms found in Jurassic strata.

Avatars make the Internet sign to deaf people

Posted: 28 Aug 2014 06:12 AM PDT

It is challenging for deaf people to learn a sound-based language, since they are physically not able to hear those sounds. Hence, most of them struggle with written language as well as with text reading and comprehension. Therefore, most website content remains inaccessible for them. Computer scientists want to change the situation by means of a method they developed: animated online characters display content in sign language. In the long term, deaf people would be able to use the technique to communicate on online platforms via sign language.

Readers with dyslexia have disrupted network connections in the brain, map the circuitry of dyslexia shows

Posted: 28 Aug 2014 06:12 AM PDT

Dyslexia, the most commonly diagnosed learning disability in the United States, is a neurological reading disability that occurs when the regions of the brain that process written language don't function normally. The use of non-invasive functional neuroimaging tools has helped characterize how brain activity is disrupted in dyslexia. However, most prior work has focused on only a small number of brain regions, leaving a gap in our understanding of how multiple brain regions communicate with one another through networks, called functional connectivity, in persons with dyslexia. Scientists have now conducted a whole-brain functional connectivity analysis of dyslexia using functional magnetic resonance imaging (fMRI).

From nose to knee: Engineered cartilage regenerates joints

Posted: 28 Aug 2014 06:02 AM PDT

Human articular cartilage defects can be treated with nasal septum cells. Researchers now report that cells taken from the nasal septum are able to adapt to the environment of the knee joint and can thus repair articular cartilage defects. The nasal cartilage cells' ability to self-renew and adapt to the joint environment is associated with the expression of so-called HOX genes.

Spot light on tailor-made multicyclic type of polymers

Posted: 27 Aug 2014 06:37 PM PDT

Scientists have synthesized multicyclic type of polymers for the first time offering insights for tailoring polymer properties as well as the mathematics of complex geometries.

Industrial management: Avoiding alarms

Posted: 27 Aug 2014 06:37 PM PDT

An intelligent system that predicts when alarms might be triggered could greatly improve the management of industrial plants.

Materials: Cubic cluster chills out

Posted: 27 Aug 2014 06:37 PM PDT

A gadolinium-based material that can be cooled by varying a magnetic field may be useful for cooling low-temperature sensors.