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All Top News -- ScienceDaily

Radar tracking reveals how bees develop a route between flowers
12/11/2017 07:07 AM
As bees gain foraging experience they continually refine both the order in which they visit flowers and the flight paths they take between flowers to generate better and better routes, according to researchers.

Reductions in individual plant growth sometimes boost community resilience
12/11/2017 07:07 AM
In sports, sometimes a player has to take one for the team. The same appears to be true in the plant world, where reduced individual growth can benefit the broader community.

Talking to ourselves and voices in our heads
12/08/2017 12:30 PM
As far our brain is concerned, talking to ourselves in our heads may be fundamentally the same as speaking our thoughts out loud, new research shows. The findings may have important implications for understanding why people with mental illnesses such as schizophrenia hear voices.

Sandy claws: Like holiday enthusiasts, majoid crabs decorate their shells
12/08/2017 12:30 PM
Majoid crabs -- known as decorator crabs -- adorn themselves with items secured from their surroundings such as sponges, algae and other marine debris. Scientists are exploring what factors drive this behavior.

Physicists excited by discovery of new form of matter, excitonium
12/08/2017 12:30 PM
Excitonium has a team of researchers ... well... excited! They have demonstrated the existence of an enigmatic new form of matter, which has perplexed scientists since it was first theorized almost 50 years ago.

Extreme fieldwork, climate modeling yields new insight into predicting Greenland's melt
12/08/2017 12:30 PM
A new study brings together scientists from land hydrology, glaciology and climate modeling to unravel a meltwater mystery. Researchers discovered that some meltwater from the lakes and rivers atop the region's glaciers, is being stored and trapped on top of the glacier inside a low-density, porous 'rotten ice.' This phenomenon affects climate model predictions of Greenland's meltwater.

Many more bacteria have electrically conducting filaments
12/08/2017 09:41 AM
The microbiologists who have discovered electrically conducting microfilaments or 'nanowires' in the bacterium Geobacter, announce in a new article that they have discovered the unexpected structures in many other species, greatly broadening the research field on electrically conducting filaments.

Galaxy orbits in the local supercluster
12/08/2017 07:55 AM
Astronomers have produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1,400 galaxies within 100 million light years of the Milky Way. The team reconstructed the galaxies' motions from 13 billion years in the past to the present day.

Insights on fast cockroaches can help teach robots to walk
12/08/2017 07:55 AM
Scientists show for the first time that fast insects can change their gait -- like a mammal's transition from trot to gallop. These new insights could contribute to making the locomotion of robots more energy efficient.

Life of an albatross: Tackling individuality in studies of populations
12/07/2017 04:25 PM
Ecologists commonly round off the individuality of individuals, treating animals of the same species, sex, and age like identical units. But individual differences can have demographic effects on interpretation of data at the scale of whole populations, if due to an underlying variability in individual quality, not chance. Researchers examined in the peculiarities that make some wandering albatrosses more successful than others.

Screen time before bed linked with less sleep, higher BMIs in kids
12/07/2017 04:25 PM
It may be tempting to let your kids stay up late playing games on their smartphones, but using digital devices before bed may contribute to sleep and nutrition problems in children, according to researchers.

'Obesity paradox' not found when measuring new cases of cardiovascular disease
12/07/2017 12:17 PM
Although obesity is a well-known risk factor for getting cardiovascular disease, a controversial body of research suggests that obesity may actually be associated with improved survival among people who have cardiovascular disease. However, a new study finds that the 'obesity paradox' is not present among people with new cases of cardiovascular disease.

Monkey feel, monkey do: Microstimulation in premotor cortex can instruct movement
12/07/2017 12:17 PM
Finding ways to get around those broken networks in the brain is an important area of research for those seeking to develop treatment interventions. Now researchers are showing in monkeys that stimulation delivered directly to the premotor cortex can elicit a feeling or experience that can instruct different movements, even when the stimulus is too small to induce any response directly.

CRISPR-Cas9 technique targeting epigenetics reverses disease in mice
12/07/2017 12:17 PM
Scientists report a modified CRISPR-Cas9 technique that alters the activity, rather than the underlying sequence, of disease-associated genes. The researchers demonstrate that this technique can be used in mice to treat several different diseases.

Heart monitors on wild narwhals reveal alarming responses to stress
12/07/2017 12:17 PM
Stress from human disturbances could cause behavioral responses in narwhals that are inconsistent with their physiological capacities, researchers say. They found that narwhals released after entanglement in nets and outfitted with heart monitors performed a series of deep dives, swimming hard to escape, while their heart rates dropped to unexpectedly low levels of three to four beats per minute.

Revising the story of the dispersal of modern humans across Eurasia
12/07/2017 12:17 PM
Most people are now familiar with the traditional 'Out of Africa' model: modern humans evolved in Africa and then dispersed across Asia and reached Australia in a single wave about 60,000 years ago. However, technological advances in DNA analysis and other fossil identification techniques, as well as an emphasis on multidisciplinary research, are revising this story. Recent discoveries show that humans left Africa multiple times prior to 60,000 years ago, and that they interbred with other hominins in many locations across Eurasia.

Crafty crows know what it takes to make a good tool
12/07/2017 12:17 PM
Biologists have discovered how New Caledonian crows make one of their most sophisticated tool designs -- sticks with a neatly shaped hooked tip. New Caledonian crows are the only species besides humans known to manufacture hooked tools in the wild. The study reveals how crows manage to fashion particularly efficient tools, with well-defined 'deep' hooks.

Black holes' magnetism surprisingly wimpy
12/07/2017 12:16 PM
Black holes are famous for their muscle: an intense gravitational pull known to gobble up entire stars and launch streams of matter into space at almost the speed of light. It turns out the reality may not live up to the hype.

Researchers establish long-sought source of ocean methane
12/07/2017 12:16 PM
A significant amount of the methane naturally released into the atmosphere comes from the ocean. This has long puzzled scientists because there are no known methane-producing organisms near the ocean's surface. A team of researchers has made a discovery that could help to answer this 'ocean methane paradox.'

It's all in the ears: Inner ears of extinct sea monsters mirror those of today's animals
12/07/2017 12:16 PM
A new study has revealed that an extinct group of marine reptiles called sauropterygians evolved similar inner ear proportions to those of some modern day aquatic reptiles and mammals.

Scientists create stretchable battery made entirely out of fabric
12/07/2017 09:49 AM
Scientists have developed an entirely textile-based, bacteria-powered bio-battery that could one day be integrated into wearable electronics.

Number of genetic markers linked to lifespan triples
12/07/2017 09:48 AM
Researchers have studied 389,166 volunteers who gave DNA samples to the UK Biobank, US Health and Retirement Study and the Wisconsin Longitudinal Study. In addition to confirming the eight genetic variants that had already been linked to longevity, this study found 17 more to expand the list of known variants affecting lifespan to 25 genes, with some sex-specific.

More than 1,000 ancient sealings discovered
12/07/2017 08:25 AM
Classical scholars have discovered a large number of sealings in southeast Turkey. More than 1,000 sealings give new insights into the Greco-Roman pantheon. The finds were in a late antique building complex point to a hitherto unknown church.

New species of extinct marsupial lion discovered in Australia
12/06/2017 05:37 PM
A team of Australian scientists has discovered a new species of marsupial lion which has been extinct for at least 19 million years. The findings are based on fossilized remains of the animal's skull, teeth, and humerus (upper arm bone) found in the Riversleigh World Heritage Area of remote northwestern Queensland.

Traumatic brain injury causes intestinal damage, study shows
12/06/2017 03:42 PM
A two-way link between traumatic brain injury and intestinal changes has been uncovered by research. These interactions may contribute to increased infections in these patients, and may also worsen chronic brain damage.

3-D mini brains accelerate research for repairing brain function
12/06/2017 02:23 PM
Hospitals are making mini brains from human stem cells, putting researchers on a fast track to repair the nervous system after injury or disease of the brain and spinal cord. Researchers have developed a new system to reduce the time it takes to grow these brain models, which will give them the ability to screen drugs and study what's behind disease-causing mutations more quickly.

Birth of a storm in the Arabian Sea validates climate model
12/06/2017 12:16 PM
Extreme cyclones that formed in the Arabian Sea for the first time in 2014 are the result of global warming and will likely increase in frequency, warn scientists. Their model showed that the burning of fossil fuels since 1860 would lead to an increase in the destructive storms in the Arabian Sea by 2015, marking one of the first times that modeled projections have synchronized with real observations of storm activity.

Unique field survey yields first big-picture view of deep-sea food webs
12/06/2017 12:16 PM
A new article documents the first comprehensive study of deep-sea food webs, using hundreds of video observations of animals caught in the act of feeding off the Central California coast. The study shows that deep-sea jellies are key predators, and provides new information on how deep-sea animals interact with life near the ocean surface.

Healthy mitochondria could stop Alzheimer's
12/06/2017 11:25 AM
Using a bioinformatics and experimental approach, scientists have found that rendering mitochondria resistant to damage can halt diseases caused by amyloid toxicity, such as Alzheimer's disease.

More-severe climate model predictions could be the most accurate
12/06/2017 11:22 AM
The climate models that project greater amounts of warming this century are the ones that best align with observations of the current climate, according to a article. Their findings suggest that the models used by the Intergovernmental Panel on Climate Change, on average, may be underestimating future warming.

Synchrotron sheds light on the amphibious lifestyle of a new raptorial dinosaur
12/06/2017 11:22 AM
A well-preserved dinosaur skeleton from Mongolia unites an unexpected combination of features that defines a new group of semi-aquatic predators related to Velociraptor. Detailed 3-D synchrotron analysis allowed an international team of researchers to present the bizarre 75-million-year-old predator, named Halszkaraptor escuilliei. The study not only describes a new genus and species of bird-like dinosaur that lived in Mongolia but also sheds light on an unexpected amphibious lifestyle for raptorial dinosaurs.

Clay minerals on Mars may have formed in primordial steam bath
12/06/2017 11:22 AM
New research suggests that the bulk of clay minerals on Mars could have been formed as the planet's crust cooled and solidified, not by later interactions with water on the surface as has long been assumed.

Living on thin air -- microbe mystery solved
12/06/2017 11:22 AM
Scientists have discovered that microbes in Antarctica have a previously unknown ability to scavenge hydrogen, carbon monoxide and carbon dioxide from the air to stay alive in the extreme conditions. The find has implications for the search for life on other planets, suggesting extraterrestrial microbes could also rely on trace atmospheric gases for survival.

ALMA finds massive primordial galaxies swimming in vast ocean of dark matter
12/06/2017 11:20 AM
New observations push back the epoch of massive-galaxy formation even further by identifying two giant galaxies seen when the universe was only 780 million years old, or about 5 percent its current age.

The world's smallest Mona Lisa
12/06/2017 11:20 AM
New techniques in DNA self-assembly allow researchers to create the largest to-date customizable patterns with nanometer precision on a budget.

Scientists observe supermassive black hole in infant universe
12/06/2017 11:19 AM
A team of astronomers has detected the most distant supermassive black hole ever observed. The black hole sits in the center of an ultrabright quasar and presents a puzzle as to how such a huge object could have grown so quickly.

Researchers 3-D print lifelike artificial organ models
12/06/2017 10:26 AM
A team of researchers has 3-D printed lifelike artificial organ models that mimic the exact anatomical structure, mechanical properties, and look and feel of real organs. These patient-specific organ models, which include integrated soft sensors, can be used for practice surgeries to improve surgical outcomes in thousands of patients worldwide.

Humans at maximum limits for height, lifespan and physical performance, study suggests
12/06/2017 10:25 AM
Newly emerging trends in data suggests humans may have reached their maximum limits for height, lifespan and physical performance. These biological limitations may be affected by anthropogenic impacts on the environment - including climate change - which could have a deleterious effect on these limits. This review is the first of its kind spanning 120 years worth of historical information, while considering the effects of both genetic and environmental parameters.

Separated since the dinosaurs, bamboo-eating lemurs, pandas share common gut microbes
12/06/2017 10:24 AM
A new study finds that bamboo lemurs, giant pandas and red pandas share 48 gut microbes in common -- despite the fact that they are separated by millions of years of evolution.

Viruses share genes with organisms across the tree of life, study finds
12/06/2017 10:24 AM
A new study finds that viruses share some genes exclusively with cells that are not their hosts. The study adds to the evidence that viruses swap genes with a variety of cellular organisms and are agents of diversity, researchers say.

How the oldest compound eyes were constructed
12/06/2017 08:01 AM
Researchers have discovered that the compound eyes of today's insects and crustaceans are still constructed in much the same way as they were in their extinct ancestors 500 million years ago. The research team looked at fossil trilobites. However, these arthropods lacked the lenses of contemporary compound eyes.

Litte Foot takes a bow
12/06/2017 08:01 AM
Little Foot is the only known virtually complete Australopithecus fossil discovered to date. It is by far the most complete skeleton of a human ancestor older than 1.5 million years ever found. It is also the oldest fossil hominid in southern Africa, dating back 3.67 million years. For the first time ever, the completely cleaned and reconstructed skeleton was viewed by the national and international media.

City air pollution cancels positive health effects of exercise in over 60's
12/06/2017 07:19 AM
Exposure to air pollution on city streets is enough to counter the beneficial health effects of exercise in older adults, according to new research.

Discovery about rare nitrogen molecules offers clues to makeup of life-supporting planets
12/06/2017 07:07 AM
A new study on atmospheric nitrogen provides a clue about what geochemical signatures of other planets might look like, especially if they are capable of supporting life as we know it.

Recently discovered fossil shows transition of a reptile from life on land to life in the sea
12/06/2017 07:07 AM
Using modern research tools on a 155-million-year-old reptile fossil, scientists report they have filled in some important clues to the evolution of animals that once roamed land and transitioned to life in the water.

New approach measures early human butchering practices
12/06/2017 07:05 AM
Researchers have found that statistical methods and 3-D imaging can be used to accurately measure animal bone cut marks made by prehistoric human butchery, and to help answer pressing questions about human evolution.

Tigers cling to survival in Sumatra's increasingly fragmented forests
12/05/2017 03:02 PM
A research expedition tracked endangered tigers through the Sumatran jungles for a year and found tigers are clinging to survival in low density populations. The study found that well-protected forests are disappearing and are increasingly fragmented: Of the habitat tigers rely on in Sumatra, 17 percent was deforested between 2000 to 2012 alone. Their findings have renewed fears about the possible extinction of the elusive predators.

Engineers 3-D print a 'living tattoo'
12/05/2017 11:01 AM
Engineers have devised a 3-D printing technique that uses a new kind of ink made from genetically programmed living cells. The cells are engineered to light up in response to a variety of stimuli. When mixed with a slurry of hydrogel and nutrients, the cells can be printed, layer by layer, to form three-dimensional, interactive structures and devices.

Experiment demonstrates quantum mechanical effects from biological system
12/05/2017 11:01 AM
Using green fluorescent proteins obtained from Escherichia coli, researchers have demonstrated quantum mechanical effects from a biological system.

Obesity prevented in mice fed high-fat diet
12/05/2017 09:59 AM
Researchers activated the Hedgehog protein pathway in the fat cells of mice. After eight weeks of eating a high-fat diet, mice that had been engineered with genes to activate the pathway didn't gain weight, but control animals whose Hedgehog pathways were not activated became obese.