From: Newsletter Phys.org <not-for-reply@physorg.com>
Date: Tue, Aug 4, 2015 at 3:41 AM
Subject: Science X Newsletter Monday, Aug 3
To: Pascal Alter <pascal.alter@gmail.com>
Dear Pascal Alter,
Here is your customized Phys.org Newsletter for August 3, 2015:
Spotlight Stories Headlines
- For faster battery charging, try a quantum battery?- Sundew discovery on Facebook makes plant science news
- Best of Last Week – A blow for supersymmetry, a saltwater lamp and sleep found to make memories more accessible
- Caterpillar chemical turns ants into bodyguards
- Researchers investigate increased ocean acidification
- Quantitative measurement of oxygen affinity in a single red blood cell
- Study calculates the speed of ice formation
- Scientists bring order, and color, to microparticles
- What would the world look like to someone with a bionic eye?
- Archaeologists uncover entrance gate and fortification of Biblical city
- Magnetism at nanoscale
- 4 million years at Africa's salad bar
- Septic tanks aren't keeping poo out of rivers and lakes
- Ocean changes are affecting salmon biodiversity and survival
- How the finch changes its tune
Nanotechnology news
Researches demystify the ferroelectric properties observed in hafnium-oxide-based thin filmsFerroelectric materials have applications in next-generation electronics devices from optoelectronic modulators and random access memory to piezoelectric transducers and tunnel junctions. Now researchers at Tokyo Institute of Technology report insights into the properties of epitaxial hafnium-oxide-based (HfO2-based) thin films, confirming a stable ferroelectric phase up to 450 °C. As they point out, "This temperature is sufficiently high for HfO2-based ferroelectric materials to be used in stable device operation and processing as this temperature is comparable to those of other conventional ferroelectric materials." | |
Proving nanoparticles in sunscreen productsLoads of cosmetics like sunscreen lotions contain titanium dioxide. These nanoparticles are contentious. Experts suspect they may have harmful effects on people and the environment. But it is difficult to prove that the particles are in the lotions. Using a method developed by Fraunhofer researchers, the particles can now be calculated. | |
Nanoparticles used to breach mucus barrier in lungsNanotechnology could one day provide an inhaled vehicle to deliver targeted therapeutic genes for those suffering from life-threatening lung disorders. Researchers may have discovered first gene delivery system that efficiently penetrates the hard-to-breach human airway mucus barrier of lung tissue. |
Physics news
For faster battery charging, try a quantum battery?(Phys.org)—Physicists have shown that a quantum battery—basically, a quantum system such as a qubit that stores energy in its quantum states—can theoretically be charged at a faster rate than conventional batteries. This "quantum speedup" arises from quantum entanglement among multiple qubits, which essentially provides a shortcut between the qubits' uncharged and charged states, allowing for faster charging. | |
New mechanism discovered for controlling ultracold chemical reactionsResearchers have discovered a new interference mechanism in ultracold chemical reactions, one which has important technological applications in precision measurements, sensing and quantum computing. | |
Quantum states in a nano-object manipulated using a mechanical systemScientists at the Swiss Nanoscience Institute at the University of Basel have used resonators made from single-crystalline diamonds to develop a novel device in which a quantum system is integrated into a mechanical oscillating system. For the first time, the researchers were able to show that this mechanical system can be used to coherently manipulate an electron spin embedded in the resonator - without external antennas or complex microelectronic structures. The results of this experimental study will be published in Nature Physics. | |
Scientists bring order, and color, to microparticlesA team of New York University scientists has developed a technique that prompts microparticles to form ordered structures in a variety of materials. The advance, which appears in the Journal of the American Chemical Society (JACS) as an "Editors' Choice" article, offers a method to potentially improve the makeup and color of optical materials used in computer screens along with other consumer products. | |
Study calculates the speed of ice formationResearchers at Princeton University have for the first time directly calculated the rate at which water crystallizes into ice in a realistic computer model of water molecules. The simulations, which were carried out on supercomputers, provide insight into the mechanism by which water transitions from a liquid to a crystalline solid. | |
Small tilt in magnets makes them viable memory chipsUniversity of California, Berkeley, researchers have discovered a new way to switch the polarization of nanomagnets, paving the way for high-density storage to move from hard disks onto integrated circuits. | |
Magnetism at nanoscaleAs the demand grows for ever smaller, smarter electronics, so does the demand for understanding materials' behavior at ever smaller scales. Physicists at the U.S. Department of Energy's Ames Laboratory are building a unique optical magnetometer to probe magnetism at the nano- and mesoscale. | |
Scientists propose an explanation for puzzling electron heat loss in fusion plasmasCreating controlled fusion energy entails many challenges, but one of the most basic is heating plasma – hot gas composed of electrons and charged atoms – to extremely high temperatures and then maintaining those temperatures. Now scientist Elena Belova of the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) and a team of collaborators have proposed an explanation for why the hot plasma within fusion facilities called tokamaks sometimes fails to reach the required temperature, even as researchers pump beams of fast-moving neutral atoms into the plasma in an effort to make it hotter. |
Earth news
Researchers investigate increased ocean acidificationThe primary cause of global ocean acidification is the oceanic absorption of CO2 from the atmosphere. Although this absorption helps to mitigate some of the effects of anthropogenic climate change, it has resulted in a reduction of oceanic pH levels, with its own set of environmental consequences. Coral bleaching, algae loss, and decreasing oceanic oxygen levels are all attributable to the reduced pH of the oceans. Additionally, acidification poses a threat to human industry with projected declines in commercial fisheries, the breakdown of food webs, and a decline in tourism as ocean ecosystems and the natural environment suffer degradation. The current pace of acidification is greater and faster than at any time in the last 300 million years, and bears close scrutiny. | |
'Snowball earth' might be slushyImagine a world without liquid water—just solid ice in all directions. It would certainly not be a place that most life forms would like to live. | |
CO2 removal cannot save the oceans—if we pursue business as usualGreenhouse-gas emissions from human activities do not only cause rapid warming of the seas, but also ocean acidification at an unprecedented rate. Artificial carbon dioxide removal (CDR) from the atmosphere has been proposed to reduce both risks to marine life. A new study based on computer calculations now shows that this strategy would not work if applied too late. CDR cannot compensate for soaring business-as-usual emissions throughout the century and beyond, even if the atmospheric carbon dioxide (CO2) concentration would be restored to pre-industrial levels at some point in the future. This is due to the tremendous inertia of the ocean system. Thus, CDR cannot substitute timely emissions reductions, yet may play a role as a supporting actor in the climate drama. | |
Septic tanks aren't keeping poo out of rivers and lakesThe notion that septic tanks prevent fecal bacteria from seeping into rivers and lakes simply doesn't hold water, says a new Michigan State University study. | |
Glaciers melt faster than everThe World Glacier Monitoring Service, domiciled at the University of Zurich, has compiled worldwide data on glacier changes for more than 120 years. Together with its National Correspondents in more than 30 countries, the international service just published a new comprehensive analysis of global glacier changes in the Journal of Glaciology. In this study, observations of the first decade of the 21st century (2001-2010) were compared to all available earlier data from in-situ, air-borne, and satellite-borne observations as well as to reconstructions from pictorial and written sources. | |
Greener but not cleaner? How trees can worsen urban air pollutionNo one enjoys choking on smog, but are more trees really the answer for polluted city air? It's not as clear-cut as you might think. Air pollution is clearly a problem for health and well-being – and as more and more people across the world move to live in megacities, they could miss out on the fresh air associated with the green countryside. | |
Expedition to unravel coastal seafloor's ancient secretsInternational scientists who set sail from Fremantle today will use cutting edge technologies to peer 5 million years into the past to find clues about our future climate. | |
Earthquake early warning system moves closer to realityThe West Coast earthquake early warning system moved a step closer to reality this week as the U.S. Geological Survey awarded $4 million to the University of California, Berkeley, and three other universities to turn the current demonstration system, called ShakeAlert, into a robust prototype that can be used broadly by cities, industries, utilities and transportation networks in California, Oregon and Washington. | |
Could deep-Earth microbes help us frack for oil?On a muddy hill above a World War II ordnance plant that made material for atomic bombs, a fracking crew will drill thousands of feet underground in a search for life itself. | |
Researchers confront weather extremes through infrastructure resiliencySouth Florida's predisposition to weather extremes renders the region's infrastructure acutely vulnerable. But weather extremes are not exclusive to South Florida. The Urban Resilience to Extreme Weather-Related Events Sustainability Research Network (UREx SRN), a newly formed team of researchers, is addressing these challenges on an international scale. FIU biologists Evelyn Gaiser, John Kominoski and Tiffany Troxler are part of the 50-member team of researchers. | |
Obama says climate one of 'key challenges' of our timePresident Barack Obama described climate change as one of the key challenges of our time Monday as he announced the first ever limits on US power plant emissions. | |
EU hails Obama clean power plan as 'genuine' effort to cut emissionsThe EU on Monday hailed US President Barack Obama's clean power plan as "a positive step" to cut carbon emissions ahead of a global climate summit in Paris. | |
NASA sees heavy rainfall in Super Typhoon SoudelorTyphoon Soudelor grew into a Super typhoon today, Aug. 3, 2015, as the GPM core satellite passed overhead and determined where the heaviest rainfall was occurring in the powerful storm. | |
NASA's RapidScat sees Hurricane Guillermo's strongest winds on western sideAs Hurricane Guillermo continued moving toward the Hawaiian Islands, NASA's RapidScat instrument that flies aboard the International Space Station analyzed its surface winds. RapidScat found the strongest winds were on the western side of the storm facing the Hawaiian Islands and helping generate rough surf along eastern-facing shores. |
Astronomy & Space news
T-minus 12 days to perihelion, Rosetta's comet up close and in 3DWith just 12 days before Comet 67P/Churyumov-Gerasimenko reaches perihelion, we get a look at recent images and results released by the European Space Agency from the Philae lander along with spectacular 3D photos from Rosetta's high resolution camera. | |
Space probes: sterile launch into outer spaceComponents used on a space mission must be cleaned meticulously. Fraunhofer researchers designed a cleanroom for the ESA (European Space Agency) in which the most infinitesimal contaminants can be removed. These experts, together with partners, are sterilizing ESA's "ExoMars" Mars rover, scheduled for launch in 2018. | |
The Planet SaturnThe farthest planet from the Sun that be observed with the naked eye, the existence of Saturn has been known for thousands of years. And much like all celestial bodies that can be observed with the aid of instruments – i.e. Mercury, Venus, Mars, Jupiter and the Moon – it has played an important role in the mythology and astrological systems of many cultures. | |
Curiosity discovers Mars rock like none before, sets drill campaignOn the eve of the 3rd anniversary since her nail biting touchdown inside Gale Crater, NASA's car sized Curiosity Mars Science Laboratory (MSL) rover has discovered a new type of Martian rock that's surprisingly rich in silica – and unlike any other targets found before. | |
An orange a day keeps scurvy awayCenturies ago, ships often sailed with crews numbering in the hundreds returning with tens. Cause of death: Scurvy - a severe depletion of Vitamin C. Today's explorers cross miles of space with no hope of finding an island with food and nutrients along the way. All nutritional needs must be met aboard. |
Technology news
Cutting costs in aircraft turbine productionCompressor disks for aircraft turbines are milled from a single piece of material. During processing, the blades begin to vibrate. Now, a novel clamping system boosts vibration absorption for the blades by more than 400 times, and cuts manufacturing costs by as much as 5000 euros. | |
A flexible solution for secure IT in carsToday, almost everything in your car is managed by an electronic control unit (ECU). The problem is that these minicomputers are increasingly coming under attack. Fraunhofer researchers have now developed a platform that makes it possible to flexibly install secure devices in a way that is based on open and vendor-neutral hardware and software standards. | |
Heating with the sunSolar-Active-Houses heat themselves using heat collectors and water tanks. However, no one had conducted an objective assessment of how efficiently they do so. Fraunhofer researchers put some of these solar houses to the test, identified where there was room for improvement and laid the scientific groundwork for this housing concept. | |
Smart driver seat that responds to gesturesA multitude of professional drivers suffer from back problems. One cause: driver seats that are inadequately adjusted to each driver's ergonomic needs. Fraunhofer's researchers, in joint collaboration with Isringhausen GmbH & Co. KG, engineered a driver's seat whose shape and position can be adjusted by using simple hand gestures. | |
AI researchers should not retreat from battlefield robots, they should engage them head-onThere are now over 2,400 artificial intelligence (AI) and robotics researchers who have signed an open letter calling for autonomous weapons – often dubbed "killer robots" – to be banned. | |
Up next: video-on-demand shakes up the television industryTelstra last week announced that it will launch Telstra TV in September. This could be the "all-in-one" video streaming service many Australians have craved, bundling together the three leading video-on-demand (VoD) services: Netflix, Stan and Presto. | |
People should have the 'right to wipe' youthful online indiscretionsThere was a time before Facebook and social media and text messaging. But for the current and subsequent generations they're already here, whether or not they're aware of them. Inevitably this can lead to ill thought-out or regrettable public posts. It's said that "the internet is forever", but a campaign that has garnered ministerial backing aims to give those reaching adulthood a second chance. | |
Climate change means we can't keep living in glass housesHow do we go about designing buildings today for tomorrow's weather? As the world warms and extreme weather becomes more common, sustainable architecture is likely to mean one major casualty: glass. | |
Cybathlon practice session a successSlicing bread in the morning, pouring a cup of coffee and sitting down at the kitchen table are a part of everyday life for most people. But for people with physical impairments such as amputated limbs, the tasks so many of us take for granted are anything but a matter of course - and they are often difficult to accomplish without help. According to the World Health Organisation (WHO), around 15% of the world's population is physically impaired to some degree. In order to overcome the hurdles of everyday life, many disabled people use assistive technologies. This is where the Cybathlon comes in: it aims to drive forward the development of these technologies in a fun and competitive environment. | |
ICANN posts proposal to end US oversight of InternetThe overseers of the Internet on Monday published a keenly anticipated proposal to step out from under US oversight. | |
Internet accessibility an important factor in government transparencyPublic affairs experts say easy and constant access by citizens to important government information, referred to as government transparency, is vital for good governance as well as the perception by citizens that the government is trustworthy. | |
Apple pushed down to 3rd in China smartphones for Q2Two Chinese smartphone makers pushed US technology giant Apple into third place in the world's biggest market in the second quarter, an independent analyst firm said Monday. | |
AT&T, as new owner of DirecTV, offers TV-wireless discountAT&T customers will save $10 a month and get a single bill for their TV and wireless services under a new package the company is offering after its $48.5 billion purchase of satellite TV company DirecTV 10 days ago. | |
German automakers buying Nokia's HERE map businessA consortium of German automakers Audi, BMW and Daimler announced Monday it is buying Nokia Corp.'s HERE map business in a deal that values the unit at 2.8 billion euros ($3.1 billion) and secures their access to technology that could eventually be used for driverless cars. | |
Saving energy in industrial parks: new online tool helps economic developers and climate-protection managersNew energy-saving concepts for industrial parks have been developed by a team of RUB engineers headed by Prof Dr-Ing. Hermann-Josef Wagner from the Chair of Energy Systems and Energy Economics on behalf of the Federal Ministry of the Environment. Collaborating with partners under the umbrella of the "GET.Min" project, they have analysed four industrial zones to test in what way enterprises in an estate can benefit from each other. Based on those data, the team developed a web tool which interested parties can use to determine energy-saving potentials. "This check is the first one of its kind in Germany, and the first instrument that gives an overview over energy consumption in industrial estates," says Wagner. | |
India orders telecoms to block more than 850 adult websitesIndia has ordered Internet service providers to block access to more than 850 adult websites in what the government has described as a way to protect social decency. | |
Indiana medical software company hack affected 3.9M peopleAn Indiana medical software company has reported the private information of 3.9 million people nationwide was exposed when its networks were hacked earlier this year, the U.S. Department of Health and Human Services said Monday. | |
Microsoft buys firm that boosts sales through gamesMicrosoft announced on Monday that it has bought a startup with a winning way of using game play to boost the performance of sales teams. |
Chemistry news
Video: Can we save the strawberries?Strawberries are sweet, juicy and delightful. Unfortunately, an expiring federal pesticide exemption could mean 2016 will be the end of strawberries in the U.S. How can we protect our strawberries from pests and comply with federal fumigant standards? In this Speaking of Chemistry video, Sophia Cai explains the problem and some possible solutions. |
Biology news
Caterpillar chemical turns ants into bodyguardsA trio of researchers with Kobe University in Japan has found that lycaenid butterfly caterpillars of the Japanese oakblue variety, have dorsal nectary organ secretions that cause ants that eat the material to abandon their fellow ants to instead hang out with and defend the caterpillar against enemies. In their paper published in the journal Current Biology, Masaru Hojo, Naomi Pierce and Kazuki Tsuji describe their research into the relationship between the two creatures and why they believe the nature of that relationship needs to be reclassified. | |
Sundew discovery on Facebook makes plant science newsA new species of sundew has been discovered on Facebook. The find is a carnivorous sundew, Drosera magnifica. The new discovery comes from a single mountaintop in southeastern Brazil—the largest New World sundew. | |
New lizard named after Sir David AttenboroughA research team led by Dr Martin Whiting from the Department of Biological Sciences recently discovered a beautifully coloured new species of flat lizard, which they have named Platysaurus attenboroughi, after Sir David Attenborough. | |
A look at living cells down to individual moleculesEPFL scientists have been able to produce footage of the evolution of living cells at a nanoscale resolution by combining atomic force microscopy and an a super resolution optical imaging system that follows molecules that have been made to blink. | |
New method reveals hidden population of regulatory molecules in cellsA recently discovered family of small RNA molecules, some of which have been implicated in cancer progression, has just gotten much larger thanks to a new RNA sequencing technique developed by researchers at UC Santa Cruz. | |
Ocean changes are affecting salmon biodiversity and survivalThe biodiversity of two Northern Pacific salmon species may be at risk due to changes in ocean conditions at the equator, reports a study by the University of California, Davis. | |
4 million years at Africa's salad barAs grasses grew more common in Africa, most major mammal groups tried grazing on them at times during the past 4 million years, but some of the animals went extinct or switched back to browsing on trees and shrubs, according to a study led by the University of Utah. | |
How the finch changes its tuneLike top musicians, songbirds train from a young age to weed out errors and trim variability from their songs, ultimately becoming consistent and reliable performers. But as with human musicians, even the best are not machines. To learn and improve, the songbird brain needs to shake up its tried-and-true patterns with a healthy dose of creative experimentation. Until now, no one has found a specific mechanism by which this could occur. | |
An ally for the understudied Y chromosomeAlexander Godfrey, a PhD student in biology at MIT, is acutely fascinated by the Y chromosome, which confers maleness. This chromosome is often considered a genetic castaway—because its complexity makes it very difficult to study—but Godfrey is undeterred. Four years into his degree, he continues to push forward, attempting to get to know a chromosome that 50 percent of the population has, but few understand. | |
Rutgers tomato reinvented with even more flavorA new tomato that combines the nostalgia-inducing flavor of an heirloom with the durability of supermarket varieties is Rutgers' answer to anyone who wonders what happened to the flavorful Jersey tomatoes of the past. | |
Whale shark project lets students dive into genetic researchBiology undergraduates at Emory are studying genetics in a big way: They are the first to take a crack at researching the raw data from the sequence of the genome of the whale shark, the world's largest fish. | |
Scientist proposes new approach for conserving speciesWhile worldwide, land managers and conservationists are evaluating methods for preserving species, Paul Beier, a Regents' professor who researches wildlife ecology and conservation biology at NAU, believes one approach has the highest likelihood of success. | |
Researchers identify protein crucial for stem cell survival using editing tool CRISPRIn a multidisciplinary effort, a team of University of Wisconsin-Madison engineers has identified a protein that is integral to the survival and self-renewal processes of human pluripotent stem cells (hPSC). | |
NYSCF Global Stem Cell Array brings precision medicine one step closer to the clinicScientists at The New York Stem Cell Foundation (NYSCF) Research Institute successfully designed a revolutionary, high-throughput, robotic platform that automates and standardizes the process of transforming patient samples into stem cells. This unique platform, the NYSCF Global Stem Cell Array, for the first time gives researchers the scale to look at diverse populations to better understand the underlying causes of disease and create new individually tailored treatments, enabling precision medicine in patient care. | |
Shifting winds, ocean currents doubled endangered Galápagos penguin populationShifts in trade winds and ocean currents powered a resurgence of endangered Galápagos penguins over the past 30 years, according to a new study. These changes enlarged a cold pool of water the penguins rely on for food and breeding - an expansion that could continue as the climate changes over the coming decades, the study's authors said. | |
Where commerce & conservation clash: Bushmeat trade grows with economy in 13-year studyThe bushmeat market in the city of Malabo is bustling—more so today than it was nearly two decades ago, when Gail Hearn, PhD, began what is now one of the region's longest continuously running studies of commercial hunting activity. At the peak of recorded activity in 2010, on any given day more than 30 freshly killed primates, such as Bioko red-eared monkeys and drills, were brought to market and sold to shoppers seeking such high-priced delicacies. | |
Delta Air Lines bans big game trophy shipmentsIn the wake of the scandal over the killing of Cecil the lion in Zimbabwe, US airline Delta on Monday banned the shipment of big game trophies on its flights. |
Medicine & Health news
Quantitative measurement of oxygen affinity in a single red blood cellResearchers report a system that quantitatively measures cell volume, hemoglobin mass, and oxygen saturation in individual red blood cells. They found that oxygen affinity is different for individual red blood cells. These differences are likely due to the cellular environment rather than hemoglobin concentration. | |
How the brain inhibits distractions during goal-directed behaviorExercising goal-directed behavior in the presence of distracting stimuli—for instance, reading a journal-published study amid the crash of surf, the laughter of children, and the crush of beachgoers at a coastal resort on a sunny afternoon—requires the ability to inhibit distracting stimuli. This ability is important in many life settings, including school and work, and is an important pillar of psychological well-being. | |
Study describes red meat's cancer-causing mechanism in the colonOver the past 40 years, red meat has changed roles in the American diet from a supporting player to the main attraction, increasing in both portion size and frequency of consumption. The rise in diagnoses of colorectal cancer correlates with this increase, though the mechanism by which red meat consumption results in hyperplasia is not well understood. Now a group of researchers in the Netherlands have published a study that suggests the gut microbiota, a hot subject among biomedical researchers, is pivotal in the heme-induced epithelial damage that leads to hyperplasia. They have published their results in the Proceedings of the National Academy of Sciences. | |
Character traits outweigh material benefits in assessing value others bring usWhen it comes to making decisions involving others, the impression we have of their character weighs more heavily than do our assessments of how they can benefit us, a team of New York University researchers has found. | |
Study reveals new insight into DNA repairDNA double-strand breaks (DSBs) are the worst possible form of genetic malfunction that can cause cancer and resistance to therapy. New information published this week reveals more about why this occurs and how these breaks can be repaired. | |
Trouble spot in brain linked to learning difficulties in Down syndrome identifiedNew brain research has mapped a key trouble spot likely to contribute to intellectual disability in Down syndrome. In a paper published in Nature Neuroscience, scientists from the University of Bristol and UCL suggest the findings could be used to inform future therapies which normalise the function of disrupted brain networks in the condition. | |
Muscle fibers grown in the lab offer new model for studying muscular dystrophySkeletal muscle is one of the most abundant tissue types in the human body, but has proven difficult to produce in large quantities in the lab. Unlike other cell types, such as heart cells, neurons and cells found in the gut, previous attempts to efficiently and accurately derive muscle cells from pre-cursor cells or culture have not been fruitful. In a new study published this week in Nature Biotechnology, investigators from Brigham and Women's Hospital (BWH) report that by identifying and mimicking important developmental cues, they have been able to drive cells to grow into muscle fibers, producing millimeter-long muscle fibers capable of contracting in a dish and multiplying in large numbers. This new method of producing muscle cells could offer a better model for studying muscle diseases, such as muscular dystrophy, and for testing out potential treatment options. | |
New insight into how the immune system sounds the alarmT cells are the guardians of our bodies: they constantly search for harmful invaders and diseased cells, ready to swarm and kill off any threats. A better understanding of these watchful sentries could allow scientists to boost the immune response against evasive dangers (e.g., cancer or infections), or to silence it when it mistakenly attacks the body itself (e.g., autoimmune disorders or allergies). | |
Fly brains filter out visual information caused by their own movements, like humansOur brains are constantly barraged with sensory information, but have an amazing ability to filter out just what they need to understand what's going on around us. For instance, if you stand perfectly still in a room, and that room rotates around you, it's terrifying. But stand still in a room and turn your eyes, and the same visual input feels perfectly normal. That's thanks to a complex process in our brain that tell us when and how to pay attention to sensory input. Specifically, we ignore visual input caused by our own eye movements. | |
What would the world look like to someone with a bionic eye?Various sight recovery therapies are being developed by companies around the world, offering new hope for people who are blind. But little is known about what the world will look like to patients who undergo those procedures. | |
How language gives your brain a breakHere's a quick task: Take a look at the sentences below and decide which is the most effective. (1) "John threw out the old trash sitting in the kitchen." (2) "John threw the old trash sitting in the kitchen out." | |
It's all connected: Daily changes in mouse gut bacteria moves with internal clock, genderBy now, the old saw, "You are what you eat," has been well-used in describing the microbiome. However axiomatic that phrase may be, a new study has also found that who and when that consumption is done can affect microbiome make-up. Changes in the abundance of mouse gut bacteria, over a 24-hour cycle, particularly in females, is tied to rhythms in the internal clock, according to work published online this week in the Early Edition of the Proceedings of the National Academy of Science, by researchers from the Perelman School of Medicine at the University of Pennsylvania. | |
Surprising results casts new light on the free radical theory of agingWhen scientists in the Campisi lab at the Buck Institute bred mice that produced excess free radicals that damaged the mitochondria in their skin, they expected to see accelerated aging across the mouse lifespan - additional proof of the free radical theory of aging. Instead, they saw a surprising benefit in young animals: accelerated wound healing due to increased epidermal differentiation and re-epithelialization. The study published online on August 3rd in Proceedings of the National Academy of Sciences. | |
Even moderate picky eating can have negative effects on children's healthPicky eating among children is a common but burdensome problem that can result in poor nutrition for kids, family conflict, and frustrated parents. | |
If you're using drugs, scientists want to help you avoid addictionAbstinence is the best way to avoid drug addiction. But in many societies, drug use is the norm, not the exception, especially by youth. What keeps the majority of users from becoming addicted? How drugs are taken has something to do with it, according to pharmacology researchers at the University of Montreal. "Why do some drug users become addicts? The amount of drugs they take over time is one factor, but the speed with which the substance enters and exits the brain can be just as important," explained Professor Anne-Noël Samaha, who supervised the study into how pharmacokinetic factors govern addiction. | |
Researchers investigate effect of environmental epigenetics on disease and evolutionWashington State University researchers say environmental factors are having an underappreciated effect on the course of disease and evolution by prompting genetic mutations through epigenetics, a process by which genes are turned on and off independent of an organism's DNA sequence. | |
Urine test for early stage pancreatic cancer possible after biomarker discoveryA combination of three proteins found at high levels in urine can accurately detect early-stage pancreatic cancer, UK researchers have found. The discovery could lead to a non-invasive, inexpensive test to screen people at high risk of developing the disease. | |
Want to boost your toddler's development? Put a toy chicken on your head!Parents who joke and pretend with their children are teaching them important life skills, research by the University of Sheffield has revealed. | |
Fighting cancer head-onHead and neck cancers are the sixth most common malignancies worldwide. Yet few are diagnosed before stage 3 or 4, when the cancer has already spread to the lymph nodes or beyond. New research is helping scientists better understand these cancers and pave the way for therapies that could improve diagnosis and treatment. | |
Free program helps couples identify emotional 'hot buttons'QUT psychology researcher Katherine De Maria is looking for volunteer couples to help her investigate ways in which people's emotional intelligence can be enhanced to improve their ability to communicate with their intimate partner. | |
Alternative therapies for menopausal women – a poor alternative?New research from Monash University's School of Public Health and Preventive Medicine has found that nearly half a million Australian women aged 40-65 years could be using complementary and alternative medicines (CAMs) for menopausal symptoms, despite little evidence of their effectiveness and potential side-effects. | |
Scientists explain underlying cause of unhealthy brain aging associated with Alzheimer'sDoctors commonly recommend patients increase their intake of calcium as a means of combating osteoporosis for aging bones. | |
Canadian study sheds surprising light on the causes of cerebral palsyCerebral palsy (CP) is the most common cause of physical disability in children. It has historically been considered to be caused by factors such as birth asphyxia, stroke and infections in the developing brain of babies. In a new game-changing Canadian study, a research team from The Hospital for Sick Children (SickKids) and the Research Institute of the McGill University Health Centre (RI-MUHC) has uncovered strong evidence for genetic causes of cerebral palsy that turns experts' understanding of the condition on its head. | |
Common medications for dementia could cause harmful weight lossMedications commonly used to treat dementia could result in harmful weight loss, according to UC San Francisco researchers, and clinicians need to account for this risk when prescribing these drugs to older adults, they said. | |
Diagnosing heart conditions by smartphoneIn collaboration with an international scientific project team, a Simon Fraser University doctoral student is paving the way for us to be able to one day diagnose heart conditions using our smartphones. | |
Brain teaser: 3-D printed 'tissue' to help combat diseaseThe brain is amazingly complex, with around 86 billion nerve cells. The challenge for researchers to create bench-top brain tissue from which they can learn about how the brain functions, is an extremely difficult one. | |
Combination therapy may be more effective against the most common ovarian cancerHigh-grade serous ovarian cancer often responds well to the chemotherapy drug carboplatin, but why it so frequently comes back after treatment has been a medical mystery. | |
Dementia patients, caregivers prefer better care, support over research for Alzheimer's cureMore than $100 million in federal funding was spent last year toward searching for a cure for Alzheimer's disease. However, if given the choice, most people with dementia and those caring for them would like to see the money go elsewhere, according to a recent study led by University at Buffalo researcher Davina Porock. | |
Engineered clotting protein stops bleeding in most common inherited bleeding disorderThe first protein engineered to help control bleeding episodes in patients with severe von Willebrand disease (vW disease) has been shown to be safe and effective, according to results of a Phase III trial. Study data were published online today in Blood, the Journal of the American Society of Hematology | |
New survey to distinguishing between expectable vs. worrisome early childhood misbehaviorResearchers at Northwestern University are using a novel dimensional method for distinguishing misbehavior that is expectable in early childhood versus that which is cause for clinical concern. Their study is published in the August 2015 issue of the Journal of the American Academy of Child and Adolescent Psychiatry. | |
Molecular spies to fight cancerScientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), in cooperation with colleagues at the University of Zurich and the Ruhr-Universität Bochum, have for the first time successfully tested a new tumor diagnosis method under near-real conditions. The new method first sends out an antibody as a "spy" to detect the diseased cells and then binds to them. This antibody in turn attracts a subsequently administered radioactively labeled probe. The scientists could then clearly visualize the tumor by utilizing a tomographic method. This procedure could improve cancer treatment in the future by using internal radiation. | |
Researchers to monitor resistance to HIV drugs in AfricaInfectious diseases researchers from the University of Pittsburgh School of Medicine are leading a five-year, $5 million initiative to monitor drug resistance during the rollout of HIV prevention drugs in sub-Saharan Africa. | |
Big data collaboration to improve chronic disease managementDuke-NUS Graduate Medical School Singapore (Duke-NUS) and Holmusk, a global tele-health platform, have recently announced a collaboration to further the potential of big data in healthcare. Big data refers to very large, unstructured and diverse datasets that cannot be managed using conventional methods. In healthcare, big data and analytics allow us to discover patterns that would not be found otherwise, and make predictions about disease. This has the potential to improve care and lower costs. | |
Stress responder is a first responder in helping repair DNA damage and avoiding cancerDNA damage increases the risk of cancer, and researchers have found that a protein, known to rally when cells get stressed, plays a critical, early step in its repair. | |
Researcher discovers trigger of deadly melanomaSkin cancer is the most common of all cancers, and melanoma, which accounts for 2% of skin cancer cases, is responsible for nearly all skin cancer deaths. Melanoma rates in the US have been rising rapidly over the last 30 years, and although scientists have managed to identify key risk factors, melanoma's modus operandi has eluded the world of medical research. | |
Yo-yo dieting not associated with increased cancer riskThe first comprehensive study of its kind finds weight cycling, repeated cycles of intentional weight loss followed by regain, was not associated with overall risk of cancer in men or women. The study by American Cancer Society investigators is the largest to date to investigate weight cycling with cancer risk. It appears early online in the American Journal of Epidemiology. | |
Potential new therapy approaches to reverse kidney damage identifiedAdults who are worried or terrified sometimes curl up into a fetal position. Likewise, adult cells that are injured, including genetic injury leading to cancer, initiate a process that was present during embryonic development. | |
Further evidence of genetic key to deadliest form of skin cancerScientists from the University of Leeds have uncovered further evidence that the protective buffers at the ends of chromosomes - known as telomeres - are fundamental to the understanding of the deadliest form of skin cancer, melanoma. | |
When farm to table means crossing international bordersWith Congress currently debating the repeal of mandatory country-of-origin labeling (COOL) for meat and poultry - federal law in the US since 2002 - new research from the Sam W. Walton College of Business at the University of Arkansas shines a spotlight on how COOL labeling affects consumers' purchase decisions. | |
Cattle movement estimation study sheds light on disease riskA new technique developed by a Kansas State University researcher helps estimate the movement of beef cattle to determine the risk of disease. | |
Vaccine with virus-like nanoparticles effective treatment for RSV, study findsA vaccine containing virus-like nanoparticles, or microscopic, genetically engineered particles, is an effective treatment for respiratory syncytial virus (RSV), according to researchers at Georgia State University. | |
Engineering a better 'do: Researchers are learning howUsing heat to style curly hair poses a nagging problem: applying too much causes permanent damage resulting in limp fibers devoid of natural curve. | |
High-dose vitamin D supplementation not associated with benefits for postmenopausal womenHigh-dose vitamin D supplementation in postmenopausal women was not associated with beneficial effects on bone mineral density, muscle function, muscle mass or falls, according to the results of a randomized clinical trial published online by JAMA Internal Medicine. | |
The uneasy, unbreakable link of money, medicineEven after centuries of earnest oaths and laws, the debate about whether money compromises medicine remains unresolved, observes Dr. Eli Adashi in a new paper in the AMA Journal of Ethics. The problem might not be truly intractable, he said, but recent reforms will likely make little progress or difference. | |
Veterans returning from Middle East face higher skin cancer riskSoldiers who served in the glaring desert sunlight of Iraq and Afghanistan returned home with an increased risk of skin cancer, due not only to the desert climate, but also a lack of sun protection, Vanderbilt dermatologist Jennifer Powers, M.D., reports in a study published recently in the Journal of Investigative Dermatology. | |
New approach for making vaccines for deadly diseasesResearchers at the Perelman School of Medicine at the University of Pennsylvania have devised an entirely new approach to vaccines - creating immunity without vaccination. | |
Punctuating messages encoded in human genome with transposable elementsSince the classical studies of Jacob and Monod in the early 1960s, it has been evident that genome sequences contain not only blueprints for genes and the proteins that they encode, but also the instructions for a coordinated regulatory program that governs when, where and to what extent these genes and proteins are expressed. The execution of this regulatory code is what allows for the creation of very different cell- and tissue-types from the same set of genetic instructions found in the nucleus of every cell. A recent study published in PNAS (July 27, 2015) shows that critical aspects of this regulatory program are encoded by genomic sequence elements that were previously thought to be mere "junk DNA" with no important functions. | |
Women, blacks face larger loss of life expectancy after heart attackWomen and black patients lost more years of their expected life after a heart attack when compared to white men, according to a study publishing today in the Journal of the American College of Cardiology. | |
Residential location affects pregnant women's likelihood of smokingWomen are more likely to smoke during pregnancy when they live in areas where socio-economic resources are lower but also where smoking is more socially accepted, according to new study from Rice University's Kinder Institute for Urban Research. | |
Study finds no benefit in adding third drug to therapy for older patientsTriple therapy is no better than dual antiplatelet therapy in preventing major adverse cardiac events in older patients with atrial fibrillation who had a heart attack treated with angioplasty, and triple therapy resulted in more complications, according to a study published today in the Journal of the American College of Cardiology. | |
Genetic adaptation keeps Ethiopians heart-healthy despite high altitudesEthiopians have lived at high altitudes for thousands of years, providing a natural experiment for studying human adaptations to low oxygen, a condition known as hypoxia. One factor that may enable Ethiopians to tolerate high altitudes and hypoxia is the endothelin receptor type B (EDNRB) gene. Researchers at University of California, San Diego School of Medicine now find that mice with lower-than-normal levels of EDNRB protein are remarkably tolerant to hypoxia. The study, published this week by the Proceedings of the National Academy of Sciences, provides a mechanism for the gene's role in adaptation to life at high altitudes and suggests that EDNRB could be targeted to treat sea level diseases that stem from lack of oxygen. | |
Simple intervention can moderate anti-vaccination beliefs, study findsIt might not be possible to convince someone who believes that vaccines cause autism that they don't. Telling skeptics that their belief is not scientifically supported often backfires - strengthening, rather than weakening, their anti-vaccine views. But researchers say they have found a way to overcome some of the most entrenched anti-vaccine attitudes: Remind the skeptics, with words and images, why vaccines exist. | |
High academic stress linked to increased illness, injuries among college football playersCoaches and trainers strive to keep their players healthy so they can perform at their maximum potentials. Injury restrictions, or limits on athletes' physical activity due to illnesses or injuries, can keep athletes on the bench for a game or even an entire season. Now, University of Missouri researchers have found college football players are more likely to experience injuries during test weeks than during training camp. The effects of academic stress on injury occurrences are even more pronounced among starting players, the researchers found. | |
Our elegant brain: Motor learning in the fast laneIt takes a surprisingly small cluster of brain cells deep within the cerebellum to learn how to serve a tennis ball, or line up a hockey shot. Researchers at McGill University led by Kathleen Cullen from the Department of Physiology have discovered that to learn new motor skills, neurons within the cerebellum engage in elegant, virtually mathematical, computations to quickly compare expected and actual sensory feedback. They then quickly readjust, changing the strength of connections between other neurons to form new patterns in the brain in order to accomplish the task at hand. | |
Global vaccine-development fund could save thousands of lives, billions of dollarsEbola is a preventable disease, and yet a safe and effective vaccine has not been deployed. As with many vaccines, financial barriers persist: pharmaceutical companies see high costs with limited market potential, and government support is lacking.But there may be a solution to this vaccine crisis with the ability to save at-risk populations, according to a perspective piece written by physicians based at Princeton University, University of Pennsylvania and the Wellcome Trust. | |
FDA clears first 3-D printed prescription drugThe Food and Drug Administration has approved the first prescription drug made through 3-D printing: a dissolvable tablet that treats seizures. | |
FDA approves new rosacea treatment(HealthDay)—A new prescription treatment for the common skin condition rosacea was approved on Monday by the U.S. Food and Drug Administration. | |
Review: mHealth text messages promote medication adherence(HealthDay)—Mobile health (mHealth) short message service text messages can improve medication adherence, according to a review published online July 27 in the Journal of Clinical Nursing. | |
Factors ID'd for MAPK treatment outcome in melanoma(HealthDay)—For patients with metastatic melanoma treated with mitogen-activated protein kinase (MAPK) inhibitors, gender, serum lactate dehydrogenase (LDH), BRAF genotype, and primary melanoma ulceration status are independent factors associated with treatment outcomes, according to research published online July 28 in Cancer. | |
Novel stem cell approach promising for heart failure(HealthDay)—A new method for delivering stem cells to damaged heart muscle has shown early promise in treating severe heart failure, researchers report online July 27 in Stem Cells Translational Medicine. | |
L-carnitine may reduce muscle cramps in patients with cirrhosis(HealthDay)—L-carnitine appears to be safe and effective for reducing muscle cramps in patients with cirrhosis, according to a study published in the August issue of Clinical Gastroenterology and Hepatology. | |
Older smokers with migraines may face added stroke risk(HealthDay)—Older smokers who experience migraines appear to be at increased risk of stroke, a new study suggests. The findings were published online July 22 in Neurology. | |
For obese women, exercise plus phototherapy beneficial(HealthDay)—Exercise training combined with phototherapy is associated with improvements in the metabolic profiles of obese women, according to a study published online July 29 in Lasers in Surgery and Medicine. | |
Review: risk of parasitic myoma post laparoscopic morcellation(HealthDay)—For women undergoing laparoscopic morcellation, the subsequent incidence of parasitic myomas is low, but discussion with patients should include this possibility, according to a review published online July 29 in BJOG: An International Journal of Obstetrics & Gynaecology. | |
Concomitant administration of 9vHPV with MCV4/Tdap feasible(HealthDay)—For 11- to 15-year olds, concomitant administration of Gardasil 9 (9-valent human papillomavirus [9vHPV] vaccine) and Menactra (MCV4; Neisseria meningitides serotypes A/C/Y/W-135) or Adacel (Tdap; diphtheria/tetanus/acellular pertussis) is noninferior to intermittent administration, according to a study published online Aug. 3 in Pediatrics. | |
Case report: pediatric nickel dermatitis caused by belt buckles(HealthDay)—Nickel dermatitis has been observed in a number of children whose symptoms resolved after avoiding contact with dimethylglyoxime (DMG)-positive belt buckles. These observations have been published as a case report online Aug. 3 in Pediatrics. | |
Head injury tied to long-term attention issues in kids(HealthDay)—Children who suffer even mild brain injuries may experience momentary lapses in attention long after their accident, new research finds. | |
Scientists study the benefits of wormsOf all the things young children put in their mouths, dirt may provoke the most concern among parents fearful that eating it will give kids worms. | |
Researchers develop "intelligent" training tool to treat prostate cancerResearchers at Carnegie Mellon University have developed a new approach to improve training for cryosurgery, a procedure used to treat prostate cancer by freezing and destroying the diseased tissues. The new approach will shorten the learning curve and improve the quality of the minimally invasive treatment by reducing complications, shortening recovery times and lowering health care costs. | |
Chronic insomnia sufferers may find relief with half of standard pill doseThe roughly nine million Americans who rely on prescription sleeping pills to treat chronic insomnia may be able to get relief from as little as half of the drugs, and may even be helped by taking placebos in the treatment plan, according to new research published today in the journal Sleep Medicine by researchers from the Perelman School of Medicine at the University of Pennsylvania. Their findings starkly contrast with the standard prescribing practices for chronic insomnia treatment. | |
Web interventions for alcohol misuseA systematic evidence review published in Annals of Internal Medicine finds that low-intensity electronic interventions may slightly reduce alcohol consumption among adults and college students, but may be ineffective for reducing binge-drinking frequency and the negative social consequences associated with alcohol misuse. The evidence suggests that higher intensity interventions may be needed to reduce drinking to a level that is compliant with recommended drinking limits. | |
Waiving Medicare's 3-day rule lessens hospital stayFor nearly 50 years Medicare has required patients to endure at least a three-day stint in the hospital before they become eligible for coverage of skilled nursing care afterward. A new study, however, finds that the main consequence of waiving the rule, as Medicare Advantage plans commonly do, has been a good one: less time in a bed and a gown for those who go on to skilled nursing care. | |
Addressing social factors critical for continued fight against heart disease and stroke in AmericaDeaths from heart attacks, strokes and other heart diseases have been declining, but social factors, including race, income, environment and education could reverse that trend according to a first of its kind scientific statement from the American Heart Association. | |
Alps tests to see if altitude can boost athletes' performanceResearchers have taken to the peaks of France's Mont Blanc this summer to see whether the body's production of red blood cells at high altitudes has similar effects in athletes to doping agents like EPO. | |
'Brain training' app may improve memory and daily functioning of people with schizophreniaA 'brain training' iPad game developed and tested by researchers at the University of Cambridge may improve the memory of patients with schizophrenia, helping them in their daily lives at work and living independently, according to research published today. | |
Hard liquor: Officials seize Chinese spirits laced with ViagraChinese authorities have seized thousands of bottles of spirits laced with chemicals used to make erectile dysfunction drugs such as Viagra, officials said. | |
5 things about Congress' fight over Planned ParenthoodRepublicans will likely lose Monday's Senate showdown over halting federal aid to Planned Parenthood. Yet the political offensive by abortion foes has just started, prompted by a batch of unsettling videos that has focused attention on the group's little-noticed practice of providing fetal tissue to researchers. | |
Suffering in silenceFemale genital mutilation (FGM): the United Nations considers it a violation of human rights; the Australian Government, a criminal offence. Though it has been outlawed in many countries, the 2000-year-old practice continues, with devastating outcomes for women and girls. Angela Dawson explains why FGM must end and how we can all contribute to its abolition. | |
Liver disease may necessitate transplantYour liver processes all the nutrients the body requires. It produces bile, which helps the body absorb food and also eliminates potentially toxic substances. Damage to the liver can impair these and many other processes. | |
Irradiation of regional nodes in stage I - III breast cancer patients affects overall survivalAt a median follow-up of 10.9 years, an EORTC study has shown that irradiation of regional nodes in patients with stage I, II, or III breast cancer has a marginal effect on overall survival, the primary endpoint (at 10 years, overall survival was 82.3 % for regional irradiation versus 80.7% for no regional irradiation, (HR=0.87 (95%CI: 0.76, 1.00), p=0.06). The results published in the New England Journal of Medicine also showed that disease-free survival, distant-disease-free survival, and breast cancer mortality were significantly improved. Side effects were very limited, although very long-term toxicity of radiation remains unknown. | |
Kraft recalls cheese slices for choking riskThe Kraft Heinz Co. is voluntarily recalling about 36,000 cases of Kraft Singles cheese products because some of the packaging film may stick to the slices and pose a choking hazard. | |
Four people dead from Legionnaires' disease in New YorkFour people have died from Legionnaires' disease in New York since mid-July and another 55 are currently hospitalized, city health officials said Monday. | |
Unsuccessful fertility treatments not linked with clinically diagnosed depression in womenAn analysis of data on more than 41,000 Danish women who received assisted reproductive fertility treatment shows that unsuccessful treatment is not linked with an increased risk of clinically diagnosed depression compared with successful treatment. | |
Not-for-profit hospitals may not trump for-profits in providing uncompensated careWhile not-for-profit hospitals receive substantial tax benefits, some do not provide free or subsidized care for a higher percentage of patients living in poverty than their for-profit counterparts, according to a study of California medical centers. |
Other Sciences news
Best of Last Week – A blow for supersymmetry, a saltwater lamp and sleep found to make memories more accessibleIt was a very interesting week for physics as experiments at the LHC showed that a particle known as the "beauty quark" behaved as has been predicted by the Standard Model and thus represented a new blow for the "supersymmetry" physics theory. | |
Archaeologists uncover entrance gate and fortification of Biblical cityThe Ackerman Family Bar-Ilan University Expedition to Gath, headed by Prof. Aren Maeir, has discovered the fortifications and entrance gate of the biblical city of Gath of the Philistines, home of Goliath and the largest city in the land during the 10th-9th century BCE, about the time of the "United Kingdom" of Israel and King Ahab of Israel. The excavations are being conducted in the Tel Zafit National Park, located in the Judean Foothills, about halfway between Jerusalem and Ashkelon in central Israel. | |
Earliest evidence of reproduction in a complex organismResearchers led by the University of Cambridge have found the earliest example of reproduction in a complex organism. Their new study has found that some organisms known as rangeomorphs, which lived 565 million years ago, reproduced by taking a joint approach: they first sent out an 'advance party' to settle in a new area, followed by rapid colonisation of the new neighbourhood. The results, reported today in the journal Nature, could aid in revealing the origins of our modern marine environment. | |
Vanity and predatory academic publishers are corrupting the pursuit of knowledgeRadio National's Background Briefing recently presented a grim academic tale of identity theft, shambolic conferences, exploitation, sham peer review and pseudoscience. | |
Satcoms linking rural schools in South Africa and ItalyTeachers and students from rural schools in South Africa and Italy are benefiting from an ESA-supported project that enriches education through satcoms. | |
Israel-British project makes Hebrew texts available onlineOne of the oldest surviving Hebrew manuscripts, a bible dating back more than 1,000 years, will soon be available online in a joint project with The British Library in London, the National Library of Israel said Monday. | |
Look into my pupils: Pupil mimicry may lead to increased trustPeople often mimic each other's facial expressions or postures without even knowing it, but new research shows that they also mimic the size of each other's pupils, which can lead to increased trust. The findings, published in Psychological Science, a journal of the Association for Psychological Science, reveal that participants who mimicked the dilated pupils of a partner were more likely to trust that partner in an investment game, but only when the partner was part of the same ethnic group. | |
Study uncovers communication strategies couples can use to address financial uncertaintyMoney can be a significant source of conflict in relationships, particularly during stressful times. New research from North Carolina State University details techniques romantic couples can use to address financial uncertainty, highlighting the importance of communication in managing uncertainty and reducing stress. | |
The dream team: What makes a group successful at transitioning from one task to anotherThe question has likely occurred at one time or another to every group leader, from heads of family to heads of state: How do I get my team to adapt to new and changing goals without diminishing its performance? | |
New analysis suggests body size increase did not play a role in the origins of Homo genusA new analysis of early hominin body size evolution led by a George Washington University professor suggests that the earliest members of the Homo genus (which includes our species, Homo sapiens) may not have been larger than earlier hominin species. As almost all of the hows and whys of human evolution are tied to estimates of body size at particular points in time, these results challenge numerous adaptive hypotheses based around the idea that the origins of Homo coincided with, or were driven by, an increase in body mass. |
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