University of Alberta researchers have uncovered physical proof that animals existed 585 million years ago, 30 million years earlier than all previous established records show. The discovery was made U of A geologists Ernesto Pecoits and Natalie Aubet in Uruguay. They found fossilized tracks of a centimetre long, slug-like animal left behind 585 million years ago in a silty sediment. Along with other U of A researchers, the team determined that the tracks were made by a primitive animal called a bilaterian, which is distinguished from other non-animal, simple life ...

Both innate and adaptive immune responses play an important role in controlling influenza virus infection, according to a study, published in the Open Access journal PLoS Computational Biology, by researchers from Oakland University, Michigan, and Los Alamos National Laboratory, New Mexico, USA. Influenza, as a contagious respiratory illness remains a major public health problem worldwide. Seasonal and pandemic influenza results in approximately 3 to 569 million cases of severe illness and approximately 250,000 to 500,000 deaths worldwide. Although most infected subjects ...

300 million years ago, the Earth suddenly interrupted massive production of coal. This fact determined the end of the Carboniferous, a period of the Paleozoic Era that had started 60 million years before, characterized by the successive formation of large carbon beds arising from accumulation and burial of ancient trees growing up in vast marshy forests. An international scientific team with participation of the Spanish National Research Council (CSIC) has found out that the end of this coal age coincided with the origin of a group of highly specialized fungi. The results, ...

A team of scientists, led by researcher Carles Lalueza-Fox from CSIC (Spanish National Research Council), has recovered - for the first time in history - part of the genome of two individuals living in the Mesolithic Period, 7000 years ago. Remains have been found at La Braña-Arintero site, located at Valdelugueros (León), Spain. The study results, published in the Current Biology magazine, indicate that current Iberian populations don't come from these groups genetically. The Mesolithic Period, framed between the Paleolithic and Neolithic Periods, is characterized by ...

Astronomer Alain Lecavelier des Etangs (CNRS-UPMC, France) and his team used Hubble to observe the atmosphere of exoplanet HD 189733b [1] during two periods in early 2010 and late 2011, as it was silhouetted against its parent star [2]. While backlit in this way, the planet's atmosphere imprints its chemical signature on the starlight, allowing astronomers to decode what is happening on scales that are too tiny to image directly. The observations were carried out in order to confirm what the team had previously seen once before in a different planetary system: the evaporation ...

HOUSTON – (June 28, 2012) – Researchers at Rice University have developed a lithium-ion battery that can be painted on virtually any surface. The rechargeable battery created in the lab of Rice materials scientist Pulickel Ajayan consists of spray-painted layers, each representing the components in a traditional battery. The research appears today in Nature's online, open-access journal Scientific Reports. "This means traditional packaging for batteries has given way to a much more flexible approach that allows all kinds of new design and integration possibilities ...

A new discovery could make more tomatoes taste like heirlooms, reports an international research team headed by a University of California, Davis, plant scientist. The finding, which will be reported in the June 29 issue of the journal Science, has significant implications for the U.S. tomato industry, which annually harvests more than 15 million tons of the fruit for processing and fresh-market sales. "This information about the gene responsible for the trait in wild and traditional varieties provides a strategy to recapture quality characteristics that had been unknowingly ...

A new study to be presented at the Society for Experimental Biology meeting on 30th June has shown that caffeine boosts power in older muscles, suggesting the stimulant could aid elderly people to maintain their strength, reducing the incidence of falls and injuries. For adults in their prime, caffeine helps muscles to produce more force. But as we age, our muscles naturally change and become weaker. Sports scientists at Coventry University looked for the first time at whether these age-related changes in muscle would alter the effect of caffeine. They found that ...

On the centenary of Scott's ill-fated Terra Nova expedition to the South Pole, a study to be presented at the Society for Experimental Biology meeting on Sunday 1st July has shown that Scott's men starved to death because they were consuming far too few calories to fuel their daily exertion. The researchers, environmental physiologist Dr Lewis Halsey of the University of Roehampton and polar explorer and physician Dr Mike Stroud, examined the voyage in light of today's knowledge of nutrition and how our bodies respond to extreme exercise, cold, and high altitude. They ...

New research published in BMC Genetics shows that the rhesus macaque has three times as much genetic variation than humans. However despite much of this extra variation being within genes, it does not affect protein function. Consequently damaging variations are at similar levels in macaques and humans - indicating a strong selection pressure to maintain gene function regardless of mutation rate or population size. Humans and rhesus macaques shared a common ancestor approximately 25 million years ago. Although there are now over seven billion humans on the planet only ...

Millions of people worldwide are exposed to arsenic from contaminated water, and we are all exposed to arsenic via the food we eat. New research published in BioMed Central's open access journal Nutrition Journal has demonstrated that people who ate more dietary vitamin B12 and animal protein had lower levels of arsenic (measured by deposition in toenails). Total dietary fat, animal fat, vegetable fat and saturated fat were also all associated with lower levels of arsenic, while omega 3 fatty acids, such as those found in fish oil, were associated with increased arsenic. Long ...

SAN FRANCISCO, CA—June 28, 2012—Scientists at the Gladstone Institutes and an international team of researchers have generated a human model of Huntington's disease—directly from the skin cells of patients with the disease. For years, scientists have studied Huntington's disease primarily in post-mortem brain tissue or laboratory animals modified to mimic the disease. Today, in Cell Stem Cell, the international team shows how they developed a human model of Huntington's disease, which causes a diverse range of neurological impairments. The new model should help scientists ...

Baltimore, MD — In mammals, most lipids (such as fatty acids and cholesterol) are absorbed into the body via the small intestine. The complexity of the cells and fluids that inhabit this organ make it very difficult to study in a laboratory setting. New research from Carnegie's Steven Farber, James Walters and Jennifer Anderson reveals a technique that allows scientists to watch lipid metabolism in live zebrafish. This method enabled them to describe new aspects of lipid absorption that could have broad applications for human health. Their work is published in Chemistry ...

For many grocery shoppers, those perfect, red tomatoes from the store just can't match the flavor from the home garden. Now, researchers at Boyce Thompson Institute for Plant Research at Cornell University, USDA and the University of California at Davis have decoded a gene that contributes to the level of sugar, carbohydrates and carotenoids in tomatoes. (Science, June 29, 2012) Cuong Nguyen, a Cornell graduate student in plant breeding working at the Boyce Thompson Institute (BTI), along with colleagues at BTI, USDA, UC Davis, Universidad Politecénica de Valencia (Spain), ...

LOS ANGELES (EMBARGOED UNTIL NOON EDT ON JUNE 28, 2012) – Cedars-Sinai scientists have joined with expert colleagues around the globe in using stem cells to develop a laboratory model for Huntington's disease, allowing researchers for the first time to test directly on human cells potential treatments for this fatal, inherited disorder. As explained in a paper published June 28 on the Cell Stem Cell website and scheduled for print in the journal's Aug. 3 issue, scientists at Cedars-Sinai's Regenerative Medicine Institute and the University of Wisconsin took skin cells ...

Christina Wang, M.D., lead investigator at Los Angeles Biomedical Research Institute (LA BioMed) – one of the leading biomedical research institutes in the country – recently completed a study utilizing a new contraceptive gel that has the potential to be developed as a user controlled chemical birth control agent for males. The gel, which contains testosterone and a synthetic progestin called Nestorone, sharply lowers sperm counts in men with few side effects. The study conducted at LA BioMed and the University of Washington is funded by the National Institutes of Child ...

Johns Hopkins researchers, working with an international consortium, say they have generated stem cells from skin cells from a person with a severe, early-onset form of Huntington's disease (HD), and turned them into neurons that degenerate just like those affected by the fatal inherited disorder. By creating "HD in a dish," the researchers say they have taken a major step forward in efforts to better understand what disables and kills the cells in people with HD, and to test the effects of potential drug therapies on cells that are otherwise locked deep in the brain. Although ...

The visual information from eyes is sent into the brain unconsciously even if you are not aware. One of examples of unconscious seeing is a phenomenon of "blindsight" [Subjects have no awareness, but their brains can see ] in subjects with visual impairment, caused by the damage of a part of the brain called the visual cortex. Although it is already reported that the patients with damage in the visual cortex, who were not aware of seeing, can walk and avoid obstacles, it was not proved whether this was really blindsight. In this new study, the international collaborative ...

Not lying is regarded as a learned and well-known rule of honesty among 14 and 15-year-olds at Zurich's high schools. Additional theoretical moral knowledge also includes conventional rules of honesty such as not using unfair aids during school tests or forging parents' signatures. What might seem like a duty to live up to school expectations at face value is actually a very different story beneath the surface. After all, dishonest practices are permitted for young people in certain classroom situations and with individual teachers. "In such cases, young people deem it ...

The journal Nature has published a study analysing the lines of arrested growth (LAG) in the bones of around a hundred ruminants, representative of the specific and ecological diversity of that group of mammals. The results show that the presence of these lines is not an indicator of an ectothermic physiology (does not generate internal heat), as had previously been thought, since all warm-blooded mammals have them. The study therefore dismantles the key argument of the hypothesis that dinosaurs could have been cold-blooded reptiles. The work was carried out by researchers ...

A characteristic feature of most animals is their ability to move quickly with the help of their musculature. Animals that can move are able to flee, hunt for prey, travel long distances or conquer new habitats. The evolution of muscles was thus a fundamental step during animal evolution. While the structure and function of muscles, especially of vertebrates, have been intensively studied, the evolutionary origin of smooth and striated muscles has so far been enigmatic. Comparative genome and gene expression studies, performed by researchers Patrick Steinmetz, Johanna Kraus ...

Genetic diversity arises through the interplay of mutation, selection and genetic drift. In most scientific models, mutants have a fitness value which remains constant throughout. Based on this value, they compete with other types in the population and either die out or become established. However, evolutionary game theory considers constant fitness values to be a special case. It holds that the fitness of a mutation also depends on the frequency of the mutation. Scientists from the Max Planck Institute for Evolutionary Biology in Plön and the University of British Columbia ...

RUB biologists have deliberately transformed stem cells from the spinal cord of mice into immature nerve cells. This was achieved by changing the cellular environment, known as the extracellular matrix, using the substance sodium chlorate. Via sugar side chains, the extracellular matrix determines which cell type a stem cell can generate. "Influencing precursor cells pharmacologically so that they transform into a particular type of cell can help in cell replacement therapies in future" says Prof. Dr. Stefan Wiese, head of the Molecular Cell Biology work group. "Therapies, ...

Scientists at the Novo Nordisk Foundation Center for Protein Research at the University of Copenhagen have used a new method to assemble a massive catalogue of data on proteins. This gives them unprecedented insight into a process called protein phosphorylation. The research was recently published in the scientific journal Nature Communications. Postdoc Alicia Lundby, from the Novo Nordisk Foundation Center for Protein Research, says: "Phosphorylation changes are really important to our understanding of cancer and other diseases. Although the study of phosphorylation ...

Over the last decade, an average of 60,000 km2 of the Baltic Sea bottom has suffered from hypoxia without enough oxygen to support its normal ecosystem. Several large-scale geo-engineering interventions are currently on the table as proposed solutions to this problem. Researchers from Lund University are calling for geo-engineering efforts that mix oxygen into the Deep Baltic to be abandoned. In the June 28 edition of Nature, researchers warn of the unforeseen effects of geo-engineering to relieve the lack of oxygen in bottom waters. "Such radical remediation measures ...