Researchers have long thought that low vitamin D could cause depression. However, new research indicates that this association is most likely because of reverse causality: a low concentration of vitamin D is a consequence of depression because people with depression move less and are less exposed to sunlight.
If you're looking for a simple way to lower your risk of dying from a heart attack, consider...
Researchers have characterized the gut microbiome of honey bee queens. This is the first...
There is a resolution revolution underway. Building powerful instruments that shatter the physical limits of optical microscopy, scientists are beginning to watch molecular processes as they happen, and in three dimensions.
Researchers and engineers collaborated to print catheters, stents and filaments that were bioactive, giving these devices the ability to deliver antibiotics and chemotherapeutic medications to a targeted area in cell cultures.
In the last three years, the NSF has taught more than 700 teams of scientists how to commercialize their technology using serial entrepreneur Steve Blank’s “Lean Startup” method. Sharing a common interest to promote societal benefits, NSF teamed with the NIH to pioneer the same program to support biomedical innovation and translation.
Scientists have developed a new test that can predict the survival chances of women with breast cancer by analyzing images of “hotspots” where there has been a fierce immune reaction to a tumor. Researchers used statistical software previously used in criminology studies of crime hotspots to track the extent to which the immune system was homing in and attacking breast cancer cells.
A new drug that prompts cancer cells to self-destruct while sparing healthy cells is now entering phase I clinical trials in humans. The drug, called PAC-1, first showed promise in the treatment of pet dogs with spontaneously occurring cancers, and is still in clinical trials in dogs with osteosarcoma.
The first peek at a major study of how Americans smoke suggests many use combinations of products, and often e-cigarettes are part of the mix. It's a preliminary finding, but it highlights some key questions as health officials assess electronic cigarettes.
For nearly half a century, scientists have been trying to replace precious metal catalysts in fuel cells. Now, for the first time, researchers have shown that an inexpensive metal-free catalyst performs as well as costly metal catalysts at speeding the oxygen reduction reaction in an acidic fuel cell.
Britons may have discovered a taste for bread thousands of years earlier than previously thought, thanks to trade with more advanced neighbors on the European continent. That's the conclusion scientists have drawn after discovering that samples from a now-submerged prehistoric camp in southern England contained traces of ancient wheat DNA.
The organisms commonly known as blue-green algae have proliferated much more rapidly than other algae in lakes across North America and Europe over the past two centuries– and in many cases the rate of increase has sharply accelerated since the mid-20th century.
Scientists have identified two optical structures within the limpet’s shell that give its blue-striped appearance. The structures are configured to reflect blue light while absorbing all other wavelengths of incoming light. The findings represent the first evidence of an organism using mineralized structural components to produce optical displays.
A team of scientists has announced that a small molecule called Tetrandrine, derived from an Asian herb, has shown to be a potent small molecule inhibiting infection of human white blood cells in vitro or petri dish experiments and prevented Ebola virus disease in mice.
Felines have a tremendous sense of smell and vision, but a new study using a maze test has investigated which sense they prefer to use under test conditions and found that sight may be more important than smell.
How was human evolution and migration influenced by past changes in climate? This question has led researchers to drill day and night to great depths in a dried up lake in east Africa. The Chew Bahir Drilling Project, in a remote part of south Ethiopia, will provide a sedimentary record of changes in rainfall, temperature and vegetation, spanning the last 500,000 years of human evolution.
Inflammation— the body’s response to damaging stimuli— may have a protective effect against cardiovascular disease, according to a study. The finding is one of the outcomes of research using a powerful new genetic tool— containing data from over a million individuals— that mimics the behavior of certain anti-inflammatory drugs.
There are few drinks as iconic as a pint of Guinness. It might, therefore, surprise beer connoisseurs to learn that the DNA of the all-important brewing yeast– the building blocks of the perfect stout– is the same as that which encodes the yeast required to brew a clean, crisp lager.
Two identical cigarettes led to a discovery by scientists. Study participants inhaled nicotine, yet they showed significantly different brain activity. Why the difference? Some subjects were told their cigarettes were nicotine free.
A survey of rice, wheat, barley, fruit and vegetable crops found that most mutants created by advanced genetic engineering techniques may be out of the scope of current genetically modified organism (GMO) regulations. Now, two bioethicists are proposing new regulatory models for genome-edited crops and call for clarifying the social issues associated with such genetically engineered crops.
Many car buyers weighing whether they should go all electric to help the planet have at least one new factor to consider before making the switch: geography. Based on a study of a commercially available electric car, scientists are reporting that emissions and driving range can vary greatly depending on regional energy sources and climate.
A protein that protects ticks from freezing temperatures also prevents frostbite when introduced in mice, a study has found. The research is the first to demonstrate the protein's ability to boost frostbite resistance in an adult mammal.
With antibiotic resistance on the rise, scientists are looking for innovative ways to combat bacterial infections. The pathogen that causes conditions from strep throat to flesh-eating disease is among them, but scientists have now found a tool that could help them fight it: a drug approved to treat HIV.
Emulsifiers, which are added to most processed foods to aid texture and extend shelf life, can alter the gut microbiota composition and localization to induce intestinal inflammation that promotes the development of inflammatory bowel disease and metabolic syndrome.
Oats are often touted for boosting heart health, but scientists warn that the grain and its products might need closer monitoring for potential mold contamination. They report that some oat-based breakfast cereals in the U.S. contain a mold-related toxin called ochratoxin A, which has been linked to kidney cancer in animal studies.
Scientists have observed an increase in carbon dioxide's greenhouse effect at the Earth's surface for the first time. The researchers measured atmospheric carbon dioxide's increasing capacity to absorb thermal radiation emitted from the Earth's surface over an eleven-year period at two locations in North America. They attributed this upward trend to rising CO2 levels from fossil fuel emissions.
A unique study of frozen ice cores from the Tibetan Himalayas has shown that international agreements on phasing out the use of toxic persistent organic pollutants are working. Scientists collected and analyzed samples from ice cores that had been laid down over 30 years, to show how residues of Perfluoroalkyl substances in the environment have changed over time.
Viruses that invaded the DNA of humanity's ancestors millions of years ago may now play critical roles in the earliest stages of human development, researchers say. The discovery sheds light on the key part that viruses may have played in human evolution.
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