A study published this week in the journal Science summarizes the types of surface changes - including the growing fractures, collapsing cliffs, rolling boulders and moving material - observed during Rosetta’s two years at 67P/Churyumov-Gerasimenko. Most comets orbit the Sun in highly elliptical orbits that cause them to spend most of their time in the [...]
Osteoporosis affects more than 200 million people worldwide and is a serious public health concern, according to research. Now, newly published work is the first in men to show that long-term, weight-bearing exercises decrease sclerostin, a protein made in the bone, and increase IGF-1, a hormone associated with bone growth. These changes promote bone formation, increasing bone density.
Patients who underwent ambulatory breast reconstruction and used a mobile app for follow-up care had fewer in-person visits during the first 30 days after the operation without affecting complication rates or measures of patient-reported satisfaction, according to a study.
Marine protected areas (MPAs) are an increasingly popular strategy for protecting marine biodiversity, but a new global study demonstrates that widespread lack of personnel and funds are preventing MPAs from reaching their full potential. Only 9 percent of MPAs reported having adequate staff.
Tasty, versatile, and rich in essential omega-3 fatty acids: salmon is one of the most popular edible fish of all. Shops sell fish caught in the wild, but their main produce is salmon from breeding farms which can pollute rivers, lakes and oceans. Just how big is the problem? Scientists are working to answer this question by examining the dissolved organic compounds which enter Chile’s rivers from salmon farms. They warn that these substances are placing huge strain on ecosystems and are changing entire biological communities.
When geologists went in search for evidence of ancient tsunamis along Southern California’s coastal wetlands, they found something else. Their discoveries have implications for seismic hazard and risk assessment in coastal Southern California.
The Arctic sea ice maximum extent and Antarctic minimum extent are both record lows this year. Combined, sea ice numbers are at their lowest point since satellites began to continuously measure sea ice in 1979.
The earliest mutations of human life have been observed by researchers. Analyzing genomes from adult cells, the scientists could look back in time to reveal how each embryo developed. The study shows that from the two-cell stage of the human embryo, one of these cells becomes more dominant than the other and leads to a higher proportion of the adult body.
The Ebola virus causes a severe, often fatal illness when it infects the human body. Initially targeting cells of the immune system called macrophages, white blood cells that absorb and clear away pathogens, a new study has found a way to potentially 'silence' these Ebola virus-infected macrophages.
Researchers report the discovery of a new technique that could drastically improve the sensitivity of instruments such as magnetic resonance imagers (MRIs) and atomic clocks. The study reports a technique to bypass the Heisenberg uncertainty principle. This technique hides quantum uncertainty in atomic features not seen by the instrument, allowing the scientists to make very high precision measurements.
The brains of those who are born blind make new connections in the absence of visual information, resulting in enhanced, compensatory abilities such as a heightened sense of hearing, smell and touch, as well as cognitive functions (such as memory and language) according to a new study.
New archaeological analysis suggests people of Western Roman Empire switched between Hunnic nomadism and settled farming over a lifetime. Findings may be evidence of tribal encroachment that undermined Roman Empire during 5th century AD, contributing to its fall.
More than a century of theory about the evolutionary history of dinosaurs has been turned on its head following the publication of new research. The work suggests that the family groupings need to be rearranged, redefined and renamed and also that dinosaurs may have originated in the northern hemisphere rather than the southern, as current thinking goes.
A new study has traced the Pavlovian response to a small cluster of brain cells -- the same neurons that go awry during Huntington's disease, Parkinson's disease and Tourette's syndrome. The research could one day help neuroscientists find new approaches to diagnosing and treating these disorders.
A team of paleontologists from the University of Cambridge and the Natural History Museum, London, UK, has proposed radical changes to the dinosaur family tree, based on their careful analysis of dozens of fossil skeletons and tens of thousands of anatomical characters. Dinosaurs were first recognized as a unique group of fossil reptiles in 1842 [...]