Updated: 31 min 47 sec ago
The number of plant species growing just next to restored streams can take up to 25 years to increase above those channelized during the timber floating era, research concludes.
Electrical engineers have demonstrated a new way to harness light particles, or photons, that are connected to each other and act in unison no matter how far apart they are -- a phenomenon known as quantum entanglement.
Using the nation's weather radar network, two doctoral students have developed a technique for forecasting something other than the weather: the orientation behavior of birds as they migrate through the atmosphere at night. The students have discovered a way to use the latest dual-polarization radar upgrade to measure broad-scale flight orientation of nocturnal migrant birds -- a promising development for biologists and bird enthusiasts.
A pair of paleobiologists have determined that the world's most numerous and diverse vertebrates -- ray-finned fishes -- began their ecological dominance of the oceans 66 million years ago, aided by the mass extinction event that killed off dinosaurs.
Partners who become romantically involved soon after meeting tend to be more similar in physical attractiveness than partners who get together after knowing each other for a while, according to new findings.
The brains of people with recurrent depression have a significantly smaller hippocampus -- the part of the brain most associated with forming new memories -- than healthy individuals, a new global study of nearly 9,000 people reveals.
Scientists have developed an 'olfactory fingerprint' test that may do more than just identify individuals.
Type Ia supernovae are the 'standard candles' astrophysicists use to chart distance in the Universe. But are these dazzling exploding stars truly all the same? To answer this, scientists must first understand what causes stars to explode and become supernovae.
Recent studies are revealing a complex picture of cancer progression in which certain genes that drive tumor growth in the earlier stages get suppressed in later stages -- taking a step back to move forward.
Analyses of carbon emissions may be misleading as they failed to include the impacts of policies such as trading schemes, emission caps or quotas, experts say in a new article.
Scientists behind the first global distribution maps of two species of dengue and chikungunya-carrying mosquitoes warn they are spreading to new areas where they could cause disease.
A common heart feature long thought to have negligible effects on human health and performance may be problematic at high altitude. That's a key finding from a study that looked at the effects of a condition known as patent foramen ovale in a high-altitude Bolivian setting.
Efficacy of topical benzoyl peroxide on the reduction of propionibacterium acnes during shoulder surgery
The effect that topical benzoyl peroxide (BPO), with chlorhexidine skin preparation, has on the presence of Propionibacterium acnes cultured at the time of shoulder surgery has been the focus of recent study. The authors hypothesized that adding topical BPO, the active ingredient in Clearasil, to the pre-operative skin preparation would reduce the number of positive P. acnes cultures identified during surgery. P. acnes infection is a significant problem after shoulder surgery. Residual P. acnes is found on the skin up to 29% of the time immediately after surgical skin preparation and in 70% of dermal biopsy specimens. These residual bacteria may be a source for infection. Identifying more ideal skin preparation may help reduce the risk of infection.
The cause of celiac disease has been found, researchers claim. Experts estimate that 1% of people have celiac disease. This is a partly hereditary disease that may place considerable strain on patients and their families. The immune system of patients with celiac disease reacts to gluten proteins from cereal grains, causing inflammation of the mucous membrane of the small intestine. This reaction to gluten causes the immune system of celiac patients to attack their own body.
A new method keeps salmon fresh for a whole month, without the use of chemicals. The technology is called superchilling, and it lies somewhere between freezing the fish and cooling it down. Now it is about to provide useful help to organic food producers.
Patients who travel abroad for medical treatment risk returning with complications or infections that require costly treatment, and is one of the issues highlighted in a new handbook exploring medical tourism.
Scientists have analyzed the potentials of sustainable use of biomass on the Upper Rhine. The conclusion drawn by the researchers: Further increase in biomass production is limited, as this would require more area. However, a big potential still lies in increasing the efficiency. Their recommendation for the Upper Rhine region: Development of more efficient technologies, enhanced multiple use of biomass, and transnational exchange of knowledge.
Rocks store information about the temperatures that they have experienced. Now, for the first time, researchers have developed a method that reveals low-temperature information (from 35 °C and higher) on a relatively short timescale of thousands of years. The new method might find application in locating geothermal reservoirs and in maintaining underground tunnels.
Researchers have calculated the number of undiscovered meteorite impact sites on Earth's surface. Geologists say a total of 188 have been confirmed so far, and 340 are still awaiting discovery. Meteorite impacts have shaped the development of the Earth and life repeatedly in the past. The extinction of the dinosaurs, for instance, is thought to have been brought on by a mega-collision at the end of the Cretaceous period. But how many traces of large and small impacts have survived the test of time?
Scientists have discovered a new inherited form of obesity and type 2 diabetes in humans. Researchers discovered the new defect by sequencing the DNA of an extremely obese young woman and members of her family. In addition to an increased appetite leading to severe weight problems from childhood, she had type 2 diabetes, learning difficulties, and reproductive problems.