817,221 articles

Researchers evaluate conservation of island bird species in the context of climate change

The island scrub-jay is the only island endemic passerine species in the continental United States. Although it is not classified as endangered, the species faces a number of threats to its long-term survival, and climate change is expected to exacerbate those challenges. A new study discusses the conservation management of the island scrub-jay, and highlights how management of this species may...

Viagra against heart failure: Researchers at the RUB and from Rochester throw light on the mechanism

How sildenafil, the active ingredient in Viagra, can alleviate heart problems is reported by Bochum's researchers in cooperation with colleagues from the Mayo Clinic in Rochester (Minnesota) in the journal Circulation. They studied dogs with diastolic heart failure, a condition in which the heart chamber does not sufficiently fill with blood. The scientists showed that sildenafil makes stiffened...

What are emotion expressions for?

That cartoon scary face -- wide eyes, ready to run -- may have helped our primate ancestors survive in a dangerous wild, according to the authors of an article published in Current Directions in Psychological Science, a journal of the Association for Psychological Science. The authors present a way that fear and other facial expressions might have evolved and then come to signal a person's...

Strong earthquakes rattle NZ's Christchurch (AP)

AP - A series of strong earthquakes struck the New Zealand city of Christchurch on Friday, rattling buildings, sending goods tumbling from shelves and prompting terrified holiday shoppers to flee into the streets. There was no tsunami alert issued and the city appeared to have been spared major damage.

Windows Phone an overlooked worthy alternative to Android, iPhone

There are many smartphone users who are not giving Microsoft's Windows Phone the look it deserves. Together Android and iOS hog more than 80 percent of the U.S. market share. Android's large chunk of the market is split among a horde of devices from several makers while Apple has relatively few.

Scientists Discover First Ever Earth-Sized and Smaller Planets (ContributorNetwork)

ContributorNetwork - Researchers, scientists, and astronomers -- both amateur and professional -- have added hundreds of planets to the rolls of confirmed worlds orbiting other stars in the past few years, and the number is accelerating due to interest and thousands of sighted possible planets revealed by the various telescopes scanning the heavens.

Genetic study of black chickens shed light on mechanisms causing rapid evolution in domestic animals

The genetic changes underlying the evolution of new species are still poorly understood. For instance, we know little about critical changes that have happened during human evolution. Genetic studies in domestic animals can shed light on this process due to the rapid evolution they have undergone over the last 10,000 years. A new study describes how a complex genomic rearrangement causes a...

Double trouble: Concomitant immune challenges result in CNS disease

A research team led by Glenn Rall at the Fox Chase Cancer Center in Philadelphia, PA developed a novel mouse model to show that a fatal central nervous system (CNS) disease can be caused by a pathogen that does not replicate in the CNS. The results of this new study are published December 22nd in the Open Access journal PLoS Pathogens.

Fixing common blood disorder would make kidney transplants more successful

Correcting anemia, a red blood cell deficiency, can preserve kidney function in many kidney transplant recipients, according to a study appearing in an upcoming issue of the Journal of the American Society Nephrology (JASN). The results indicate that aggressively treating anemia may help save the kidneys—and possibly the lives—of many transplant recipients.

Genetic study of black chickens shed light on mechanisms causing rapid evolution in domestic animals

The genetic changes underlying the evolution of new species are still poorly understood. For instance, we know little about critical changes that have happened during human evolution. Genetic studies in domestic animals can shed light on this process due to the rapid evolution they have undergone over the last 10,000 years. A new study published today describes how a complex genomic rearrangement...

Neuroscientists identify a master controller of memory

When you experience a new event, your brain encodes a memory of it by altering the connections between neurons. This requires turning on many genes in those neurons. Now, MIT neuroscientists have identified what may be a master gene that controls this complex process.

New study shows how much food is needed by seabirds

(PhysOrg.com) -- An international group of scientists, including one from the U.S. Geological Survey, has shown that many seabirds begin to suffer when the food available for them in the ocean declines below a critical level. This level is about one-third of the maximum amount of food available historically. They have shown that this critical level is about the same for seabirds wherever they...