News Articles

A new study of animal behavior suggests that evolution is hard at work when it comes to the acrobatic courtship dances of  male golden-collared manakins, a tropical bird species.There are about 60 different species of manakins, most of which perform, to some degree, a physically complex display behavior to both court females and to compete with other males. The new study says
the ability to detect testosterone in the body regulates the acrobatic courtship and competitive behavior - bird brawn.  

Neutrinos are among the more mysterious elementary particles in the universe: Billions of them pass through every cell of our bodies every second, yet these ghostly particles are incredibly difficult to detect, because they don’t appear to interact with ordinary matter. Scientists have set theoretical limits on neutrino mass, but researchers have yet to precisely detect it.

51 Pegasi b, about 50 light-years from Earth in the constellation of Pegasus, was discovered in 1995 and was the the first confirmed exoplanet to be found orbiting an ordinary star like our Sun. It is the archetypal Hot Jupiter -- a class of planets similar in size and mass to Jupiter but orbiting much closer to their parent stars.
Since that landmark discovery, more than 1,900 exoplanets in 1,200 planetary systems have been confirmed, but 51 Pegasi b now has another "first" - it has been directly detected in visible light.

While growing new organs from a patient's own stem cells is the future much of science is working toward, there are people who need replacements right now. Lots of people are signed up for organ donations in the case of death but willing donors is not the biggest obstacle.It's time. Typically, donor organs have to kept in preservation solution at a static temperature of 4 °C and the clock begins ticking immediately. They have short preservation times; about 6 hours for hearts and lungs, 12 hours for livers, and 20 hours for kidneys.

The widely held belief that depression is due to low levels of serotonin in the brain and that raising those levels is an effective treatment is invalid, according to David Healy, Professor of Psychiatry at the Hergest psychiatric unit in North Wales. Instead it is "the marketing of a myth."The serotonin reuptake inhibiting (SSRI) group of drugs came on stream in the late 1980s, nearly two decades after first being mooted, writes Healy.  The delay centered on finding an indication. 

Invasive pests known as spruce bark beetles have been attacking Alaskan forests for decades, killing more than 1 million acres of forest on the Kenai Peninsula in southern Alaska for more than 25 years.
Beyond environmental concerns regarding the millions of "beetle kill" dead trees, inhabitants of the peninsula and surrounding areas are faced with problems including dangerous falling trees, high wildfire risks, loss of scenic views and increased soil erosion. Intriguingly, a sociologist from the University of Missouri says that human perception of the beetle kill problem in the Kenai Peninsula has improved over time, despite little improvement in the environmental conditions.

A study of approximately 95,000 children with older siblings found that the measles-mumps-rubella (MMR) vaccine is not associated with an increased risk of autism spectrum disorders regardless of whether older siblings had been diagnosed on the autism spectrum - and epidemiological papers say those children should be at higher risk for an autism diagnosis.During the last 15 years, no valid study has found a link between the MMR vaccine and ASD but some parents and people selling alternative medicines continue to associate the vaccine with ASD. Surveys of parents who have children with ASD suggest that many believe the MMR vaccine was a contributing cause.

Heavy snoring and sleep apnea may be linked to memory and thinking decline at an earlier age, according to a new study - but treating the disorders with a breathing machine may delay the decline. 
For the study, the medical histories for 2,470 people ages 55 to 90 were reviewed. Participants were categorized as either free of memory and thinking problems, in early stages of mild cognitive impairment (MCI), or with Alzheimer's disease. The researchers also looked at people with untreated sleep breathing problems versus those without the sleep breathing problems and also untreated versus treated people with sleep breathing problems.

Teachers are likely to interpret students' misbehavior differently depending on the student's race, according to a new paper. 
Racial differences in school discipline are widely known, and black students across the United States are more than three times as likely as their white peers to be suspended or expelled, according to the background information, but the psychological processes that contribute to those differences have not been clear.
"The fact that black children are disproportionately disciplined in school is beyond dispute," said Stanford psychology Professor Jennifer Eberhardt in an interview. "What is less clear is why."

A new analysis of 1,000 years of temperature records suggests global warming is not progressing as fast as it was projected under the most severe emissions scenarios outlined by the Intergovernmental Panel on Climate Change (IPCC). Natural variability in surface temperatures - caused by interactions between the ocean and atmosphere, and other natural factors - can account for observed changes in the recent rates of warming from decade to decade and these "climate wiggles" can slow or speed the rate of warming from decade to decade, or accentuate or offset the effects of increases in greenhouse gas concentrations.

A number of studies have shown that coffee helps to protect against breast cancer and new work led by Lund University has found that it also inhibits the growth of tumors and reduces risk of recurrence in women who have been treated with the drug tamoxifen.In the cell study, the researchers looked more closely at two substances that usually occur in the coffee drunk in Sweden – caffeine and caffeic acid - and is a follow-up of the results the researchers obtained two years ago. 

Western dietary guidelines support the consumption of dairy but how much of the specific ratios is cultural versus evidence-based has always been a debate.One thing that has never been debate is if there is anything special about yogurt. Though it has become increasingly popular due to marketing claims about "probiotics" there is no evidence any of it is true, nor is it helping with any of the physical and mental parameters analyzed in a new study of 4,445 Spanish adults.