PROVIDENCE, R.I. – Julie Boergers, Ph.D., a psychologist and sleep expert from the Bradley Hasbro Children's Research Center, recently led a study linking later school start times to improved sleep and mood in teens. The article, titled "Later School Start Time is Associated with Improved Sleep and Daytime Functioning in Adolescents," appears in the current issue of the Journal of Developmental & Behavioral Pediatrics.

CORVALLIS, Ore. – In a finding that overturns the conventional view that large old trees are unproductive, scientists have determined that for most species, the biggest trees increase their growth rates and sequester more carbon as they age.

In a letter published today in the journal Nature, an international research group reports that 97 percent of 403 tropical and temperate species grow more quickly the older they get. The study was led by Nate L. Stephenson of the U.S. Geological Survey Western Ecological Research Center. Three Oregon State University researchers are co-authors: Mark Harmon and Rob Pabst of the College of Forestry and Duncan Thomas of the College of Agricultural Sciences.

If you work in politics or culture, you are probably quick to attribute fast-food consumption as the major factor causing rapid increases in childhood obesity. Scholars the University of North Carolina at Chapel Hill report that fast-food consumption is simply a byproduct of a much bigger problem: poor all-day-long dietary habits that originate in children's homes.

The break-up of the supercontinent Gondwana about 130 Million years ago could have led to a completely different shape of the African and South American continent - with an ocean south of today's Sahara desert.

Researchers from the University of Sydney and the GFZ German Research Centre for Geosciences used plate tectonic and three-dimensional numerical modeling to highlight the importance of rift orientation relative to extension direction as key factor deciding whether an ocean basin opens or an aborted rift basin forms in the continental interior.

Low oxygen conditions often persist inside tumors, but they are sufficient to initiate a molecular chain of events that transform breast cancer cells from being rigid and stationery to mobile and invasive.

A recent study highlighted the importance of hypoxia-inducible factors in promoting breast cancer metastasis.

Many men have been a little overexcited on the dance floor and showed off moves that have never been seen before. Blame alcohol. 

Testosterone has a similar effect. A little too much and the frequency of overzealous wooing behavior may increase, but the quality won't go up with it.

For the male canary, the ability to sing a pitch-perfect song is critical to wooing female canaries and as the seasons change, so does song quality and frequency. 

According to a paper in the Journal of the Academy of Nutrition and Dietetics, obesity may be a socially transmitted disease. Something has to explain why Samoa leads the world in obesity at 75 percent of the population - and they are proud of it

A previous study of European Caucasian patients with sporadic amyotrophic lateral sclerosis demonstrated that a polymorphism in the microtubule-associated protein Tau (MAPT) gene was significantly associated with sporadic amyotrophic lateral sclerosis pathogenesis. To examine this in a different population, Daojun Hong and colleagues from Nanchang University further investigated the association of the MAPT gene with sporadic amyotrophic lateral sclerosis in the Chinese Han population. Researchers detected two genetic variations in MAPT (105788 A > G in intron 9 and 123972 T > A in intron 11) in sporadic amyotrophic lateral sclerosis patients but not controls.

Following its recent synonymisation with Meloidogyne ulmi, a species known to parasitize elm trees in Europe, it has become clear that M. mali has been in the Netherlands for more than fifty years.

Evidences given by the authors suggest that M. mali was probably introduced during the breeding program on Elms against the Dutch Elm Disease (DED) during which large numbers of Elm rootstocks and seeds were imported from several different countries. The study was published in the open access journal ZooKeys.

This news release is available in Spanish.

A study begun in Mexico with the collaboration of university students analysed the effect of weekend alcohol consumption on the lipids comprising cell membrane and its genetic material, i.e. DNA. Until now, the damage to the packaging of nuclear material in the early stages of alcohol abuse has never been documented, perhaps because most of the studies are done at later stages with people who have been consuming alcohol in an addictive way for many years. The results have been published in the journal Alcohol.