One more reason to visit Hawaii.

Incorporating macadamia nuts into a heart healthy diet can reduce cardiovascular disease risks according to Penn State researchers.

"We looked at macadamia nuts because they are not currently included in the health claim for tree nuts, while other tree nuts are recommended as part of a healthy diet," says Dr. Amy E. Griel, recent Ph.D. recipient in nutritional sciences. "Macadamia nuts have higher levels of monounsaturated fats, like those found in olive oil compared with other tree nuts."

According to a study in the May/June 2007 issue of the journal Ground Water, pharmaceuticals are being found in septic tanks and, consequentially, ground water due to incomplete human metabolism and excretion into the waste stream or by disposal of unused medications in the toilet or down the sink.

This screening-level study investigated the occurrence of pharmaceuticals in areas receiving waste water from septic tanks located in sand and gravel deposits in Missoula, Montana.

Tungsten began increasing in trees in Fallon, Nev. several years before the town's rise in childhood leukemia cases, according to a new research report.

The amount of tungsten in tree rings from Fallon quadrupled between 1990 and 2002, whereas the amount in tree rings from nearby towns remained the same, according to a research team led by Paul R. Sheppard of The University of Arizona's Laboratory of Tree-Ring Research.

More than one in three HIV positive gay men say they have unprotected sex, reveals a community survey, published ahead of print in the journal Sexually Transmitted Infections.

And almost one in five HIV negative men said that they do the same, the figures show.

Electromagnetic fields do not pose a health hazard to workers in the electrical energy supply industry, suggests a large study of 28,000 people, published ahead of print in Occupational and Environmental Medicine.

Exposure to low frequency electromagnetic fields of 50 to 60 Hz has been implicated in an increased risk of leukaemia, brain and breast cancers.

The researchers used the health and employment records of more than 22,000 utility workers at 99 different electrical energy supply companies in Denmark.  All the employees had been employed at the companies for a minimum of three months since 1968, and they were tracked for an average of nearly 23 years or until death.

There are many reasons why living in dense groups with others of your own kind is a good idea. Oftentimes, aggregations of a species serve as protection from predators and harsh environments or may be beneficial to future reproductive success. However, in the case of oyster larvae, the selection of a place to call home can be a life or death decision.