Two longitudinal studies examine the relationship of maternal PTSD and depression to the mental health and behavior of children who were affected by the 9/11 terrorist attacks. The first study found that preschoolers of mothers who experienced PTSD and depression symptoms exhibited more clinically significant behavior problems. The second study found that direct exposure to 9/11 played a small but significant role in explaining the prevalence of the mothers' and adolescents' PTSD and depression rates.

Radiation similar to that used to treat cancer may someday help clean up environmental disasters such as the Gulf oil spill and detect explosive powder hidden underneath clothing.

Patients who undergo arthroscopic surgery for a mechanical disorder of the hip have a good chance of being able to return to their sport at a high level of competition, according to a new study.

Why does it hurt walking flat-footed after wearing high heels? Researchers looked at the calf muscles of habitual high heel wearers and found that the women's muscle fibers were shorter and their Achilles' tendons much thicker, so their tendons are stiffer and harder to stretch, which makes walking flat-footed uncomfortable after wearing high heels.

Researchers have found that patients' precise genetic background told far more about their potential lung function -- and therefore any damage that has occurred -- than the self-identified racial profile commonly used in such tests. The results point to a more precise method of assessing patients' lung function, as well as the potential impact of using precise genetic benchmarks for assessing health overall.

Chemists report the "ultimate porosity of a nano material" and records for carbon dioxide storage capacity and porosity in an important class of materials known as MOFs. Porosity in materials is essential for capturing carbon dioxide. This research could lead to cleaner energy and the ability to capture heat-trapping carbon dioxide emissions before they reach the atmosphere, which contribute to global warming, rising sea levels and the increased acidity of oceans.

It's nearly impossible to pay attention to one thing for a long time. A new study looks at whether Buddhist meditation can improve a person's ability to be attentive and finds that meditation training helps people do better at focusing for a long time on a task that requires them to distinguish small differences between things they see.

Cells that consume parts of themselves can stop this process autonomously as well, according to new research. The self-cannibalism is part of the normal digestive process of the cell, but also a survival mechanism in times of famine. This is what makes it difficult for doctors to 'starve out' cancer cells, for instance.

There is one sex-specific gene so vital, its function has remained unaltered throughout evolution and is found in almost all animals, according to new research. The gene, called Boule, is responsible for sperm production and appears to be the only gene exclusively required for sperm production from an insect to a mammal. All animal sperm production likely comes from a common prototype.

The risk for stroke doubles in the hour after drinking beer, wine or liquor, according to a small study. Researchers note, however, that moderate alcohol consumption (less than two drinks a day) appears to be protective over the long-term which may outweigh this temporary rise in immediate risk.