As the puck was cleared to the other end of the ice, my 9-year old son's hockey teammates raced after it. Then, I saw him. He was lying motionless and face down at the blue line. He had slid headfirst into the boards to make a play. By the time our coach made it over to him, he had started to move. After a few minutes, they both skated to the bench where I saw the two talking. Coach looked up at me in the stands with a grim look and motioned for me to come down. The next four hours were my introduction to sports concussions.

A concussion, clinically known as a Mild Traumatic Brain Injury (MTBI), is one of the most common yet least understood sports injuries. According to the Centers for Disease Control, there are as many as 300,000 sports and recreation-related concussions each year in the U.S., yet the diagnosis, immediate treatment and long-term effects are still a mystery to most coaches, parents and even some clinicians. The injury can be deceiving as there is rarely any obvious signs of trauma. If the head is not bleeding and the player either does not lose consciouness or regains it after a brief lapse, the potential damage is hidden and the usual "tough guy" mentality is to "shake it off" and get back in the game.

The recent suicide of Army scientist Bruce E. Ivins, shortly after being implicated, brought a likely end to the Anthrax scare of 2001 but, while information on this specific case remains sealed, the Global Terrorism Database at the University of Maryland is unclassified and available online to researchers. It contains more than 85,000 terror incidents since 1970. Hundreds of details associated with each incident are included to make the tool most useful to social scientists.

It shows that the 2001 anthrax attacks in the United States may be the only ones on record.

Bio-chemical terrorist attacks are very rare, according to Gary LaFree, director of the Global Terrorism Database at the University of Maryland, part of the U.S. Department of Homeland Security-funded National Consortium for the Study of Terrorism and Responses to Terrorism (START).

Male circumcision has been performed as far back as ancient Egypt, and the practice has continued through the ensuing centuries for religious, cultural and sociopolitical reasons.

Performing circumcision for potential health benefits gained momentum in the 19th century with the advent of anesthesia and the initial epidemiological studies demonstrating lower rates of venereal diseases in circumcised men. Recent studies have shown that circumcised men are at significantly lower risk of urinary tract infections and sexually transmitted infections such as syphilis and chancroid.

Additional studies point to lower risk of invasive penile carcinoma, gonorrhea and chlamydia (in female partners).

Mayo Clinic endocrinologist James Levine, M.D., Ph.D., has laid out some environment-changing innovations with a six-month study of a real-life office that was re-engineered to increase daily physical activity, a program called NEAT (non-exercise activity thermogenesis).

The study began in late 2007 and ended in 2008 at SALO, LLC, a Minneapolis-based financial staffing firm. Of the 45 employee volunteers involved in the scientific study, 18 were studied for weight loss and other changes.

New science indicating fluoride’s dangers to the brain and other organs will be presented by prominent fluoride research scientists during back-to-back conferences of the International Society for Fluoride Research (ISFR) and the Fluoride Action Network (FAN) in Toronto August 7-11, 2008. Fluoride, added to water supplies to prevent tooth decay, is also in virtually all non-organic foods and beverages. Fluoride's brain effects were never examined prior to water fluoridation.

Over the last decade, childhood obesity has grown into an epidemic, reflected in soaring rates of type 2 diabetes and recommendations that pediatricians check toddlers for elevated cholesterol.

What hasn't been as clear is how early to intervene.

A study presented at a pediatric research program on Friday suggested obesity prevention efforts should begin as early as age two, when children reach a "tipping point" in a progression that leads to obesity later in life.

The pinhole camera, a technique known since ancient times, has inspired a futuristic technology for lensless, three-dimensional imaging. Working at both the Advanced Light Source (ALS) at the U.S. Department of Energy's Lawrence Berkeley National Laboratory, and at FLASH, the free-electron laser in Hamburg, Germany, an international group of scientists has produced two of the brightest, sharpest x-ray holograms of microscopic objects ever made, thousands of times more efficiently than previous x-ray-holographic methods.

The x-ray hologram made at ALS beamline 9.0.1 was of Leonardo da Vinci's famous drawing "Vitruvian Man," a lithographic reproduction less than two micrometers (millionths of a meter, or microns) square, etched with an electron-beam nanowriter. The hologram required a five-second exposure and had a resolution of 50 nanometers (billionths of a meter).

INTRODUCTION

The most common causes of massive bleedings from the hemorrhagic erosive gastritis and similar lesions of duodenum and thin intestine, which well react on the operational treatment, are ulcerations induced with stress, or with ingestion of aspirins and alcohols. Stress, aspirin and alcohol, disrupt the “gel-function” of gastric mucus, so-called the mucosal barrier for the backscattering H-Jons, which is it’s the most important defensive factor.

The increased backscattering of H-Jons, enable ulterior damage, liberating vessel-active substances, and leads to degranulation of mastocits of gastric mucous membrane, and liberation of heparin, and consecutive bleeding.

On August 1, a total solar eclipse was visible in parts of Canada, northern Greenland, the Arctic, central Russia, Mongolia and China. The eclipse swept across Earth in a narrow path that began in Canada’s northern territory of Nunavut and ended in northern China’s Silk Road region.

Though the eclipse was not visible in most of North America, NASA TV and the Exploratorium made streaming video of the event available online. The following images are taken from that video, shot from the Xinjiang Uygur Autonomous Region in northwestern China near the Mongolian border. The sun appears differently in some of the images because of the different filters used to capture the event. Times listed are ET and approximate.

New knowledge points to the fact that a genetically induced lack of filaggrin, a key protein of the skin barrier, plays a decisive role in the origin of allergies.

In a large study on more than 3000 school-children scientists of the Helmholtz Zentrum München and the Technische Universität München found that about 8% of the German population carry variations of the filaggrin gene, which raise the risk to develop atopic dermatitis more than threefold. In addition, these genetic variations predispose to hay fever and asthma in those with atopic dermatitis.