While regular multivitamin use is not linked with early or localized prostate cancer, taking too many multivitamins may be associated with an increased risk for advanced or fatal prostate cancers, according to a study in the May 16 issue of the Journal of the National Cancer Institute. Millions of Americans take multivitamins because of a belief in their potential health benefits, even though there is limited scientific evidence that they prevent chronic disease. Researchers have wondered what impact multivitamin use might have on cancer risk. Karla Lawson, Ph.D., of the National Cancer Institute in Bethesda, Md., and colleagues followed 295,344 men enrolled in the National Institutes of Health-AARP Diet and Health Study to determine the association between multivitamin use and prostate cancer risk. After five years of follow-up, 10,241 men were diagnosed with prostate cancer, including 8,765 with localized cancers and 1,476 with advanced cancers. The researchers found no association between multivitamin use and the risk of localized prostate cancer. But they did find an increased risk of advanced and fatal prostate cancer among men who used multivitamins more than seven times a week, compared with men who did not use multivitamins. The association was strongest in […]
TOKYO — The ocean around Japan has warmed up faster than elsewhere in the world over the last hundred years partly because of global warming, Japan’s Meteorological Agency said on Tuesday. The sea surface temperature around central, western and southern Japan has climbed by 0.7 to 1.6 degrees Celsius in the last century, far higher than the world average of a 0.5 degree Celsius increase, a survey conducted by the agency showed. The findings were based on data collected by research and commercial vessels that started in the late 19th century. The agency said global warming was partly to blame for the fast rise in the ocean temperature around Japan. Reuters Pictures ‘But the areas surveyed were so small that we cannot say the rise in the water’s temperature has been caused entirely by global warming,’ it said. It did not specify why the ocean around Japan would be more affected than other parts of the world. The report comes at a time when the international community is struggling to take global action against climate change.
Warm temperatures melted an area of western Antarctica that adds up to the size of California in January 2005, scientists report. Satellite data collected by the scientists between July 1999 and July 2005 showed clear signs that melting had occurred in multiple distinct regions, including far inland and at high latitudes and elevations, where melt had been considered unlikely. ‘Antarctica has shown little to no warming in the recent past with the exception of the Antarctic Peninsula,’ said Konrad Steffen of the University of Colorado, Boulder. ‘But now large regions are showing the first signs of the impacts of warming as interpreted by this satellite analysis.’ Changes in the ice mass of Antarctica, Earth’s largest freshwater reservoir, are important to understanding global sea level rise. Large amounts of Antarctic freshwater flowing into the ocean also could affect ocean salinity, currents and global climate. NASA’s QuikScat satellite detected snowmelt by radar pulses that bounce off of ice that formed when snowmelt refroze (just as ice cream turns to ice when it is refrozen after being left out on the counter too long.) Maximum high temperatures of 41 degrees Fahrenheit that persisted for about a week in […]
WASHINGTON – Lt. Daniel Zimmerman, an infantry platoon leader in Iraq, puts a blog on the Internet every now and then ‘to basically keep my friends and family up to date’ back home. It just got tougher to do that for Zimmerman and a lot of other U.S. soldiers. No more using the military’s computer system to socialize and trade videos on MySpace, YouTube and nine other Web sites, the Pentagon says. Citing security concerns and technological limits, the Pentagon has cut off access to those sites for personnel using the Defense Department’s computer network. The change limits use of the popular outlets for service members on the front lines, who regularly post videos and journals. ‘I put my blog on there and my family reads it,’ said Zimmerman, 29, a platoon leader with B Company, 1st Battalion, 28th Infantry Regiment. ‘It scares the crap out of them sometimes,’ he said. ‘I keep it as vague as possible,’ he said. ‘I’m pretty responsible about it. It’s just basically to tell a little bit about my life over here’ he said. He’s regularly at a base where he doesn’t have Defense Department access to the […]
Is your brain you really necessary? The reason for my apparently absurd question is the remarkable research conducted at the University of Sheffield by neurology professor the late Dr. John Lorber. When Sheffield’s campus doctor was treating one of the mathematics students for a minor ailment, he noticed that the student’s head was a little larger than normal. The doctor referred the student to professor Lorber for further examination. The student in question was academically bright, had a reported IQ of 126 and was expected to graduate. When he was examined by CAT-scan, however, Lorber discovered that he had virtually no brain at all. Instead of two hemispheres filling the cranial cavity, some 4.5 centimetres deep, the student had less than 1 millimetre of cerebral tissue covering the top of his spinal column. The student was suffering from hydrocephalus, the condition in which the cerebrospinal fluid, instead of circulating around the brain and entering the bloodstream, becomes dammed up inside. Normally, the condition is fatal in the first months of childhood. Even where an individual survives he or she is usually seriously handicapped. Somehow, though, the Sheffield student had lived a perfectly normal life and […]