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Coffee improves short-term memory and speeds up reaction times by acting on the brain’s prefrontal cortex, according to a new study.
Researchers used functional magnetic resonance imaging (fMRI) to determine how coffee activates different areas of the brain in 15 volunteers.
“Caffeine modulates a higher brain function through its effects on distinct areas of the brain,” explains Florian Koppelstätter, who carried out the research with colleagues at the Medical University at Innsbruck, Austria.
The ocean current that gives western Europe its relatively balmy climate is stuttering, raising fears that it might fail entirely and plunge the continent into a mini ice age.
The dramatic finding comes from a study of ocean circulation in the North Atlantic, which found a 30% reduction in the warm currents that carry water north from the Gulf Stream.
The slow-down, which has long been predicted as a possible consequence of global warming, will give renewed urgency to intergovernmental talks in Montreal, Canada, this week on a successor to the Kyoto Protocol.
DISTRIBUTED computing experiment SETI@home will be switched off on December 15 as it becomes part of the Berkeley Open Infrastructure for Network Computing (BOINC).
BOINC has been developed at UC Berkeley as a framework for volunteer computing projects like SETI@home. The workunit totals of users and teams will be frozen at that point, and the final totals will be available on the web.
Decaffeinated coffee may have a harmful effect on the heart by increasing the levels of a specific cholesterol in the blood, researchers say. Their explanation is that caffeine-free coffee is often made from a type of bean with a higher fat content.
It's a space-opera scene we know by heart: The hero's tiny craft faces off against the vast enemy ship. Now scale down the set a billion times or so, and replace Luke Skywalker's X-wing and the Death Star with a clump of drug-bearing molecules and a misshapen cancer cell. This scenario -- from a National Cancer Institute video -- is just one possibility offered by the burgeoning field of cancer nanotechnology, where miniscule molecules are designed with literally atomic precision to combat a disease that kills half a million Americans every year.