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6 March 2014 1:04 pm ,
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Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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ScienceShot: The Brain of a Cabbie
8 December 2011 12:00 pm
London taxi drivers aren't like the rest of us. Researchers have known for more than a decade that these elite cabbies—who train for years to master "the Knowledge," a mental map of 25,000 streets—have a larger than average rear hippocampus, a brain region linked to learning and navigation. What scientists didn't know was whether the drivers grew bigger hippocampi as they trained or whether they had big ones (and thus an innate navigation advantage) to begin with. So a team followed three groups—trainees who successfully acquired the Knowledge and became cabbies, trainees who failed to qualify, and a control group of non-taxi drivers—over 4 years, testing them and scanning their brains before, during, and after training. They found that the brains of qualifying trainees were no different from those of nonqualifying trainees or non-taxi drivers before beginning training. But as the cabbies learned the Knowledge, their hippocampi grew (see the progression from left to right), literally changing their minds, the researchers report online today in Current Biology. The hippocampi of unsuccessful trainees stayed the same throughout, which could suggest that successful cabbies really do have an innate advantage—their brains are more malleable than others'.
See more ScienceShots.