Findings

A new threat from Lyme-disease ticks

The small, unobtrusive tick called Ixodes scapularis received worldwide medical attention almost 20 years ago, when it was found to play a crucial role in the transmission of Lyme disease. Although...

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Chronic cocaine use may dull responsiveness to brain signals

In a study measuring the brain’s degree of excitability, the brains of cocaine-dependent people show an abnormally low response to signals in the region responsible for muscle movement, according to...

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