Body & Brain

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fruit fly

Older male fruit flies spent more time courting females after their dopamine levels were boosted in a handful of nerve cells.

Yersinia pestis bacteria

TINY KILLERS  Acquiring one gene and one mutation allowed these plague bacteria, Yersinia pestis (shown in yellow in a flea’s digestive system in this colored scanning electron micrograph), to cause deadly pandemics. 

young man vaping

DANGERS OF VAPING  E-cigarettes have surpassed cigarettes as the most commonly used tobacco product among teenagers. Medical researchers are sounding the alarm.

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