Body & Brain

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bottles of ketamine

BREAKDOWN  The anesthetic drug ketamine can ease depression, small studies have shown. But the benefit may come not from ketamine itself, but from one of its breakdown products, a new study suggests. 

Handguns at a gun show in Las Vegas

LOADED  Handguns on display at the Shooting, Hunting and Outdoor Trade Show in Las Vegas in January.

nerve cells affected by iron levels in the brain

RISK FACTOR  Pigmented nerve cells (black U-shape, center) in the human brain die in Parkinson’s disease, destruction that may be affected by iron levels.  

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