Medical and recreational marijuana use has surged across the United States as more states legalize the drug, but young female athletes may want to think twice before taking a toke.
As a weekend heat wave that put more than 15 million Americans in the Northern and Central Plains on alert slowly moves east, the nation's emergency doctors have advice to keep you safe.
The football gridiron and the boxing ring have come to be understood as danger zones for the brain, with repetitive hits to the head causing long-term damage to some athletes.
