How to Avoid Brain-Eating Amoeba on Your NPS Vacation

America's famous hot springs come with a little-discussed risk: a lethal amoeba that prefers the same warm waters humans flock to. A new study from the US Geological Survey and Montana State University found Naegleria fowleri —the so-called "brain-eating amoeba"—in more than a third of 185 samples taken from...