Intestinal worms, often unnoticed, can cause significant health issues. Symptoms range from stomach pain and fatigue to severe complications like blockages. Recognizing signs in stool, understanding ...

This undated image provided by Bugwood.org shows a hammerhead worm on a leaf in India. The narrow, snakelike flatworm has a head built like that of a hammerhead shark. Arun T.P. / AP After heavy ...

They rank pretty high on the ick factor with their skinny bodies and weird half-moon shaped heads, they're predatory and they are coated with a toxic slime. And they are in East Tennessee. Hammerhead ...