Your body has evolved sophisticated warning systems to alert you to potential dangers. Learning to distinguish between ordinary discomfort and true warning signs requires tuning in to subtle ...

(CNN) -- A maker of body armor said Wednesday that nearly 100,000 of its vests may not be bullet-resistant and urged police departments nationwide to replace them. Second Chance Body Armor said it ...

required for carrying oxygen around the body. A common warning sign of a parasitic infection, this is because some worms feed on blood in the intestines, leading to chronic blood loss and reduced ...