Worthy Parasites: A Villain's Silver Lining

People hate parasites. They're slimy and repulsive - worms emerging from blisters on the body, mites breeding in skin folds. They hold wild parties in our guts. They bring pestilence, misery...even death. But wait: parasites can also be good - really, really good! Author Rosemary Drisdelle explores these much maligned creatures and their importance in nature, and she unveils...