Underground pitchers. (Martin Dančák) We often think of plants as sedate, tranquil organisms that can't help but keep to themselves. But not all plants are harmless wallflowers. Carnivorous plants, as the name suggests, eat prey – mostly bugs, but also small animals, and other nutrient-rich matter. While the whole idea seems vaguely nightmarish at first, these "ecologically unique" plants need our protection just like any other threatened organism; and we're still finding examples of these carnivores we've never even noticed before. In the latest such discovery, scientists have now reported the identification of a previously unknown species of carnivorous plant,...