How Cockroaches Are Becoming Invincible

Cockroaches--or at least German ones--are becoming invincible. Researchers have found that Blattella germanica are becoming increasingly resistant to almost every kind of chemical insecticide. According to Science Magazine, not all insecticides are created equal. Some degrade the nervous system, whereas others attack the exoskeleton. But many insects, including cockroaches, have evolved resistance to at least one of the most commonly-used insecticides.