Roaches, the most disgusted, fearsome insects that are hated by most of the people worldwide. Yet, these prehistoric insects are the most successful and cosmopolitan insects of all time. Due to human activities, cockroaches can proliferate almost all the content in the Earth (except north and south pole). Cockroaches are generally detritus and scavenger, so they are not picky on the food that is offered to them; they feed on leftover food in dirty plates we left in the sink, cardboard piles that are stacked on the floor. They are also known to feed on droppings, vomitus and the dead body of their kind.