It is commonly assumed that because males produce many, tiny sperm, they are cheap to produce. Recent work, however, suggests that sperm production is not cost-free. If sperm are costly to produce, ...

Sex pheromones are vital in facilitating the chemical communication that underpins insect courtship and mating behavior. Among female American cockroaches (Periplaneta americana), two key volatile sex ...

Many people believe that cockroaches are simple creatures that act instinctively rather than consciously. The picture is less ...

Female cockroach droppings contained about 2,900 endotoxin units per milligram – more than twice the amount found in male droppings (1,400 EU/mg). On average, each female released around 5,000 ...