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 ...

Cockroaches are usually treated as simple creatures that react without pause, driven by instinct rather than experience. New laboratory work from Scotland suggests the picture is less fixed.