Cockroach decapitation may seem macabre, but scientists have conducted many experiments with headless roach bodies and bodiless roach heads to answer serious questions.

• 没有头的蟑螂或许令人毛骨悚然，但科学家利用肢解的蟑螂身体及头部进行过很多实验，以探讨一些严肃的议题。