Science
Sex, flies and videotape – Phys.org
On a hot summer day, in a darkened chamber, a video camera follows a couple as it engages in nature’s oldest game—courtship. The male sings and chases after the female when suddenly a long tubular organ emerges from her rear end. The male recoils at first, bu…

On a hot summer day, in a darkened chamber, a video camera follows a couple as it engages in nature’s oldest gamecourtship. The male sings and chases after the female when suddenly a long tubular organ emerges from her rear end. The male recoils at first, but then returns to investigate. Is this a sign that the female is interested in moving on to the next phase, or should he try his luck elsewhere?
For many years, fruit fly investigators have been engaged in a passionate debate over the answer…