This newest sexual revelation about dragonflies comes via a study in the journal Ecology that was supposed to be about climate change impacts. But while observing moorland hawker dragonflies, PhD student Rassim Khelifa realized that the ladies were frequently faking their own deaths. Once a female hawker has mated, any subsequent mating can damage her reproductive tract, so she's highly motivated to avoid aggressive males who might hurt her. And since the word "no" does not appear in the dragonfly lexicon, she resorts to a dramatic death. She freezes mid-air, as though a tiny heart attack has struck, then plummets to the ground and lies motionless. Her would-be partner then skidaddles off in search of some other female to prey on.