Rough night? Depending on specific tweaks to their genes, some fruit flies have trouble falling asleep, and others can't stay asleep. Getting too little shut-eye hurts their memory. David M. Phillips/Science Source hide caption

toggle caption
David M. Phillips/Science Source

How Research On Sleepless Fruit Flies Could Help Human Insomniacs

  • Download
  • <iframe src="https://www.npr.org/player/embed/441159913/441371175" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

About 10 percent of Americans have chronic insomnia. iStockphoto hide caption

toggle caption
iStockphoto

There's more than one reason to aim for a good night's sleep. Charles Taylor/iStockphoto.com hide caption

toggle caption
Charles Taylor/iStockphoto.com