No matter what society says, sleep is not a luxury. It's a necessity. Even for the best sleepers, one night of poor sleep takes three full nights of sleep to recover. Here's why sleep matters, and how ...

A circadian biologist says your health is not doomed if you don’t get a full 8 hours of sleep every night. A new study finds the key to feeling rested may rely on a regular routine. Here & Now’s Deepa ...